# Alpha Dream Construction > California design-build firm specializing in ADUs, garage conversions, kitchen and bathroom remodels, additions, and whole-home remodels. Two studios: Los Angeles (LA County, OC, IE, Ventura) and Bay Area (SF, Peninsula, East Bay, South Bay, North Bay). CSLB licensed. ## Service Pillars (California) - [ADU Builder](https://alphaconstruction-ca.com/services/adu-builder) - [Garage Conversion](https://alphaconstruction-ca.com/services/garage-conversion) - [JADU Builder](https://alphaconstruction-ca.com/services/jadu-builder) - [Kitchen Remodeling](https://alphaconstruction-ca.com/services/kitchen-remodeling) - [Bathroom Remodeling](https://alphaconstruction-ca.com/services/bathroom-remodeling) - [Home Additions](https://alphaconstruction-ca.com/services/home-additions) - [Whole-Home Remodeling](https://alphaconstruction-ca.com/services/whole-home-remodeling) - [Detached ADU](https://alphaconstruction-ca.com/services/detached-adu) - [Roofing](https://alphaconstruction-ca.com/services/roofing) - [Concrete & Flatwork](https://alphaconstruction-ca.com/services/concrete) - [Foundation](https://alphaconstruction-ca.com/services/foundation) - [Seismic Retrofit](https://alphaconstruction-ca.com/services/seismic-retrofit) - [New Construction](https://alphaconstruction-ca.com/services/new-construction) - [Multifamily Remodeling](https://alphaconstruction-ca.com/services/multifamily-remodeling) - [Commercial Tenant Improvement](https://alphaconstruction-ca.com/services/commercial-tenant-improvement) - [Framing & Carpentry](https://alphaconstruction-ca.com/services/framing) - [Siding & Stucco](https://alphaconstruction-ca.com/services/siding-stucco) - [Windows & Doors](https://alphaconstruction-ca.com/services/windows-doors) - [Decks & Patios](https://alphaconstruction-ca.com/services/decks-patios) - [Electrical & Panel Upgrades](https://alphaconstruction-ca.com/services/electrical) - [Plumbing & Repipes](https://alphaconstruction-ca.com/services/plumbing) - [HVAC & Heat Pumps](https://alphaconstruction-ca.com/services/hvac) - [Interior & Exterior Painting](https://alphaconstruction-ca.com/services/painting) - [Drainage & Waterproofing](https://alphaconstruction-ca.com/services/drainage-waterproofing) ## Regional Hubs - [Los Angeles studio](https://alphaconstruction-ca.com/locations/los-angeles) - [Bay Area studio](https://alphaconstruction-ca.com/locations/bay-area) - [ADU Builder — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/adu-builder) - [ADU Builder — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/adu-builder) - [Garage Conversion — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/garage-conversion) - [Garage Conversion — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/garage-conversion) - [JADU Builder — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/jadu-builder) - [JADU Builder — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/jadu-builder) - [Kitchen Remodeling — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/kitchen-remodeling) - [Kitchen Remodeling — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/kitchen-remodeling) - [Bathroom Remodeling — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/bathroom-remodeling) - [Bathroom Remodeling — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/bathroom-remodeling) - [Home Additions — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/home-additions) - [Home Additions — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/home-additions) - [Whole-Home Remodeling — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/whole-home-remodeling) - [Whole-Home Remodeling — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/whole-home-remodeling) - [Detached ADU — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/detached-adu) - [Detached ADU — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/detached-adu) - [Roofing — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/roofing) - [Roofing — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/roofing) - [Concrete & Flatwork — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/concrete) - [Concrete & Flatwork — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/concrete) - [Foundation — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/foundation) - [Foundation — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/foundation) - [Seismic Retrofit — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/seismic-retrofit) - [Seismic Retrofit — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/seismic-retrofit) - [New Construction — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/new-construction) - [New Construction — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/new-construction) - [Multifamily Remodeling — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/multifamily-remodeling) - [Multifamily Remodeling — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/multifamily-remodeling) - [Commercial Tenant Improvement — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/commercial-tenant-improvement) - [Commercial Tenant Improvement — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/commercial-tenant-improvement) - [Framing & Carpentry — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/framing) - [Framing & Carpentry — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/framing) - [Siding & Stucco — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/siding-stucco) - [Siding & Stucco — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/siding-stucco) - [Windows & Doors — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/windows-doors) - [Windows & Doors — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/windows-doors) - [Decks & Patios — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/decks-patios) - [Decks & Patios — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/decks-patios) - [Electrical & Panel Upgrades — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/electrical) - [Electrical & Panel Upgrades — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/electrical) - [Plumbing & Repipes — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/plumbing) - [Plumbing & Repipes — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/plumbing) - [HVAC & Heat Pumps — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/hvac) - [HVAC & Heat Pumps — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/hvac) - [Interior & Exterior Painting — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/painting) - [Interior & Exterior Painting — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/painting) - [Drainage & Waterproofing — Los Angeles](https://alphaconstruction-ca.com/locations/los-angeles/drainage-waterproofing) - [Drainage & Waterproofing — Bay Area](https://alphaconstruction-ca.com/locations/bay-area/drainage-waterproofing) ## Bay Area Sub-Regions - [East Bay](https://alphaconstruction-ca.com/locations/bay-area/east-bay) - [South Bay](https://alphaconstruction-ca.com/locations/bay-area/south-bay) - [Peninsula](https://alphaconstruction-ca.com/locations/bay-area/peninsula) - [North Bay](https://alphaconstruction-ca.com/locations/bay-area/north-bay) ## Field Guides - [The Los Angeles ADU permit process, step by step](https://alphaconstruction-ca.com/guides/la-adu-permit-process): The actual six-step ADU permit process inside the City of LA in 2026. Real LADBS timelines, fees, and corrections — from a builder who's permitted dozens. - [LADBS ePlan: a builder's walkthrough of the LA permit portal](https://alphaconstruction-ca.com/guides/ladbs-eplan-walkthrough): How LADBS's electronic plan-check portal actually works in 2026. File types, naming conventions, correction workflow, and the mistakes that cost a week each. ## Service Areas — Los Angeles - [LA — Westside (Santa Monica · Venice · Brentwood · Mar Vista) ADU & remodel guide](https://alphaconstruction-ca.com/areas/la-westside) - [LA — Eastside / NELA (Silver Lake · Echo Park · Highland Park · Eagle Rock · Atwater) ADU & remodel guide](https://alphaconstruction-ca.com/areas/la-eastside) - [San Fernando Valley (Sherman Oaks · Studio City · Encino · Tarzana · Woodland Hills) ADU & remodel guide](https://alphaconstruction-ca.com/areas/la-valley) - [South Bay (Manhattan · Hermosa · Redondo · Torrance · El Segundo · PV) ADU & remodel guide](https://alphaconstruction-ca.com/areas/la-south-bay) - [LA — Hills & Canyons (Hollywood Hills · Beverly Hills · Bel-Air · Laurel/Coldwater) ADU & remodel guide](https://alphaconstruction-ca.com/areas/la-hills) - [San Gabriel Valley (Pasadena · Glendale · Burbank · Arcadia · South Pasadena) ADU & remodel guide](https://alphaconstruction-ca.com/areas/la-sgv) - [Ventura County (Oxnard · Camarillo · Thousand Oaks · Ventura) ADU & remodel guide](https://alphaconstruction-ca.com/areas/ventura) - [Orange County (Newport · Irvine · Huntington Beach · Laguna · Anaheim) ADU & remodel guide](https://alphaconstruction-ca.com/areas/orange-county) - [Inland Empire (Riverside · San Bernardino · Corona · Rancho Cucamonga) ADU & remodel guide](https://alphaconstruction-ca.com/areas/inland-empire) ## Service Areas — Bay Area - [Oakland, CA ADU & remodel guide](https://alphaconstruction-ca.com/areas/bay/oakland) - [San Jose, CA ADU & remodel guide](https://alphaconstruction-ca.com/areas/bay/san-jose) - [San Francisco, CA ADU & remodel guide](https://alphaconstruction-ca.com/areas/bay/san-francisco) - [Fremont, CA ADU & remodel guide](https://alphaconstruction-ca.com/areas/bay/fremont) - [Walnut Creek, CA ADU & remodel guide](https://alphaconstruction-ca.com/areas/bay/walnut-creek) - [Berkeley, CA ADU & remodel guide](https://alphaconstruction-ca.com/areas/bay/berkeley) - [Richmond, CA ADU & remodel guide](https://alphaconstruction-ca.com/areas/bay/richmond) - [Sunnyvale, CA ADU & remodel guide](https://alphaconstruction-ca.com/areas/bay/sunnyvale) - [Palo Alto, CA ADU & remodel guide](https://alphaconstruction-ca.com/areas/bay/palo-alto) - [Livermore, CA ADU & remodel guide](https://alphaconstruction-ca.com/areas/bay/livermore) ## City Comparisons - [oakland vs berkeley (East Bay)](https://alphaconstruction-ca.com/compare/oakland-vs-berkeley): East Bay owners weighing an ADU between Oakland (Hills WUI + soft-story overlay) and Berkeley (denser flatland lots, stricter rent-control history). Permit timelines, cost-per-sqft, and zoning treatment diverge in ways the cities themselves don't advertise. - [san-francisco vs oakland (Bay Area core)](https://alphaconstruction-ca.com/compare/san-francisco-vs-oakland): Bay Area owners weighing an ADU in San Francisco (DBI plan-check, RH-1/RH-2 lots, Sunset/Richmond garage conversions) vs Oakland (looser ordinance, EBMUD water drop, Hills WUI). Cost-per-sqft and permit clock are the headline differences. - [san-jose vs sunnyvale (South Bay)](https://alphaconstruction-ca.com/compare/san-jose-vs-sunnyvale): South Bay owners deciding between San Jose's pre-approved ADU program (fastest plan-check in the state) and Sunnyvale's straightforward objective-standards review. Lot sizes, hillside overlays, and water-utility splits move the math more than people expect. - [san-jose vs palo-alto (South Bay / Peninsula)](https://alphaconstruction-ca.com/compare/san-jose-vs-palo-alto): Two of the Bay Area's most permitting-mature jurisdictions, with radically different cost bases. San Jose's pre-approved plans bring detached ADUs under $475/sqft; Palo Alto's design culture and labor rates rarely close below $625/sqft for the same scope. - [berkeley vs richmond (West Contra Costa)](https://alphaconstruction-ca.com/compare/berkeley-vs-richmond): Investor-owners frequently compare Berkeley (high ARV, slow plan check, rent-control overlay) against Richmond (lower ARV, friendlier permitting, fewer overlays). Net yield often surprises — Richmond's faster permit clock matters more than headline cost. - [fremont vs livermore (Tri-Valley / South-East Bay)](https://alphaconstruction-ca.com/compare/fremont-vs-livermore): Two of the Bay Area's largest single-family permit pipelines. Fremont (objective standards, Mission Peak hillside zone) vs Livermore (Wine Country setback rules, slower planning queue). Owners building for multigenerational housing weigh these monthly. - [la-westside vs la-eastside (City of LA)](https://alphaconstruction-ca.com/compare/la-westside-vs-eastside): Two LADBS-served quadrants with very different cost stacks. Westside (Coastal Zone, premium labor) vs Eastside (HPOZ overlays in Highland Park / Boyle Heights, lower labor rate). Same building code; very different end-cost. - [la-westside vs la-valley (City of LA)](https://alphaconstruction-ca.com/compare/la-westside-vs-valley): Westside owners cross-shopping the Valley for ADU economics: same City of LA permit process, ~25% lower per-sqft on labor, easier lot geometries. The trade-off is rental comp and Title-24 envelope spec for hotter climate zones. - [la-hills vs la-westside (City of LA)](https://alphaconstruction-ca.com/compare/la-hills-vs-flatland): BHO (Baseline Hillside Ordinance) lots vs flatland Westside parcels — same city, very different soils reports, retaining, and access cost. We've seen the same square footage swing $150k between the two. - [la-south-bay vs orange-county (Coastal Southern California)](https://alphaconstruction-ca.com/compare/south-bay-vs-orange-county): Coastal-adjacent owners deciding where to build: South Bay (LA County coastal cities, Coastal Commission for some) vs Orange County (separate jurisdictions, faster permits, often lower fees). Coastal Development Permit triggers can flip the timeline. - [la-sgv vs inland-empire (East LA Basin)](https://alphaconstruction-ca.com/compare/sgv-vs-inland-empire): SGV (San Gabriel Valley) owners and Inland Empire owners both face longer permit clocks than core LA — but for different reasons. SGV has city-by-city HPOZ variance; IE has lower base cost but more conservative ministerial review. - [ventura vs orange-county (Coastal California)](https://alphaconstruction-ca.com/compare/ventura-vs-orange-county): Two California coastal counties with very different fee structures and review queues. Ventura's smaller permit volume can mean faster turnaround; Orange County's pre-approved-plan programs in some cities collapse plan check below 8 weeks. ## Journal - [How much does an ADU really cost in Los Angeles in 2026?](https://alphaconstruction-ca.com/journal/how-much-does-an-adu-cost-in-los-angeles-2026): An honest 2026 breakdown of LA ADU costs — hard costs per square foot, soft costs, utility upgrades, and the fees most homeowners forget to budget. - [The Los Angeles ADU permit process, explained step-by-step](https://alphaconstruction-ca.com/journal/los-angeles-adu-permit-process-explained): Every step of the LADBS ADU permit pipeline — pre-application, plan check, corrections, fees, and the inspections that decide your schedule. - [ADU financing in California: HELOC vs RenoFi vs construction loan](https://alphaconstruction-ca.com/journal/adu-financing-in-california-heloc-vs-renofi-vs-construction-loan): Five real ways California homeowners pay for ADUs in 2026 — HELOCs, cash-out refis, construction loans, RenoFi, and the CalHFA grant program — with the math behind each. - [ADU ROI in Los Angeles: rental income vs resale value, honestly](https://alphaconstruction-ca.com/journal/adu-roi-los-angeles-rental-income-and-resale-value): Real numbers on what an LA ADU returns — monthly rent by neighborhood, resale appraisal lift, and the breakeven math no contractor wants to walk through. - [Detached ADU vs garage conversion: how to choose for your LA lot](https://alphaconstruction-ca.com/journal/detached-vs-garage-conversion-adu-which-is-right-for-your-lot): When a garage conversion is the smart move and when it's a trap — comparing cost, code, livability, and resale across the two most common LA ADU formats. - [Hillside ADUs in LA: what the BHO actually requires](https://alphaconstruction-ca.com/journal/hillside-adus-in-los-angeles-what-the-bho-actually-requires): The Baseline Hillside Ordinance, plain-language. What it allows for ADUs, what it limits, and the cost realities of building on an LA hillside lot in 2026. - [California SB 9 vs ADU laws: what actually changed in 2024–2025](https://alphaconstruction-ca.com/journal/california-sb-9-vs-adu-laws-what-actually-changed-in-2024-2025): SB 9, AB 1033, SB 1211, and the dozens of other California housing bills — what they actually allow on your LA lot in 2026, with no spin. - [Multigenerational living and the quiet rise of the ADU](https://alphaconstruction-ca.com/journal/multigenerational-living-and-the-rise-of-the-adu): Why ADUs have become the dominant housing format for multigenerational families in California — the AARP data, the design choices, and the LA-specific patterns we see. - [Coastal Zone ADUs: Malibu, Santa Monica, Venice permit realities](https://alphaconstruction-ca.com/journal/coastal-zone-adus-malibu-santa-monica-venice-permit-realities): What the Coastal Commission actually requires for ADUs in the LA Coastal Zone — process, timeline, fees, and the design choices that make a CDP application sail through. - [JADU vs ADU vs detached ADU: the real differences](https://alphaconstruction-ca.com/journal/jadu-vs-adu-vs-detached-adu-the-real-differences): California recognizes three distinct accessory unit formats. Here's exactly what each is, what each allows, and why most LA homeowners pick the wrong one first. - [Prefab vs site-built ADUs: honest tradeoffs](https://alphaconstruction-ca.com/journal/prefab-vs-site-built-adus-honest-tradeoffs): Modular and panelized ADUs promise speed and cost certainty. Here's where the promises hold up in LA, and where the math quietly breaks down. - [Mistakes LA homeowners make with their first ADU](https://alphaconstruction-ca.com/journal/mistakes-la-homeowners-make-with-their-first-adu): Twelve avoidable mistakes we see on first-time LA ADU projects — from surveying the wrong setback to financing on rate-lock assumptions that don't survive plan check. ## Glossary - [ADU (Accessory Dwelling Unit)](https://alphaconstruction-ca.com/glossary/adu): A self-contained second home on a residential lot, with its own kitchen, bath, and entrance. - [JADU (Junior Accessory Dwelling Unit)](https://alphaconstruction-ca.com/glossary/jadu): A smaller ADU carved out of the existing house, capped at 500 sqft, with owner-occupancy required. - [LADBS (LA Department of Building and Safety)](https://alphaconstruction-ca.com/glossary/ladbs): The City of Los Angeles agency that issues building permits and conducts inspections. - [ePlan](https://alphaconstruction-ca.com/glossary/eplan): LADBS's fully electronic plan-check portal for residential and commercial permits. - [HPOZ (Historic Preservation Overlay Zone)](https://alphaconstruction-ca.com/glossary/hpoz): City of LA designation that imposes design review on alterations within a historic neighborhood. - [BHO (Baseline Hillside Ordinance)](https://alphaconstruction-ca.com/glossary/bho): City of LA rules governing residential construction on hillside lots — height, grading, haul routes. - [Coastal Development Permit (CDP)](https://alphaconstruction-ca.com/glossary/coastal-development-permit): Permit required for construction inside California's Coastal Zone, issued by the city or the California Coastal Commission. - [Ministerial Review](https://alphaconstruction-ca.com/glossary/ministerial-review): Permit review based purely on objective standards — no public hearing, no discretion. - [AB 68](https://alphaconstruction-ca.com/glossary/ab-68): 2020 California law that streamlined ADU permits — 60-day clock, parking exemptions, ministerial review. - [AB 2221](https://alphaconstruction-ca.com/glossary/ab-2221): 2022 amendment that closed loopholes in AB 68 — clarified setbacks, height, and the 60-day clock. - [SB 9](https://alphaconstruction-ca.com/glossary/sb-9): 2021 California law allowing ministerial lot splits and duplexes on most single-family lots. - [SB 1211](https://alphaconstruction-ca.com/glossary/sb-1211): 2024 California law expanding ADUs on multifamily lots — up to 8 detached ADUs allowed. - [Title 24](https://alphaconstruction-ca.com/glossary/title-24): California's energy efficiency code — required for all new construction and most additions. - [Soft-Story Retrofit](https://alphaconstruction-ca.com/glossary/soft-story-retrofit): Mandatory seismic strengthening of older multifamily buildings with weak ground floors. - [Soils Report](https://alphaconstruction-ca.com/glossary/soils-report): Engineering study of subsurface soil conditions, required for hillside and certain ADU lots. - [Setback](https://alphaconstruction-ca.com/glossary/setback): Minimum distance a structure must be from a property line. - [FAR (Floor Area Ratio)](https://alphaconstruction-ca.com/glossary/far): The ratio of total building floor area to lot size — caps how much you can build. - [BMO (Baseline Mansionization Ordinance)](https://alphaconstruction-ca.com/glossary/bmo): City of LA rules limiting the size of single-family homes in non-hillside R1 zones. - [LA City Planning](https://alphaconstruction-ca.com/glossary/la-planning): The City of LA agency that handles zoning, entitlements, and HPOZ review. - [LADWP (LA Department of Water and Power)](https://alphaconstruction-ca.com/glossary/ladwp): City of LA's water and electrical utility — handles ADU service connections and meter sets. - [Construction Loan](https://alphaconstruction-ca.com/glossary/construction-loan): Short-term loan covering construction costs, converted to a permanent mortgage at completion. - [HELOC (Home Equity Line of Credit)](https://alphaconstruction-ca.com/glossary/heloc): Revolving credit line secured by your home's equity — common ADU financing path. - [RenoFi Loan](https://alphaconstruction-ca.com/glossary/renofi): Renovation loan that underwrites based on the home's value AFTER the work is completed. - [CSLB (Contractors State License Board)](https://alphaconstruction-ca.com/glossary/csrlb): California state agency that licenses and regulates construction contractors. - [HERS Rating](https://alphaconstruction-ca.com/glossary/hers): Field verification of energy-efficiency measures required by Title 24. ## ADU Types - [Detached ADU](https://alphaconstruction-ca.com/adu-types/detached): What a detached ADU really costs in LA and the Bay Area in 2026 — installed price per sqft, permit clock, and the lot conditions that decide whether it pencils. - [Attached ADU](https://alphaconstruction-ca.com/adu-types/attached): Attached ADUs share a wall with the main house — cheaper than detached, faster than additions. What it costs in LA and the Bay Area, and the structural traps to plan for. - [Garage Conversion ADU](https://alphaconstruction-ca.com/adu-types/garage-conversion): Converting your garage to a permitted ADU is the fastest, cheapest path to a rentable second unit. Real LA and Bay Area numbers, plus the foundation and Title 24 surprises. - [Junior ADU (JADU)](https://alphaconstruction-ca.com/adu-types/jadu): A Junior ADU is a 500-sqft unit carved out of your existing house. Owner-occupancy required, but the permit is simple and the build is cheap. LA + Bay Area pricing for 2026. - [Two-Story ADU](https://alphaconstruction-ca.com/adu-types/two-story): When the lot's narrow, you build up. Two-story ADUs let you hit 1,200 sqft on a tight footprint. LA + Bay Area cost ranges, height limits, and the privacy rules to watch. - [Basement ADU](https://alphaconstruction-ca.com/adu-types/basement): Basement ADUs are common in older Bay Area homes and a few LA hillside neighborhoods. Egress, daylight, and moisture decide whether the conversion pencils. ## Construction Products + Components - [Detached ADU (ADU Builder)](https://alphaconstruction-ca.com/services/adu-builder/detached-adu): Standalone backyard ADUs across California — foundation to keys. State ADU law, LADBS / SF DBI permits, 600–1,200 sqft layouts, full design-build pricing for 2026. - [Attached ADU (ADU Builder)](https://alphaconstruction-ca.com/services/adu-builder/attached-adu): Attached ADU additions across California — share one wall with the main house, save on foundation and roof, keep more backyard. Permits, scope, 2026 pricing. - [ADU Foundation & Slab (ADU Builder)](https://alphaconstruction-ca.com/services/adu-builder/adu-foundation): Engineered ADU foundations across California — slab on grade, stem wall, pier-and-grade-beam for hillsides. Soils reports, seismic detailing, 2026 pricing. - [Garage Slab Prep & Repair (Garage Conversion)](https://alphaconstruction-ca.com/services/garage-conversion/slab-prep): Evaluating, repairing, and leveling existing garage slabs for ADU conversion in California. Crack repair, vapor retarder retrofit, level set, code compliance. - [Fire Separation Wall (Garage to Living) (Garage Conversion)](https://alphaconstruction-ca.com/services/garage-conversion/fire-separation-wall): 1-hour fire-rated wall and ceiling assemblies for attached garage conversions in California. CBC compliance, gypsum spec, draft-stopping, self-closing doors. - [JADU Kitchenette (JADU Builder)](https://alphaconstruction-ca.com/services/jadu-builder/jadu-kitchenette): Efficiency kitchenette buildouts for Junior ADUs across California. State law compliance, 120V appliances, plumbing, electrical, finish — 2026 pricing. - [JADU Efficiency Bathroom (JADU Builder)](https://alphaconstruction-ca.com/services/jadu-builder/jadu-efficiency-bath): Efficiency bathroom buildouts for Junior ADUs across California. 30 sqft layouts, code-compliant fixtures, plumbing tie-in, ventilation, 2026 pricing. - [Kitchen Cabinets (Kitchen Remodeling)](https://alphaconstruction-ca.com/services/kitchen-remodeling/cabinets): Custom, semi-custom, and stock kitchen cabinets installed across LA and the Bay Area. Construction styles, door profiles, seismic anchoring, 2026 pricing. - [Kitchen Countertops (Kitchen Remodeling)](https://alphaconstruction-ca.com/services/kitchen-remodeling/countertops): Quartz, granite, marble, soapstone, and porcelain countertops installed across LA and the Bay Area. Slab selection, templating, seam placement, 2026 pricing. - [Shower Waterproofing (Bathroom Remodeling)](https://alphaconstruction-ca.com/services/bathroom-remodeling/shower-waterproofing): Schluter Kerdi, hot-mopped, and sheet-membrane shower waterproofing installed across LA and the Bay Area. ANSI A118.10 compliance, leak-free 20+ year systems. - [Shower Glass Enclosure (Bathroom Remodeling)](https://alphaconstruction-ca.com/services/bathroom-remodeling/glass-enclosure): Frameless, semi-frameless, and framed shower glass enclosures across LA and the Bay Area. 3/8" and 1/2" tempered glass, custom templating, hardware options. - [Second-Story Pop-Up Addition (Home Additions)](https://alphaconstruction-ca.com/services/home-additions/second-story-pop-up): Pop-up second-story additions across LA and the Bay Area. Foundation review, structural retrofit, dust containment, staying in the house during build, 2026 pricing. - [Sunroom / Conservatory Addition (Home Additions)](https://alphaconstruction-ca.com/services/home-additions/sunroom): Three-season and year-round sunroom additions across LA and the Bay Area. Glass roof options, climate control, foundation, permits, 2026 pricing. - [Roof Replacement (Whole-Home Remodeling)](https://alphaconstruction-ca.com/services/whole-home-remodeling/roofing): Asphalt, tile, metal, and TPO roof replacement across LA and the Bay Area. Title 24 cool-roof requirements, fire-rating, 30+ year warranties, 2026 pricing. - [Windows & Exterior Doors (Whole-Home Remodeling)](https://alphaconstruction-ca.com/services/whole-home-remodeling/windows-doors): Energy-efficient window and exterior door replacement across LA and the Bay Area. Milgard, Marvin, Andersen, low-E glass, Title 24 compliance, 2026 pricing. ## Tools - [ADU cost calculator](https://alphaconstruction-ca.com/tools/adu-cost-calculator) - [Site index](https://alphaconstruction-ca.com/site-index) ## Optional - [Services overview](https://alphaconstruction-ca.com/services) - [Projects](https://alphaconstruction-ca.com/projects) - [Process](https://alphaconstruction-ca.com/process) - [FAQ](https://alphaconstruction-ca.com/faq) - [Contact](https://alphaconstruction-ca.com/contact)