Single-family
home builder.
Single-family is the largest category we build — flat-lot infill, hillside replacements, suburban subdivisions of one parcel at a time. The work spans production-grade builds on stock plans through full-custom architect-led homes, but the engineering discipline does not change with finish level: parcel diligence, geotech, Title 24, plan check, and field execution apply to every SFR we touch.
CA Lic. #1145233
“A good single-family build is invisible — the parcel works, the schedule held, the inspections cleared, and the owner moved in on the date in the contract.”
What we mean by single-family home builder.
S-01 · Production SFR
- Size
- 1,400 – 2,800 sqft
- All-in
- $400 – $600 / sqft
- Schedule
- 9 – 13 months build
Stock plan library with site-specific modifications. Fastest pre-construction, repeatable cost certainty, target market is owner-occupant or small developer.
S-02 · Semi-custom SFR
- Size
- 1,800 – 3,500 sqft
- All-in
- $500 – $800 / sqft
- Schedule
- 10 – 14 months build
Modified envelope on a known structural system. Architect involvement on key spaces (kitchen, primary, exterior). Finish program is custom.
S-03 · Full-custom SFR
- Size
- 2,200 – 6,500 sqft
- All-in
- $650 – $1,200 / sqft
- Schedule
- 14 – 20 months build
Architect-led, parcel-specific. Pre-construction is longer; finish program is fully custom; structural and MEP are bespoke.
S-04 · Replacement SFR on existing lot
- Size
- Replaces existing footprint
- All-in
- $500 – $1,000 / sqft + demo
- Schedule
- 14 – 22 months total
Tear-down plus ground-up rebuild on owner-occupied parcels. Coordinated demo with abatement, then full new-construction permit.
Real California cost ranges.
All-in 2026 single-family costs in California run $400–$600/sqft for production-grade, $500–$800/sqft for semi-custom, and $650–$1,200/sqft for full-custom on flat lots. Hillside and coastal adders apply per parcel. Soft costs are 12–18% of hard-cost subtotal on flat lots, 16–22% on hillside.
Architecture + engineering
Production: 4–6% of hard cost. Semi-custom: 6–10%. Full-custom: 10–14%. Structural 1.5–3% across the board. Title 24 + CALGreen 0.5–1%.
Foundation
Slab-on-grade $25–$45/sqft on flat lots. Pier + grade-beam $50–$90/sqft. Caissons $80–$160/sqft in fault-zone or hillside soils.
Envelope
Production stucco-and-fiber-cement $40–$80/sqft. Semi-custom $60–$120/sqft. Full-custom $100–$220/sqft.
Interior finishes
Production $80–$150/sqft. Semi-custom $150–$280/sqft. Full-custom $250–$500+/sqft.
Title 24 systems
Heat pumps, solar PV, battery readiness, high-performance envelope — $35–$70/sqft above 2019-code construction.
Owner contingency
10% production, 15% semi-custom, 20% full-custom / first-time owner-builder, 25% hillside or coastal.
The permit path.
SFR permits are issued by the local building department (LADBS in City of LA, SF DBI in San Francisco, county or city building department elsewhere). The package typically clears in 8–32 weeks with 1–4 correction cycles depending on jurisdiction and project complexity. Hillside, coastal, and WUI overlays add review time.
- Building permit (architectural + structural)
- Mechanical, electrical, plumbing permits
- Title 24 energy compliance per CEC 2022 code
- CALGreen residential mandatory measures worksheet
- Grading permit when cut/fill > 50 cubic yards
- Hillside Compliance Review on LA hillside parcels
- Coastal Development Permit in the Coastal Zone
- WUI assembly review in VHFHSZ
How California code shapes the work.
California single-family is designed against CEC 2022 Title 24 (heat-pump-first), CALGreen mandatory measures, and the locally-adopted California Residential Code. Coastal, hillside, fault-rupture, liquefaction, methane, and VHFHSZ overlays each add reports and assemblies at plan check.
What the schedule actually looks like.
- Step 012 – 4 weeks
Feasibility + program
Zoning envelope, parcel diligence, owner program.
- Step 028 – 16 weeks
Schematic + DD
Production: short. Custom: longer.
- Step 036 – 14 weeks
Construction documents
Permit-set drawings, Title 24, CALGreen, civil.
- Step 048 – 32 weeks
Plan check + permit
Varies sharply by jurisdiction.
- Step 054 – 12 weeks
Sitework + foundation
Grading, utilities, foundation pour.
- Step 068 – 14 weeks
Framing → dry-in
Framing, sheathing, roof, windows.
- Step 0714 – 24 weeks
MEP + finishes
Rough, insulation, drywall, finishes.
- Step 083 – 6 weeks
Commissioning + CofO
HVAC start-up, solar interconnection, finals.
How we run this work.
We scope every single-family project at three depths — production, semi-custom, custom — and write the contract against the depth you choose. The contract structure, fee, and schedule risk all reflect that choice.
Production SFR uses a vetted plan library with parcel-specific modifications, named subcontractors, and pre-priced allowances. Cost certainty is higher; schedule risk is lower; finish program is constrained.
Custom and semi-custom run a longer design loop with priced design milestones, so the cost picture sharpens as the design tightens. We do not lock a number on schematic drawings.
Frequently asked.
- What is the cheapest way to build a new single-family home in California?
- Production-grade SFR on a flat lot in a suburban jurisdiction, using a stock plan library with site-specific modifications, currently runs $400–$600/sqft all-in. Going below that band typically means cutting Title 24 compliance corners (not legal) or accepting low-grade finishes that won't last 10 years.
- Do I need an architect for a single-family build?
- California requires a licensed architect or licensed engineer to stamp drawings for any habitable structure other than single-family or two-family dwellings up to two stories of light wood-frame (Business & Professions Code §5537). Production SFR can be built off plans stamped by an engineer; semi-custom and custom usually need an architect.
- How long does a single-family home take from contract to keys?
- Production-grade flat lot: 14–20 months total. Semi-custom: 18–26 months. Full-custom: 24–36 months. Hillside or coastal adds 6–12 months. Bay Area dense jurisdictions sit at the long end of every band.
- What is the difference between production and custom?
- Production uses a stock plan library, repeats subcontractor scopes, and prices on volume. Custom designs each plan once, prices each scope once, and carries higher soft costs. Production gives you cost certainty; custom gives you a parcel-specific design.
- Can I be my own general contractor?
- Legally yes, on a home you intend to occupy for at least 12 months (CSLB owner-builder exemption). Practically, owner-builder ground-up SFR projects run 25–40% over budget and 30–60% over schedule in published industry data; the savings on the GC fee rarely cover the carrying cost and rework.
- Does the home need solar?
- Yes for almost all new low-rise residential under CEC 2022 Title 24. The code requires PV sized to projected annual electrical load with limited exemptions, and battery storage readiness in several climate zones.
- What is the warranty?
- California requires a 1-year general warranty under SB 800. We offer extended warranty on systems and finishes per contract and provide a one-year and ten-year walk-back per California law.
Start with a feasibility memo.
Tell us about the parcel and the program. We'll come back with a written feasibility memo before any design work starts.
Want a real number for your Single Family Home Builder job?
- We open the books on similar jobs from the last 24 months
- Hand-built estimate, not a software auto-quote
- Includes permits, finishes, and the boring stuff
3-day turnaround · Free