$15K–$28K full ducted system. Rebates net $4K–$8K.

$5K–$8K installed. One head per room.

Los Angeles HVAC & Heat Pumps

LA HVAC — central AC upgrades, heat pump conversions, ductless mini-splits for ADUs. Title 24, HERS testing, SCE/SoCalGas rebates.

Start a Los Angeles project →Back to Los Angeles studio

Scope of work.

Manual J load calc
Permit
Equipment install
Ductwork + register
HERS test + commission

What changes about this in Los Angeles.

LADBS mech permit.
Title 24 + HERS.
SCE/SoCalGas rebate up to $4K.

Los Angeles cost band — 2026

$8K – $28K

Mini-split bottom; full ducted heat pump top.

Los Angeles timeline

2–4 days mini-split; 1–2 weeks ducted system.

How we think about this work in Los Angeles.

Structural work is the most expensive thing you can do badly and the cheapest thing you can do right. A correctly engineered shear wall, hold-down, or beam costs a few hundred dollars more than the wrong one and protects the building for its remaining life. We refuse to deviate from a stamped engineer's calc — the engineer's stamp is what protects the homeowner in a claim, not the contractor's experience.

California's seismic code has changed dramatically since 2010 and again since 2020 — most homes built before 1980 carry latent risk we can correct in a single retrofit pass. We treat foundation, framing, and shear as one system, never as separate trades.

The schedule, written out.

Every project varies, but the cadence below holds for most hvac & heat pumps jobs in Los Angeles. We publish it on purpose — the schedule is the contract.

Week 0
Engineering site visit
Licensed structural engineer reviews existing, soils, slope, snake-camera at foundation cracks.
Week 1–4
Engineering + plans
Stamped calcs, framing plan, hold-down + shear schedule, foundation detail.
Week 4–8
Permit
City structural review — usually faster than full ADU plan check.
Week 8–10
Foundation + shear access
Selective demo, crawlspace prep, excavation if underpinning.
Week 10–14
Install
Anchor bolts, hold-downs, shear panels, cripple-wall bracing, structural framing, beam install.
Week 14–15
Inspection
Inspector verifies every hold-down and shear-nail pattern — common rejection point if subs cut corners.

Materials & assemblies.

These are the defaults we write into the contract before you change a thing. They're the floor, not the ceiling — every spec can be upgraded; none should be downgraded without a serious reason.

Component	Default spec	Why
Anchor bolts	5/8" Simpson Titen HD or equivalent epoxy-set, 7" embed minimum	Old square-washer ½" bolts are not enough; full retrofit upsizes them.
Hold-downs	Simpson HDU or PHD with stamped placement at all shear-wall ends	Placement is the failure mode — wrong stud or wrong end = no hold-down at all.
Shear panels	15/32" structural-1 sheathing, 8d common nails @ 4"/12" or per calc	Air nails at the wrong PSI under-drive — every nail must be flush, not over.
Beams (LVL / PSL)	Engineered lumber per calc, with stamped connection hardware	Field-fabricated steel saddles are a frequent failure point — only use stamped connectors.
Foundation repair	Helical piles, push piers, or wide footings depending on soil + load	Choice is geotech-driven, not contractor-preference.

Hidden costs we flag up front.

A Los Angeles project budget that ignores the items below is a budget that will go over. We surface them in the first walk-through — not after a wall is open.

Line item	Range	When it hits
Soils / geotech report	$4K–$12K	hillside, expansive clay, or new addition load
Excavation + shoring	$8K–$40K	underpinning a settled foundation
Plumbing + electrical re-route	$2K–$10K	foundation work cuts through existing services
Temporary support	$2K–$8K	interior shoring for beam install

Why building in Los Angeles is its own thing.

Climate & building stock

Greater Los Angeles is a warm-summer Mediterranean climate (Köppen Csa) with long dry summers, Santa Ana wind events, brushfire exposure on the WUI, and an annual rainfall window concentrated between November and March. Building stock skews to single-story stucco bungalows, post-war ranches, and 1960s–80s wood-frame on raised perimeter or slab — many of which were built before today's Title 24 envelope and ventilation rules.

Seismic & soils

LA sits on the Newport-Inglewood, Santa Monica, Hollywood, and Sierra Madre fault systems. Soft-story apartments and pre-1980 cripple-wall single-family homes are the two biggest seismic liabilities; the Soft-Story Mandatory Retrofit Program (Ordinance 183893) is the framework most multifamily clients deal with, and FEMA P-50 / Brace+Bolt is the standard for single-family.

Code & amendments

City of LA uses the 2023 California Building Code / CRC / CMC / CPC / CEC + 2022 Title 24 Part 6, layered with LA-specific amendments and the LA Green Building Code. ADU rules follow LAMC §12.22 A.33 plus statewide AB 671 / SB 9 / SB 1211 updates current for 2026.

Jurisdictions we permit in

City of Los Angeles — LADBS (most of the basin)
LA County Public Works — Building & Safety (unincorporated)
Beverly Hills, Santa Monica, Culver City, Pasadena, Glendale, Burbank — independent building departments
Long Beach Development Services + South Bay coastal cities
Hillside Ordinance review for many Westside / Hollywood Hills parcels

Plan-check turnaround: 8–14 wk standard, 3–4 wk Express
Building-permit fee basis: ≈ 1.1–1.6% of valuation
School-facility fee (Level 1): $5.17 / sqft residential — 2026
Sewer-capacity charge: $3,800–$7,200 per new unit
Typical ADU all-in: $320K–$520K

What the city charges before we lift a hammer.

Fee / soft cost	Range	Trigger
Building permit + plan check (LADBS)	$4K–$14K	scales with construction valuation
School-facility fee (LAUSD or local)	$5.17/sqft new conditioned area	additions + ADUs only
Sewer-capacity charge (LASAN)	$3.8K–$7.2K per new dwelling	new unit creating a sewer connection
DWP service upgrade (200A → 400A)	$6K–$22K	heat pump + EV + ADU combined load
Arts development fee	0.4% of project cost	≥ $500K valuation, single-family
Geotech / soils report	$3.5K–$9K	hillside, expansive soils, deep additions
Surveyor for setbacks / ALTA	$2.5K–$6K	close-to-line ADUs, lot splits

Los Angeles — inspection cadence

From permit to occupancy.

1.Pre-construction: permit issued, NOC posted, dust + erosion control set
2.Underground: plumbing + electrical + grounding before slab pour
3.Foundation: rebar + hold-downs + anchor bolts before concrete
4.Framing: rough framing + shear nailing + strap inspection (often combined)
5.Rough MEP: rough electrical, plumbing top-out, mechanical, T-24 envelope verification
6.Insulation + drywall: HERS verification of duct leakage + envelope tightness
7.Final: building, electrical, plumbing, mechanical, planning — same-day clustering preferred

Los Angeles — how locals fund this

Financing instruments.

HELOC against primary residence — most common ADU funding (60–80% CLTV)
Cash-out refinance — preferred when current first mortgage rate is above market
Renovation construction loan (one-time-close 7/1 ARM)
RenoFi / ADU-specific second loans — based on after-completion appraisal
Property-tax-assessed PACE financing for HVAC, panel, envelope upgrades

cheaper alternatives & their tradeoffs

What we'd consider — and what we wouldn't.

Brace-only retrofit (no bolt-down)
Half the cost but only addresses cripple-wall, not sill movement — incomplete protection.
Carbon-fiber wall repair
Works for crack stabilization but doesn't add capacity for new load.
Owner-permit structural work
Not legal in most CA jurisdictions for residential — requires licensed contractor + engineer.

pitfalls — what we fix on takeover jobs

Mistakes to avoid.

Pulling a permit without an engineer's stamp — almost every city now requires it for shear / beam / foundation
Cutting a notch in a joist or beam to fit plumbing — single most common code failure on rough inspection
Skipping the cripple-wall bracing on a pre-1980 raised foundation — biggest cost-to-benefit retrofit available
Believing 'the inspector will catch it' — the inspector verifies what's exposed, not what's already buried
Skipping a soils report on hillside lots — Hillside Ordinance triggers caissons and import fill that double foundation cost
Under-sized service panels — most pre-1990 homes are 100A, not enough for ADU + heat pump + EV
Mis-reading R1 vs R1V1 zoning — height + FAR rules vary by hillside designation
Ignoring the LADWP separate-meter rule when renting the ADU long-term
Building over a sewer easement — requires LASAN encroachment letter before plan check

In short.

LA heat pump cost?: $15K–$28K full ducted system. Rebates net $4K–$8K.
Mini-split for ADU?: $5K–$8K installed. One head per room.

Los Angeles areas we cover.

More of what the Los Angeles studio builds.

Got a Los Angeles project in mind?

Send us the address. We’ll pull zoning, setbacks, and feasibility before you spend money on drawings — and the inquiry routes straight to the Los Angeles desk.

Start a Los Angeles project →