Building an ADU in Tarzana. Rules, costs, timeline.
What LAMC § 12.22.A.33 allows on a Tarzana lot, why the neighborhood's deep parcels are built for backyard homes, and what an all-in build costs in 2026.
What you can build — at a glance
Reviewed by CALI ADU’s ADU specialists · June 2026
- Max ADU size
- 1,200 sqft detached · 50% of primary (attached, 800 sqft state floor)
- Detached height
- Per zoning district (typ. 28–45 ft on residential lots) · 2 stories permitted (LAMC 12.22.A.33(d)(2))
- Attached height
- Up to 25 ft or primary dwelling’s zoning height (Gov. Code § 66321(b)(4)(D))
- Side & rear setbacks
- 4 ft (Gov. Code § 66314(d)(7))
- Units per SFR lot
- Up to 3: conversion ADU + JADU + new detached ≤800 sqft (Gov. Code § 66323; HCD Handbook). LAMC defaults to 1 ADU + 1 JADU — state law preempts.
- Parking required
- None on many Tarzana lots (half-mile transit exemption, Gov. Code § 66322) — confirmed per lot in ZIMAS
- Permit timeline
- 60 days · ministerial review, no hearing (Gov. Code § 66317)
- Hillside & fire-zone lots
- A lot in both a Hillside Area and a VHFHSZ needs sprinklers, 1 off-street space, and 20-ft roadway frontage (LAMC § 12.22.A.33)
- Detached Up to 1,200 sqft · 2 stories permitted (28–45 ft by zone)
- Attached Up to 25 ft or zoning height
- Junior ADU Up to 500 sqft inside primary dwelling
- Conversion Existing accessory structure to ADU
- Exemption ADU 800 sqft / 16 ft state floor (Gov. Code § 66323)
Per LAMC § 12.22.A.33 and Gov. Code §§ 66310–66342. Tarzana is in the City of Los Angeles — permits run through LADBS. Cross-checked against the HCD ADU Handbook (March 2026). Citywide rules in full on our Los Angeles ADU guide.
On this page
Who permits ADUs in Tarzana
Tarzana is a neighborhood of the City of Los Angeles — not its own city. Every ADU here is permitted by the Los Angeles Department of Building and Safety under LAMC § 12.22.A.33, the city’s ADU ordinance, sitting on top of California state law (Gov. Code §§ 66310–66342). The same ordinance covers Woodland Hills next door and Encino across Lindley — what changes from neighborhood to neighborhood is the overlay map and the lots themselves.
The citywide rules — sizes, setbacks, height, parking, and the places state law overrides LA’s ordinance — are covered in depth in our Los Angeles ADU guide. The snapshot above is the Tarzana summary. The rest of this page covers what’s specific to these lots.
What’s different here: deep lots, then the fire zone
Tarzana’s defining feature isn’t an overlay — it’s the parcels. Everything in this section is grounded in LAMC § 12.22.A.33 and state law where it preempts — we cite the state sections inline. Your parcel’s exact overlays are on its ZIMAS report; we pull that report for every lot we review.
Deep parcels, generous envelopes
The blocks south of Ventura Boulevard were subdivided from ranch land, and many parcels kept ranch proportions — deep, often gated lots that run well back from the street. Depth is exactly what an ADU wants: the unit sits behind the house with real separation, the 4-ft side and rear setbacks (Gov. Code § 66314(d)(7)) are easy to clear, and there’s no neighborhood floor-area district to squeeze the math — the Studio City RFA District (Ordinance No. 182,048) is far east, and no HPOZ covers Tarzana (LA City Planning, adopted HPOZ list). State law guarantees an 800 sqft, 16-ft ADU on any single-family lot regardless of coverage limits (Gov. Code § 66321(b)(3)); on lots this deep, the full 1,200 sqft envelope usually fits with yard left over.
The canyons: hillside and fire-zone rules
Climb past the country clubs toward Mulholland and the overlay map changes. Large portions of the canyon terrain sit in LA’s Hillside Area, and many lots are also in a Very High Fire Hazard Severity Zone — both layers show on a parcel’s ZIMAS report. Under LAMC § 12.22.A.33, a lot in both zones can host an ADU only if the property has a fire sprinkler system, one off-street parking space, and at least 20 feet of roadway width along the frontage. One zone alone doesn’t trigger the restriction. Hillside lots also bring grading and structural engineering into the design. That’s why we check the overlay status of a lot before anything else.
The lots: built deep, made for backyards
Tarzana started as Edgar Rice Burroughs’ ranch in the 1920s, and the subdivision pattern still shows it. South of the Boulevard, ranch homes and Spanish-style houses sit on deep parcels along quiet cul-de-sacs and gated drives. North of Ventura toward Victory, the lots run flatter and more uniform — postwar tract homes with long driveways and detached rear garages.
Either way, the layout gives you three paths. The most valuable on most lots: keep the garage for parking and storage and add a new detached ADU in the deep part of the yard, with the driveway already handling access. If space is tighter, the garage converts — or comes down for a new detached unit in its footprint. Parking rarely decides the project. Many Tarzana lots qualify for the half-mile transit parking exemption (Gov. Code § 66322) along the Ventura corridor, and we confirm your lot’s status in ZIMAS during the Backyard Review.
Permitting your ADU through LADBS
ADU review in Los Angeles is ministerial: LADBS checks your plans against the code, with no hearing and no neighbor sign-off. Once your application is complete, the city has 60 days to approve or deny it — miss the deadline and the application is deemed approved (Gov. Code § 66317). The city must also confirm completeness in writing within 15 business days (SB 543, effective January 1, 2026).
For a Signature Home, the permit step runs in weeks, not months. Our plans are pre-engineered, so plan check is a conformance review, not a from-scratch evaluation. Plan preparation takes about two weeks; construction runs four to six months depending on model size, and the construction schedule is guaranteed in writing with a daily penalty if we miss the contracted finish date. Start to finish — design through move-in — plan on roughly six to nine months. Custom designs are slower: bespoke architecture adds design time up front, and the city reviews those drawings for the first time. Design, permitting, and construction management run under one contract.
One Tarzana-specific note: canyon lots toward Mulholland add soils and structural engineering to the design phase. We scope that work during the lot review so it’s in the plan — and the price — before you commit.
Signature Homes that fit Tarzana lots
Three picks for this neighborhood. The Sunset is the impact-fee-exempt entry point for a first rental unit. The Melrose lands exactly on the 800 sqft state-protected size with two bedrooms and two baths. The Venice puts 1,080 sqft on a two-story footprint when you want maximum rent and minimum yard loss.
The Sunset
1 BR / 1 BA · 480 sqft
$239,000 all-inclusive iFixed contract price for the Signature Home on a standard lot. Site-specific work — soil reports, utility routing, driveway, retaining walls — is identified and priced upfront, before you sign.
See model →
The Melrose
2 BR / 2 BA · 800 sqft
$329,000 all-inclusive iFixed contract price for the Signature Home on a standard lot. Site-specific work — soil reports, utility routing, driveway, retaining walls — is identified and priced upfront, before you sign.
See model →
The Venice
2 BR / 2 BA · 1080 sqft · 2-story
$399,000 all-inclusive iFixed contract price for the Signature Home on a standard lot. Site-specific work — soil reports, utility routing, driveway, retaining walls — is identified and priced upfront, before you sign.
See model →Recent CALI ADU work nearby
Builds from the neighborhoods around Tarzana — next door in Woodland Hills, north in Reseda, and across the Valley.
What an ADU costs in Tarzana (2026)
Tarzana construction pricing is City of LA pricing — there’s no neighborhood premium on permits, only on the dirt. Industry-wide, detached ADUs in Los Angeles run roughly $350 to $550 per square foot, and canyon lots push toward the top of that range once engineering and access are priced in.
CALI ADU works differently: nine Signature Homes, each at a fixed, all-inclusive price — design, permits, construction, and finishes — from $219,000 to $459,000. The number we give you for your lot is the number you pay. Fees are part of that number, not an add-on: LADBS permit and plan-check fees are valuation-based, and state law exempts ADUs of 750 sqft or less (interior livable space) from development impact fees entirely, with larger units charged only proportionally (Gov. Code § 66311.5(c)).
Renting your ADU: long-term by design
Set short-term rental aside first: LA’s Home-Sharing Ordinance (No. 185,931) limits registration to a host’s primary residence, and ADUs permitted after January 1, 2017 aren’t eligible. A new Tarzana ADU is a long-term rental product — which is where the durable income is anyway.
The conservative floor: HUD’s FY2026 Fair Market Rents for the Los Angeles–Long Beach–Glendale metro are $2,085 for a one-bedroom and $2,601 for a two-bedroom ($1,863 studio, $3,298 three-bedroom). Those are metro-wide figures that include decades-old apartment stock — you won’t find a new detached ADU in Tarzana at those prices. New construction rents at a premium to the HUD benchmarks, and Tarzana’s demand base is steadier than most: Providence Cedars-Sinai Tarzana Medical Center anchors a year-round pool of medical renters, and the Ventura corridor and the 101 carry everyone else. Most clients see the project pay for itself within 7 to 12 years; the two-bedroom plans get there fastest.
Why Tarzana is a strong ADU market
Tarzana’s lots were drawn for a different era, and that — more than any rule — is the opportunity. Deep parcels take a full-size detached unit without crowding the house, the pool, or the privacy that south-of-the-Boulevard buyers paid for. The hospital anchors rental demand, and multigenerational use fits the neighborhood’s character: a parents’ unit or an adult kid’s place at the back of the lot, with real separation between front and back doors.
The regulatory picture is as clean as the south Valley gets: no floor-area district, no historic district, ministerial review on a 60-day clock, and parking exemptions on many lots. The one real constraint — hillside and fire-zone engineering in the canyons — is exactly the kind a fixed-price, pre-engineered product is built to absorb.
Your ADU questions, answered
The questions Tarzana homeowners actually ask before they start — with citations to LAMC § 12.22.A.33 and Gov. Code §§ 66310–66342.
Does Tarzana have its own ADU rules?
No. Tarzana is a neighborhood of the City of Los Angeles, so every ADU is permitted by the Los Angeles Department of Building and Safety under LAMC § 12.22.A.33 plus California state law (Gov. Code §§ 66310–66342). ADU review is ministerial — no hearing, no discretionary review, and a 60-day decision clock under Gov. Code § 66317.
How big can an ADU be in Tarzana?
Up to 1,200 square feet for a detached ADU under LA’s ordinance; an attached ADU can reach 50% of the primary home’s size. State law sets floors a city can never cut below: 850 sqft for a one-bedroom, 1,000 sqft for two or more bedrooms, and an 800 sqft ADU must be allowed on any single-family lot regardless of floor-area or coverage limits (Gov. Code §§ 66321(b)(2)–(3)). On Tarzana’s deep lots, the full 1,200 sqft envelope usually fits with yard left over.
Can I build an ADU on a hillside lot south of Ventura Boulevard?
In most cases, yes. The restriction under LAMC § 12.22.A.33 applies to lots that sit in both a Very High Fire Hazard Severity Zone and a Hillside Area: those lots need a fire sprinkler system, one off-street parking space, and at least 20 feet of roadway width along the frontage. If your lot is in one zone but not both, the restriction doesn’t apply. Check your parcel in ZIMAS or send us the address — we check it during the Backyard Review.
Can I build a two-story ADU in Tarzana?
Yes. In the City of Los Angeles, detached ADU height follows the zoning district’s height limit — typically 28 to 45 feet on residential lots — and two stories are permitted (LAMC 12.22.A.33(d)(2)). State law separately guarantees minimum height floors (Gov. Code § 66321(b)(4)). On a deep Tarzana lot, a two-story plan like our 1,080 sqft Venice earns two-bedroom rent on a compact footprint.
Can I rent my Tarzana ADU on Airbnb?
No. LA’s Home-Sharing Ordinance (No. 185,931) limits short-term rental registration to a host’s primary residence, and ADUs permitted after January 1, 2017 aren’t eligible. A new Tarzana ADU is a long-term rental product — which is where the durable income is anyway.
How much rent can a Tarzana ADU earn?
Use HUD’s FY2026 Fair Market Rents as the conservative floor: $1,863 for a studio, $2,085 for a one-bedroom, $2,601 for a two-bedroom, and $3,298 for a three-bedroom in the Los Angeles–Long Beach–Glendale metro. Those are metro-wide figures that include decades-old apartment stock. A new detached ADU in Tarzana — with Providence Cedars-Sinai Tarzana Medical Center anchoring local rental demand — rents at a premium to those benchmarks.
Does a JADU require owner-occupancy?
Only sometimes, as of 2026. AB 1154 (effective January 1, 2026) amended Gov. Code § 66333(b) so JADU owner-occupancy is required only when the JADU shares a bathroom with the primary dwelling. A JADU with its own bathroom no longer triggers the owner-occupancy requirement under state law, even where older local summaries still describe the broader pre-2026 rule. Regular ADUs never require owner-occupancy (Gov. Code § 66315).
Is Tarzana in a historic district (HPOZ)?
No. The City of Los Angeles maintains roughly three dozen Historic Preservation Overlay Zones, and none covers Tarzana — the only Valley HPOZs are Balboa Highlands, Stonehurst, and Van Nuys (LA City Planning, adopted HPOZ list). There’s no neighborhood floor-area district either. Your ADU gets standard ministerial review.
ADU building nearby
CALI ADU builds across the City of Los Angeles and neighboring cities. Citywide rules: Los Angeles ADU guide. Next door: Woodland Hills to the west and Encino to the east — same ordinance, different lots. Further along the Boulevard: Sherman Oaks and Studio City.
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