Building an ADU in Sherman Oaks. Rules, costs, timeline.
What LAMC § 12.22.A.33 allows on a Sherman Oaks lot, how the hillside and fire-zone rules change the math south of Ventura Boulevard, 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 Sherman Oaks 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. Sherman Oaks 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 Sherman Oaks
Sherman Oaks 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). Cross Coldwater Canyon Avenue into Studio City or the 405 into Encino and the same ordinance applies — what changes is the overlay map.
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 Sherman Oaks summary. The rest of this page covers what’s specific to these lots.
What’s different here: the hills and the fire zone
One overlay does most of the work in Sherman Oaks, and Ventura Boulevard is the dividing line. 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.
South of the Boulevard: hillside and fire-zone rules
Sherman Oaks has one of the deepest hillside sections in the Valley. The canyon streets climb from Ventura Boulevard all the way to Mulholland Drive, through Longridge Estates and the canyon corridors. Large portions of that 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.
What Sherman Oaks doesn’t have
Two constraints that complicate ADU math in neighboring areas stop at the Sherman Oaks line. There’s no neighborhood floor-area district: the Studio City RFA District (Ordinance No. 182,048) covers Studio City only, so Sherman Oaks lots follow the citywide single-family floor-area rules instead — and state law guarantees an 800 sqft, 16-ft ADU with 4-ft setbacks regardless of any floor-area, coverage, or open-space limit (Gov. Code § 66321(b)(3)). And there’s no historic district: none of LA’s Historic Preservation Overlay Zones covers Sherman Oaks — the only Valley HPOZs are Balboa Highlands, Stonehurst, and Van Nuys (LA City Planning, adopted HPOZ list). On the flats, that leaves the cleanest ADU path in the south Valley.
The lots: big flats, deep hills
The Sherman Oaks flats — between Ventura Boulevard and Magnolia, from the 405 east toward Coldwater Canyon — carry postwar ranch homes on some of the larger lots in the south Valley, typically in the 6,500-to-8,000 sqft range. Long driveways end at a detached rear garage. That layout gives you three paths. The most valuable on most lots: keep the garage for parking and storage and add a new detached ADU beside it, with the driveway already handling access. If space is at a premium, or you want the full yard back, the garage converts — or comes down for a new detached unit in its footprint. Parking rarely decides the project. Many Sherman Oaks lots qualify for the half-mile transit parking exemption (Gov. Code § 66322), and we confirm your lot’s status in ZIMAS during the Backyard Review.
South of the Boulevard, the lots climb fast. Upslope and downslope parcels need engineering that flat lots don’t, and the fire-zone rules above apply to much of the terrain. ADUs get built in these hills — but the right answer is usually a compact single-story plan placed where the lot is already level. On the flats, the full lineup is in play, including two-story plans that keep the yard.
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 Sherman Oaks-specific note: hillside lots south of the Boulevard 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 Sherman Oaks lots
Three picks for this neighborhood. The Melrose lands exactly on the 800 sqft state-protected size. The Lincoln puts three bedrooms on one story for the big flats lots. The Culver — 1,200 sqft over two stories — is the flagship for lots where you want maximum rent and minimum footprint.
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 Lincoln
3 BR / 2 BA · 1000 sqft
$389,000 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 Culver
3 BR / 2.5 BA · 1200 sqft · 2-story
$459,000 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 around the Valley
Builds from the neighborhoods around Sherman Oaks — north up the 405 corridor and over the hill.
What an ADU costs in Sherman Oaks (2026)
Sherman Oaks 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 hillside 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 Sherman Oaks 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 Sherman Oaks at those prices. New construction rents at a premium to the HUD benchmarks, and Sherman Oaks sits well above the metro average to begin with: the 405/101 crossroads puts the Westside, the studios, and the whole Valley within commuting reach, and Ventura Boulevard’s restaurant and office corridor keeps renter demand deep. Most clients see the project pay for itself within 7 to 12 years; the two- and three-bedroom plans get there fastest.
Why Sherman Oaks is a strong ADU market
Sherman Oaks pairs some of the south Valley’s largest flats lots with premium land values and a renter pool that commutes in every direction from the 405/101 junction. The lot sizes mean the full lineup fits — including the 1,000 sqft Lincoln and the 1,200 sqft two-story Culver — and an ADU here adds appraised value on top of rent. A guest house or family unit carries its weight even if you never rent it.
The regulatory picture is cleaner than most neighbors’: 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 south of the Boulevard — is exactly the kind a fixed-price, pre-engineered product is built to absorb.
Your ADU questions, answered
The questions Sherman Oaks homeowners actually ask before they start — with citations to LAMC § 12.22.A.33 and Gov. Code §§ 66310–66342.
Does Sherman Oaks have its own ADU rules?
No. Sherman Oaks 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.
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.
Does Sherman Oaks have a floor-area district like Studio City's?
No. The Studio City Residential Floor Area District (Ordinance No. 182,048) stops at the Studio City boundary — no neighborhood RFA district covers Sherman Oaks. The citywide single-family floor-area rules (the Baseline Mansionization Ordinance) apply instead, and state law guarantees an ADU of at least 800 square feet regardless of any floor-area, lot-coverage, or open-space limit (Gov. Code § 66321(b)(3)). We confirm your lot’s exact overlays in ZIMAS.
Can I build a two-story ADU in Sherman Oaks?
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 the Sherman Oaks flats, a two-story plan like our 1,200 sqft Culver adds three bedrooms while keeping most of the yard.
Can I rent my Sherman Oaks 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 Sherman Oaks ADU is a long-term rental product — which is where the durable income is anyway.
How much rent can a Sherman Oaks 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 Sherman Oaks — a premium rental neighborhood at the 405/101 crossroads — 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 Sherman Oaks in a historic district (HPOZ)?
No. The City of Los Angeles maintains roughly three dozen Historic Preservation Overlay Zones, and none covers Sherman Oaks — the only Valley HPOZs are Balboa Highlands, Stonehurst, and Van Nuys (LA City Planning, adopted HPOZ list). Your ADU gets standard ministerial review with no historic-board step.
ADU building nearby
CALI ADU builds across the City of Los Angeles and neighboring cities. Citywide rules: Los Angeles ADU guide. Next door: Studio City — same ordinance, plus its own floor-area district — and across the 405, Encino. West along the Boulevard: Woodland Hills and Tarzana. Across the hills: Burbank, an independent city with its own rules.
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