New Detached ADU in West Hollywood - One Fixed Price, Permits Handled

Fast, Reliable New Detached ADU Across West Hollywood

A new detached ADU in West Hollywood typically runs $320,000-$580,000 all-in, from the first site survey through final certificate of occupancy. Most projects take 8-14 months, with permitting through West Hollywood’s standalone Community Development Department adding 6-10 weeks compared to LA City’s fast-track system. Call (424) 523-8492 to schedule your free estimate - every project receives a written price before any work begins, per Haven Standard, Clause 1.

Call (424) 523-8492

We’re the New Detached ADU team at Ellery ADU Studio, and we’ve been designing, permitting, and building ADUs across Los Angeles County since 2015. Our crews serve West Hollywood locally, with dispatch and scheduling coordinated from our Los Angeles office. We know the difference between a project that sails through plan check and one that gets redlined for assumptions that work in LA proper but fail in WeHo’s independent municipality.

Why Ellery ADU Studio Van Nuys Is West Hollywood’s Preferred New Detached ADU Company

West Hollywood is not LA. It’s an independent city with its own planning department, its own building code interpretations, and its own timeline. Contractors who treat WeHo as an LA neighborhood routinely discover their drawings don’t match the checklist. We’ve built our reputation on reading that checklist correctly the first time.

Our 900+ ADUs since 2015 include detached units on some of West Hollywood’s tightest lots - the 1920s courtyard bungalows near Santa Monica Boulevard, the Spanish Colonial Revival duplexes in the Norma Triangle, the post-war stucco apartment buildings along Fountain Avenue. On every one, we delivered a written price before work started, a documented photo record on every visit, and a 365-Day Done Right Promise backed in writing. Nadia Ellery, our founder, reviews every permit set personally before submittal.

Response time matters when you’re holding a vacant lot or a teardown garage. We typically schedule site evaluations within 3-5 business days for West Hollywood properties. A live person answers calls 24/7 - no voicemail queue, no callback promise that doesn’t materialize.

We also offer a Free Second Opinion on any written estimate already in hand. Bring us another contractor’s scope and we’ll flag what’s missing, what’s optimistic, and what West Hollywood’s Community Development Department will actually require.

Our New Detached ADU Services in West Hollywood

Custom Built ADU

Custom built ADUs in West Hollywood typically run $380,000-$580,000 all-in. These are stick-framed, architect-designed structures tailored to your lot’s specific setbacks, your privacy needs from neighboring courtyard bungalows, and the aesthetic requirements of your particular block. On a recent project near Melrose Avenue, we designed a 520-square-foot 1-bedroom detached unit with a pitched roof to match the existing Spanish Colonial Revival main house - the Community Development Department required specific stucco texture matching and roof-tile profiles that a prefab system couldn’t replicate. Custom build means every fastener, every window frame, every joint system is specified for WeHo’s salt-laden basin air, not pulled from a standard inland kit.

Prefab ADU Installation

Prefab ADU installation in West Hollywood runs $320,000-$460,000 all-in, including site prep, foundation, utility tie-ins, and finish work. We specify and coordinate systems from Abodu, Cover, and other manufacturers - but we don’t just drop a box on your lot. WeHo’s standalone plan-check process means the manufacturer’s standard engineering package often needs supplemental drawings for local wind-load and seismic requirements. Our design-build model handles both: we adapt the prefab shell to West Hollywood’s checklist, then warrant the result under our single contract. For properties near busy corridors like Santa Monica Boulevard or La Cienega, we also specify upgraded acoustic packages that standard prefab specs don’t include.

Modular ADU

Modular ADUs in West Hollywood typically fall between prefab and custom at $340,000-$480,000. These are factory-built modules craned into place and finished on site - faster than stick-built, more flexible than single-unit prefab. The constraint in WeHo is access: many lots have narrow driveways between existing structures, or overhead power lines that complicate crane placement. We evaluate this during our initial site survey and price the crane, the street closure permit, and the utility drop in writing, not as a surprise later. Our crews have set modular units on Norma Triangle lots where the only access was through a 10-foot alley - we measured twice, engineered the lift, and delivered on the original written price.

Studio ADU

Studio ADUs in West Hollywood - compact detached units, typically 350-450 square feet - run $320,000-$420,000 all-in. These make sense on the smaller lots common in WeHo’s 1.9-square-mile grid, where a full 1-bedroom would violate setback or lot-coverage limits. The challenge is Title 24 energy compliance: WeHo’s inland-basin position produces hotter summer afternoons than coastal West LA, so a studio without proper insulation and a dedicated mini-split will fail inspection and be unlivable. We specify aluminum-clad wood windows with marine-grade finish coats and sealed polymeric paver joints at the entry - details that cost more upfront than inland-spec vinyl and sand joints, but that don’t fail within eight years under salt-and-sun cycling.

1-Bed & 2-Bed ADU

Detached 1-bedroom ADUs in West Hollywood typically run $360,000-$480,000; 2-bedroom units run $440,000-$580,000. The 1-bedroom format is the most common request we see from West Hollywood homeowners - it maximizes rental income potential while fitting within the tight setbacks typical of 1920s-1950s lots. 2-bedroom units require more generous lot dimensions; we evaluate this against your specific parcel during the free estimate. Both formats trigger additional scrutiny if your property includes pre-1979 rental units, due to West Hollywood’s Rent Stabilization Ordinance. We structure these projects carefully to avoid unintended RSO relocation assistance and just-cause eviction requirements - a compliance layer that simply doesn’t exist one block away in LA proper.

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Trusted Brands We Service in West Hollywood

We specify and coordinate prefab and modular systems from Abodu, Cover, and Tuff Shed, integrating them into our single-contract design-build model. For site-built work, we use James Hardie fiber-cement siding with marine-grade finish systems on West Hollywood projects - the standard inland paint schedule fails within five years here. Our local supplier relationships mean we don’t wait on specialty fasteners or coated hardware; hot-dip galvanized post bases and stainless steel fasteners are stocked for our WeHo crews, not special-ordered mid-project. The price difference between coastal-spec and inland-spec materials is real - typically 12-18% on the framing and exterior package - but we quote it upfront, per Haven Standard, Clause 1, so you’re not choosing between quality and budget after work starts.

Common New Detached ADU Problems We See in West Hollywood Homes

• Salt-corroded fasteners and post bases. West Hollywood sits close enough to the marine layer that standard zinc-plated hardware on detached ADU decks, fence posts, and railings pits and bleeds rust within a few seasons. We specify hot-dip galvanized or stainless steel for every exterior connection - not as an upgrade, as the baseline.
• Builder-grade window frames failing under thermal and salt stress. Unsealed wood or vinyl window frames warp and lose their weather seal, which then drives up the mini-split load during WeHo’s hotter inland-basin summer afternoons. We specify aluminum-clad wood with marine-grade finish coats; they cost more, but they pass Title 24 and don’t need replacement in year eight.
• Paver joints opening under salt-and-sun cycling. Standard sand joints at the ADU entry and hardscape perimeter wash out and create trip edges. We set paver systems with sealed polymeric joints from the start - a detail many inland-spec bids omit entirely.
• Assuming LA City’s permit process applies. Contractors fluent in LADBS over-the-counter ADU review routinely get sent back by West Hollywood’s Community Development Department for checklist items LA City waived. Detached ADU plans need WeHo-specific drawings, and lots with pre-1979 rentals hit the RSO compliance layer. We submit to WeHo’s system, not LA’s, because they’re different municipalities with different rules.

Pricing for New Detached ADU in West Hollywood, CA

We Also Serve Cities Near West Hollywood

Our crews work across the metro core, including West Hollywood and neighboring Beverly Hills, Studio City, North Hollywood, and Sherman Oaks. Each city has its own permit system, its own checklist, its own timeline - we know the difference and we price accordingly. Same written-price guarantee, same documented photo record, same 365-Day Done Right Promise.

FAQs - New Detached ADU in West Hollywood