Trusted New Detached ADU for West Hollywood Homeowners
Our New Detached ADU in West Hollywood typically costs $350,000-$650,000 all-in, from the first site survey through final inspection, depending on size, finish level, and whether you build custom or go prefab. Ellery ADU Studio has designed, permitted, and built over 900 ADUs since 2015, the year California’s ADU laws opened the door for detached units on single-family lots. Every project starts with a written price before any work begins, per Haven Standard Clause 1. Call (213) 329-7167 to schedule your free estimate.
West Hollywood’s zoning is unforgiving. Lots are small, setbacks are tight, and the city’s design review process adds a layer that neighboring Los Angeles doesn’t require. We’ve worked with West Hollywood’s Planning and Building Services on enough projects to know where the permit set commonly stalls, and we build that knowledge into the drawings before submission. Our clients receive a documented photo record on every site visit and a 365-Day Done Right Promise in writing. If the finished ADU doesn’t match the permitted drawings, we make it right.
What Our New Detached ADU Service Includes
Custom Built ADU
Custom built ADUs are stick-framed on your property from foundation to finish, designed to your specifications and the unique constraints of your lot. You need this when your West Hollywood lot has an unusual shape, a significant grade change, or you want finishes and a layout that prefab can’t accommodate. At Ellery ADU Studio, we produce the full permit set in-house, coordinate structural engineering, and build through our own crews under a single contract at a single written price. There’s no designer-versus-builder blame gap because we are both.
Prefab ADU Installation
Prefab ADUs are factory-built modules delivered to your site and craned onto a prepared foundation, cutting on-site construction time by 40-60%. This works well in West Hollywood when your access route can handle a wide-load delivery and you want to minimize months of active construction on a tight lot. We specify and coordinate prefab systems from brands including Abodu and Cover within the same single contract, handling site prep, utility tie-ins, and the final finish work that turns a delivered module into a permitted, inspected dwelling.
Modular ADU
Modular ADUs differ from prefab in their structural code compliance and transport certification, built to ICC or California HCD standards for repeated factory production. Choose modular when you want the speed of off-site construction with the financing and appraisal advantages of a permanent, code-compliant structure. Ellery ADU Studio coordinates modular manufacturers including Dvele, Mighty Buildings, and Boxabl, managing the interface between factory production schedules and West Hollywood’s inspection milestones so neither delays the other.
Studio ADU
Our New Detached ADU in Studio City follows the same pattern: a studio ADU is a single-room detached unit with a full kitchen and bath, typically 300-450 square feet, the most common footprint we see in West Hollywood where lot coverage limits bite hardest. You need this when your goal is rental income, a home office with separation from the main house, or guest quarters without the cost of a multi-room build. We optimize the permit set for maximum usable square footage within West Hollywood’s 16-foot height limit for detached ADUs and design the mechanical systems so a compact space doesn’t feel cramped.
1-Bed & 2-Bed ADU
One-bedroom and two-bedroom detached ADUs range from 450 to 1,200 square feet, requiring full kitchen, bath, and living area separation under California’s building code. These units command higher rents and suit homeowners planning long-term family use or aging-in-place scenarios. In North Hollywood and West Hollywood, where the median one-bedroom apartment rents for $2,800-$3,400, a well-designed 1-bed or 2-bed ADU can generate substantial returns. We model the pro forma with you during design, so the layout decisions are grounded in actual rental comps for your neighborhood.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Brands We Service for New Detached ADU
We’ve specified and coordinated Tuff Shed’s Backyard Shed-to-Studio conversions into full ADU permit sets, handling the structural upgrades, insulation, and utility rough-ins that transform a storage shell into a habitable dwelling. Our crews are fluent in James Hardie fiber-cement siding systems, which we specify on nearly every custom build for fire resistance and low maintenance in West Hollywood’s sun-exposed climate. We’ve also managed Abodu installations from foundation pour through final walkthrough, including the crane coordination and utility tie-ins that factory warranties don’t cover.
Whether you have Abodu, Cover, Tuff Shed, James Hardie, or any other system on your lot or in your plans, we can help. Our single-contract model means we don’t walk away when the module arrives. We stay through the finish work, the inspections, and the certificate of occupancy.
Before
AfterSigns You Need New Detached ADU Right Now
- Your mortgage payment has outpaced your income growth. West Hollywood homeowners who bought between 2015 and 2022 are seeing monthly housing costs consume 40-60% of income. A rented ADU can offset $2,500-$4,000 of that monthly burden, turning your property into a cash-flowing asset rather than a draining liability.
- Your aging parent needs proximity, not dependence. The cost of assisted living in West Hollywood exceeds $6,000 monthly. A detached 1-bed ADU keeps family close while preserving dignity and separate space. The permit set we produce accounts for accessibility features that are cheaper to build in than retrofit later.
- You work from home and your kitchen table is no longer cutting it. A studio ADU with dedicated electrical and data infrastructure creates a professional space that qualifies for home office deductions and separates work hours from domestic life. We’ve designed dozens of these for West Hollywood’s creative and tech professionals.
- Your lot sits underutilized while your property tax bill climbs. Proposition 13 limits tax increases on your primary residence, and California’s ADU laws prevent reassessment of the main house when you add a detached unit. The tax hit on the ADU itself is minimal compared to the rental income potential.
- You’ve received a notice of violation from the city. Unpermitted structures in West Hollywood face fines of $100 per day and mandatory demolition orders. If you’ve inherited a non-compliant backyard building, converting it to a permitted ADU is often cheaper than removal and reconstruction, and we can assess that path in our free estimate.
Our New Detached ADU Process - Step by Step
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Site Survey and Feasibility Study. We measure your lot, photograph existing conditions, and pull the assessor’s parcel map and any recorded easements. Within one week, you receive a written feasibility report showing your maximum allowable ADU size under West Hollywood’s zoning, any setback variances required, and a preliminary budget range. This report is yours whether or not you proceed.
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Design and Permit Set Production. Our architects produce construction drawings, structural calculations, and Title 24 energy compliance documentation in-house. The permit set is the core product, not an afterthought. We submit to West Hollywood’s Planning Division for design review, then to Building Services for plan check, and we track every correction cycle until approval.
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Written Price and Contract. Once the permit set is approved, we lock the scope and price in writing per Haven Standard Clause 1. No allowances that balloon later. No “we’ll figure it out in the field.” The contract specifies every material grade, every fixture model, and every labor line item. You sign once, at one written price.
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Construction and Documented Photo Record. Our background-checked, uniformed crews build on a scheduled timeline with documented photo records uploaded after every site visit. You see what was found and what was done, not a summary of how it felt. Foundation, framing, MEP rough-in, insulation, drywall, finish work, each phase inspected and photographed.
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Final Inspection and 365-Day Done Right Promise. We walk the finished ADU with you against the permitted drawings, note any punch list items, and schedule final inspection with the city. Once the certificate of occupancy issues, your 365-Day Done Right Promise activates. If anything doesn’t match what was permitted and contracted, we make it right in writing.
How Much Does New Detached ADU Cost in West Hollywood?
See our New Detached ADU cost guide: a typical custom built studio ADU in West Hollywood runs $350,000-$450,000 all-in, including design, permitting, and construction. A 1-bedroom custom unit typically lands at $400,000-$550,000, and a 2-bedroom at $500,000-$650,000. Prefab and modular options can reduce that range by 10-20% on the construction side, though site prep, foundation, and utility costs remain similar across methods.
Several factors push these numbers up or down. Your lot’s slope determines foundation complexity. A flat lot with standard soils might see a $25,000 foundation line item. A sloped lot requiring retaining walls and engineered piers can add $75,000-$120,000. Finish level matters equally. Mid-grade appliances, LVP flooring, and quartz countertops keep costs controlled. Imported tile, custom cabinetry, and smart home systems add proportionally. West Hollywood’s design review fees and school district fees add roughly $8,000-$15,000 that Los Angeles doesn’t charge.
To avoid overpaying, get a written line-item quote from any firm you’re considering. Compare not just the bottom number but what’s included. Does the quote cover the full permit set, or will you pay an architect separately? Are utility tie-ins itemized, or buried in a “general conditions” allowance? Under Haven Standard Clause 5 (No Surprises), our scope is locked at signing. No door-side upsells, no scope creep.
Our free estimate includes the site survey, feasibility report, and preliminary permit timeline. You’ll know whether your project is viable before you spend a dollar on design.
New Detached ADU Near West Hollywood - Our Service Area
We design, permit, and build detached ADUs throughout West Hollywood and the surrounding metro core, including New Detached ADU in Studio City, New Detached ADU in Los Angeles, North Hollywood, Culver City, Sherman Oaks, Burbank, Santa Monica, Van Nuys, Westchester, Inglewood, and Glendale. Typical permitting timelines vary by jurisdiction. West Hollywood’s design review adds 6-10 weeks compared to Los Angeles, which we build into every project schedule. Most clients in our service area receive their feasibility report within one week of the initial site survey.
Serving West Hollywood, CA - Our Local Coverage Area
We’re based in the West Hollywood area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions - New Detached ADU in West Hollywood
A new detached ADU is a separate, freestanding residential unit built on the same lot as an existing single-family or multi-family home, with its own kitchen, bathroom, and living space. In West Hollywood, detached ADUs must comply with the city’s specific setback, height, and lot coverage requirements, which are stricter than California’s statewide defaults. Ellery ADU Studio handles the full process from permit set through final inspection under one contract at one written price.
Most new detached ADUs in West Hollywood take 12-18 months from initial site survey to certificate of occupancy. Design and permitting typically consume 6-9 months, with West Hollywood’s design review adding 6-10 weeks compared to neighboring jurisdictions. Construction runs 4-6 months for custom builds and 2-4 months for prefab or modular units once the foundation is ready. Call (213) 329-7167 for a timeline specific to your lot.
Custom studio ADUs in West Hollywood typically cost $350,000-$450,000 all-in, 1-bedroom units $400,000-$550,000, and 2-bedroom units $500,000-$650,000. Prefab and modular options can reduce construction costs by 10-20%, though site prep and foundation costs remain consistent. Every Ellery ADU Studio project receives a written price before any work begins, per Haven Standard Clause 1. Call (213) 329-7167 for your free estimate.
Yes. We specify and coordinate prefab and modular systems from Abodu, Cover, Dvele, Mighty Buildings, Boxabl, Plant Prefab, Tuff Shed, and James Hardie within our single-contract model. This includes site prep, foundation design, crane coordination, utility tie-ins, and finish work that factory warranties don’t cover. Whether your plans include Abodu or another system, we manage the full project to certificate of occupancy.
We do not offer emergency construction services, as ADU projects are planned builds, not urgent repairs. However, a live person answers our phones 24/7 to schedule site surveys, discuss feasibility questions, or provide a Free Second Opinion on any written estimate you already have in hand. For urgent structural or safety issues with an existing structure, we recommend contacting a licensed emergency contractor and then engaging us for the permitted rebuild.
Every new detached ADU is backed by our 365-Day Done Right Promise: if the finished unit is not built to the permitted drawings and contracted scope, we make it right in writing. This is separate from and in addition to manufacturer warranties on appliances, fixtures, and prefab modules. You receive the promise in writing before construction starts, not as a verbal assurance after completion.
Gather your property’s assessor parcel number, any existing survey or site plan, and your rough budget range. Note any known easements, utility locations, or neighborhood covenants. If you have an existing structure in the backyard, photograph it from multiple angles. We’ll handle the rest during the site survey, including measuring, photographing, and pulling relevant records. Call (213) 329-7167 to schedule. Estimates are free, written, and include a feasibility report you keep regardless of your decision.
Schedule Your New Detached ADU Service in West Hollywood Today
Call (213) 329-7167 to schedule your free estimate. You’ll receive a site survey, feasibility report, and preliminary permit timeline at no charge. Every project is quoted with a written price before any work begins, backed by The Haven Standard and our 365-Day Done Right Promise. A live person answers our phones 24/7.
Written by Nadia Ellery, Owner at Ellery ADU Studio, serving West Hollywood since 2015.