ADU in West Hollywood, CA
Junior ADU & Interior Conversion in West Hollywood typically runs $85,000-$165,000 all-in, drawings through final inspection, with most projects requiring full electrical and mechanical upgrades due to pre-1970s building stock. ADU Site Prep & Utilities in West Hollywood usually adds $25,000-$75,000 to any project, driven by 60-amp panel replacements and gas lateral extensions common on Ogden Drive and Laurel Avenue bungalow courts. Call (213) 329-7167 to schedule your free estimate.
Ellery ADU Studio has operated as a design-build studio since 2015, the year California’s ADU laws began their major shift. We handle Junior ADU & Interior Conversion and ADU Site Prep & Utilities as single-contract, single-written-price projects - no designer-versus-builder blame gap. Our Los Angeles office coordinates dispatch and scheduling; crews serve West Hollywood locally.
Why West Hollywood Homes Are Different
West Hollywood is an independent city, not part of Los Angeles, with its own planning department and its own ADU ordinance. Any lot with rent-stabilized units must navigate WeHo’s Rent Stabilization Ordinance before permitting - a layer that doesn’t exist one block east in the City of LA. Contractors who only know LADBS rules get blindsided by WeHo’s Community Development Department process.
The housing stock is almost entirely pre-1970s: Spanish bungalow courts from the 1930s, two-story stucco apartment buildings from the 1950s, and single-car garages behind small-lot bungalows. Original 60-amp panels, uninsulated walls, and slab-on-grade floors are standard. Dense infill means side-yard ADUs receive minimal natural light and cross-ventilation, pushing most projects toward mechanical HVAC even in LA’s mild climate. WeHo also applies design-compatibility review, so plans that pass LADBS can come back requiring facade revisions to match surrounding Spanish Colonial Revival streetscapes.
Our Main West Hollywood Services
West Hollywood homeowners call us most often for these three services:
ADU Design & Permitting in West Hollywood
WeHo’s Community Development Department requires permit sets that account for local RSO implications and design-compatibility review, not just state ADU law. Our permit set includes RSO clearance documentation and facade materials matched to surrounding bungalow courts. ADU Design & Permitting in West Hollywood is priced as a single contract with construction, so the drawings are built to be built.
Garage Conversion ADU in West Hollywood
Garage conversions dominate WeHo’s 1.9 square miles because most lots already have a detached single-car garage behind the main structure. These projects routinely require full electrical service upgrades, slab evaluation, and mechanical HVAC due to zero wall insulation and limited ventilation. Garage Conversion ADU in West Hollywood is our most common project type here.
New Detached ADU in West Hollywood
New detached units face WeHo’s design-compatibility review most directly, with massing and materials scrutinized against existing Spanish Colonial Revival and bungalow court contexts. Setback variances - the extra distance required from property lines - are often tighter than LADBS standards. New Detached ADU in West Hollywood requires a permit set built for WeHo’s specific aesthetic standards.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Before
AfterJunior ADU & Interior Conversion in West Hollywood
Junior ADU & Interior Conversion in West Hollywood solves the problem of adding rental income or family housing without expanding a building’s footprint on lots where every square foot matters. Most WeHo properties are pre-1970s multifamily stock with original 60-amp panels, zero insulation, and no mechanical cooling - so a room-to-JADU conversion isn’t just about walls and fixtures, it’s about bringing a 1950s electrical and HVAC baseline up to 2024 code while preserving the exterior character that WeHo’s design-compatibility review demands. Junior ADU & Interior Conversion is priced all-in, drawings through final inspection.
Room-to-ADU Conversion
Signs you need it
You have an underused bedroom or den in a 1950s stucco apartment building and want legal rental income without adding square footage.
What it costs in West Hollywood
Room-to-ADU conversion in West Hollywood typically runs $85,000-$140,000 all-in, including the electrical panel upgrade and mini-split HVAC that pre-1970s stock requires.
How we do it
We verify the existing slab and framing can support residential conversion, design a separate entrance that meets egress code, specify sound attenuation between units, and deliver a permit set that includes WeHo’s RSO documentation and design-compatibility materials board.
Interior JADU
Signs you need it
You own a single-family home or duplex in West Hollywood and want a code-compliant smaller unit within the existing walls, sharing utilities with the main house.
What it costs in West Hollywood
Interior JADU in West Hollywood typically runs $75,000-$125,000 all-in, with costs driven by kitchenette plumbing tie-ins and electrical sub-panel installation in uninsulated walls.
How we do it
We map the existing utility paths to minimize drywall demolition, design the kitchenette around ventless appliances where ducting is impractical, and prepare the owner-occupancy affidavit that WeHo requires for JADU approval.
What Junior ADU & Interior Conversion Costs in West Hollywood
| Item | Typical range in West Hollywood |
|---|---|
| Room-to-ADU conversion (all-in) | $85,000 - $140,000 |
| Interior JADU (all-in) | $75,000 - $125,000 |
| Electrical panel upgrade (if needed) | $4,500 - $8,500 |
Can a Junior ADU share utilities with the main house in West Hollywood?
Yes, JADUs must share utilities with the primary residence per state law, though WeHo requires separate metering arrangements documented in the permit set. Call (213) 329-7167 for an exact quote - estimates are free.
Does West Hollywood’s Rent Stabilization Ordinance apply to my Junior ADU?
If your lot contains existing RSO units, the JADU may be subject to rent stabilization - we verify RSO status before drafting and include clearance documentation in every permit set. Call (213) 329-7167 for an exact quote - estimates are free.
ADU Site Prep & Utilities in West Hollywood
ADU Site Prep & Utilities in West Hollywood addresses the hidden infrastructure gap that stops most projects before framing begins: 60-amp panels that can’t handle a second dwelling, gas laterals that don’t reach the garage, and slab-on-grade floors with no footing depth for conversion. On streets like Ogden Drive and Laurel Avenue, the original 1930s-1950s utility infrastructure was never designed for modern ADU loads. ADU Site Prep & Utilities is priced upfront, before any ground is broken.
Electrical Panel Upgrade
Signs you need it
Your existing panel is 60 or 100 amps, has no open breaker slots, or still uses fuses - common in pre-1970s WeHo stock.
What it costs in West Hollywood
Electrical panel upgrade in West Hollywood typically runs $4,500-$8,500, including SCE coordination and permit fees.
How we do it
We verify service capacity with SCE, specify a 200-amp meter-main combo that meets WeHo’s setback requirements, and coordinate the shutdown window to minimize tenant disruption on RSO properties.
Foundation & Grading
Signs you need it
Your garage slab is 4 inches thick with no footings, or your side yard slopes toward the property line, preventing drainage compliance.
What it costs in West Hollywood
Foundation and grading work in West Hollywood typically runs $12,000-$28,000, driven by limited access between structures and hand-excavation requirements.
How we do it
We core-test the existing slab, design stem walls or thickened-edge footings per WeHo’s geotechnical requirements, and export spoils through alley access to avoid street closure permits on narrow residential blocks.
What ADU Site Prep & Utilities Costs in West Hollywood
| Item | Typical range in West Hollywood |
|---|---|
| Electrical panel upgrade | $4,500 - $8,500 |
| Foundation & grading | $12,000 - $28,000 |
| Gas line extension | $3,500 - $7,500 |
Will SCE require a service upgrade for my ADU in West Hollywood?
Most pre-1970s WeHo properties need at least a 200-amp service for a full ADU; we verify capacity with SCE during design and include the upgrade in your written price. Call (213) 329-7167 for an exact quote - estimates are free.
Can you work on a sloped lot between two buildings in West Hollywood?
Yes, we specialize in tight infill lots; our grading plans account for zero side-yard drainage discharge and WeHo’s strict impervious-surface limits. Call (213) 329-7167 for an exact quote - estimates are free.
Brands We Service in West Hollywood
We specify and coordinate prefab and modular systems from Tuff Shed, James Hardie, and Abodu within our single-contract model. Parts are stocked through Los Angeles-area distributors with typical turnaround of 2-4 weeks for Hardie siding and Tuff Shed shell components. See our brands for full specifications.
Pricing for ADU in West Hollywood, CA
| Service | Typical range in West Hollywood |
|---|---|
| Room-to-ADU conversion (all-in) | $85,000 - $140,000 |
| Interior JADU (all-in) | $75,000 - $125,000 |
| Electrical panel upgrade | $4,500 - $8,500 |
| Foundation & grading | $12,000 - $28,000 |
| Gas line extension | $3,500 - $7,500 |
| Plumbing lateral extension | $5,000 - $12,000 |
| Mini-split HVAC (mechanical, no ducting) | $6,500 - $11,000 |
| Full permit set with WeHo RSO documentation | $8,500 - $15,000 |
Prices in West Hollywood run higher than regional averages due to limited site access, hand-demolition requirements between structures, and WeHo’s additional design-compatibility review cycle. Every project is quoted with a written price before any work begins - Haven Standard, Clause 1 - and that price is locked at signing under Clause 5 (No Surprises).
Neighborhoods We Serve in West Hollywood
We serve all of West Hollywood’s 1.9 square miles, with crews dispatched from our Los Angeles office for scheduled appointments. Response to initial calls is same-day; site visits are typically scheduled within 48-72 hours.
- Norma Triangle
- West Hollywood Heights
- Sunset Strip
- Spaulding Square
- Laurel Canyon-adjacent bungalows
Service Area - Cities Near West Hollywood
Our crews work throughout the central Los Angeles basin. We regularly coordinate projects in Studio City, CA, North Hollywood, CA, Sherman Oaks, CA, and Culver City, CA - each with its own permitting environment, none with WeHo’s RSO layer.
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.
FAQs About ADU in West Hollywood
West Hollywood’s Community Development Department typically adds 2-4 weeks to ADU plan check due to design-compatibility review and RSO verification that LADBS does not perform. We build this timeline into every written schedule.
West Hollywood has few formal HOAs compared to planned communities, but condominium associations and historic districts can impose additional restrictions; we review title and CC&Rs before permit submission.
We can review existing drawings for code compliance and WeHo-specific requirements, though our single-contract model means we stand behind the permit set we produce - a Free Second Opinion is available on any written estimate already in hand.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What West Hollywood Customers Say
"The rental income has covered the payment since the second month. They were realistic about the numbers rather than optimistic."
- Odette N."Garage conversion finished on the drawings and close to the schedule. They were honest that the sewer connection was the unknown, and it was."
- Arjun D."They walked us through setbacks and utility capacity before we paid anything, and told us one of our two options was not going to get approved."
- Mireille T.