ADU in Van Nuys, CA
Junior ADU and interior conversion in Van Nuys typically runs $85,000-$165,000 all-in, while site prep and utility work adds $15,000-$45,000 depending on whether your 1950s ranch needs a panel upgrade or sewer lateral replacement. We’re Ellery ADU Studio, a design-build practice that handles drawings, permits, and construction under one contract at one written price. Call (424) 551-7706 to schedule your free estimate.
Van Nuys is built on flat, rectangular lots with alley-facing detached garages and post-war ranch homes that families have owned for generations. The casita culture here is real - these aren’t investor rentals, they’re homes for parents, adult children, or a sibling’s family. That changes how we design: the kitchen gets a full stove, not a hot plate; the bathroom needs a tub for toddlers; the separate entrance has to feel dignified, not like a back door.
Why Van Nuys Homes Are Different
Van Nuys sits in the deepest part of the San Fernando Valley heat pocket, where summer temperatures routinely hit 105°F - among the highest readings in Los Angeles County. Every ADU here must pass strict Title 24 energy compliance for cooling loads, and mini-split HVAC is effectively non-negotiable. That adds cost that contractors in milder neighborhoods don’t face as consistently.
The housing stock is overwhelmingly 1948-1968 post-war ranch: 6,000-7,500 sq ft lots, detached one- or two-car garages, aging 60-amp sub-panels, uninsulated slab foundations, and original stucco that must be matched. These conditions complicate permitting and budgets for homeowners who underestimate scope. Because Van Nuys falls under City of LA jurisdiction, the Standard ADU Plan Program can slash permit timelines from months to weeks - but most homeowners have never heard of it.
Our Main Van Nuys Services
Van Nuys homeowners call us most often for these three services:
ADU Design & Permitting in Van Nuys
We produce the full permit set - architectural plans, structural calculations, Title 24 energy compliance, and MEP coordination - as the core product, not an afterthought. In Van Nuys, we regularly navigate the Standard ADU Plan Program for qualifying projects, and we know which Valley-planning cases trigger additional review. ADU Design & Permitting in Van Nuys covers every phase from feasibility study to issued permit.
Garage Conversion ADU in Van Nuys
The alley-facing garage is the dominant ADU project type here. We assess slab thickness, roof structure, and whether the existing foundation can carry residential loads - common issues in 1950s construction. Our single contract covers drawings, permits, and build-out, so there’s no designer-versus-builder blame gap if the alley access proves tighter than expected. Garage Conversion ADU in Van Nuys details our process.
New Detached ADU in Van Nuys
When the garage won’t work or the lot has rear-yard space, we design and build new detached units from foundation to final inspection. Setback variances - the extra distance City of LA requires from property lines - often govern placement on these 6,000 sq ft lots. We coordinate prefab systems from Abodu or Cover when speed matters. New Detached ADU in Van Nuys explains feasibility and pricing.
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.
Junior ADU & Interior Conversion in Van Nuys
Junior ADU and interior conversion in Van Nuys solves a specific problem: large multi-generational households who need a separate, legal living unit without building new square footage. The 1950s ranch stock here - single-story, simple rooflines, often with underutilized basements or attached wings - converts more cleanly than the hillside homes in other LA markets. We handle the full Junior ADU & Interior Conversion scope under one contract, including the reduced-parking waiver that JADUs qualify for under state law.
Room-to-ADU Conversion
Signs you need it
You have a ground-floor bedroom or den with exterior access, a separate entrance is feasible, and your household needs independent living space for family.
What it costs in Van Nuys
Room-to-ADU conversion in Van Nuys typically runs $85,000-$140,000 all-in, including the kitchenette, bathroom, separate meter coordination, and permit set.
How we do it
We survey the existing structure, design the new kitchenette and bath layout to JADU code, produce the permit set, and build - all under one written price.
Interior JADU
Signs you need it
You need a legal second unit inside your existing home for family, not rental income, and want to avoid the cost of new construction entirely.
What it costs in Van Nuys
Interior JADU in Van Nuys typically runs $75,000-$125,000 all-in, covering the kitchenette, bath, firewall separation, and owner-occupancy documentation.
How we do it
We identify the smallest viable footprint, design to JADU efficiency standards, pull permits under the streamlined state rules, and deliver a finished unit with photo documentation.
What Junior ADU & Interior Conversion Costs in Van Nuys
| Item | Typical range in Van Nuys |
|---|---|
| Room-to-ADU conversion (all-in) | $85,000 - $140,000 |
| Interior JADU (all-in) | $75,000 - $125,000 |
| Above-garage ADU (all-in) | $110,000 - $175,000 |
Can a JADU have a full kitchen in Van Nuys?
No - California law limits JADUs to kitchenettes with cooking facilities, not full stoves. We design to the maximum allowable appliance package and document it in your permit set so inspection passes cleanly.
Does a JADU require separate utilities in Van Nuys?
No - JADUs may share utilities with the primary residence, which saves $8,000-$15,000 compared to a full ADU. We coordinate the shared-service agreement with LADWP and document it in your permit package.
ADU Site Prep & Utilities in Van Nuys
ADU site prep and utilities in Van Nuys addresses the hidden infrastructure that 1950s ranch homes lack: 60-amp panels that can’t handle a second dwelling, clay soil and uninsulated slabs that need reinforcement, and sewer laterals that haven’t been touched in sixty years. The Valley heat pocket drives cooling loads that standard HVAC can’t meet, so electrical capacity is often the first bottleneck we solve. We handle ADU Site Prep & Utilities as a defined scope with its own written price, whether it’s standalone work or bundled with your build.
Electrical Panel Upgrade
Signs you need it
Your main panel is 60 or 100 amps, the ADU adds significant load, or LADWP requires service-line replacement for a second meter.
What it costs in Van Nuys
Electrical panel upgrade in Van Nuys typically runs $4,500-$9,500 for a 200-amp service, including permit, inspection, and LADWP coordination.
How we do it
We assess load calculations for the ADU, specify the new panel and service line, pull permits, and coordinate LADWP shutdown and reconnection.
Plumbing Lateral
Signs you need it
Your sewer lateral is original clay or cast iron, the ADU adds a second kitchen and bath, or video inspection shows root intrusion or collapse.
What it costs in Van Nuys
Plumbing lateral replacement in Van Nuys typically runs $8,500-$18,000, including trenching, new ABS or PVC line, city inspection, and surface restoration.
How we do it
We video-inspect the existing line, design the replacement route, trench or trenchless as site conditions allow, and pass city inspection before backfill.
What ADU Site Prep & Utilities Costs in Van Nuys
| Item | Typical range in Van Nuys |
|---|---|
| Electrical panel upgrade (200-amp) | $4,500 - $9,500 |
| Plumbing lateral replacement | $8,500 - $18,000 |
| Foundation and grading (new detached) | $12,000 - $28,000 |
Do I need a panel upgrade for every ADU in Van Nuys?
Not always - a JADU sharing utilities may keep the existing panel if load calculations pass. We run the numbers during feasibility and tell you before you sign.
How long does utility coordination with LADWP take?
Typically 3-6 weeks for a standard service upgrade in Van Nuys, longer if trenching crosses the parkway. We handle all coordination and include the timeline in your written scope.
Brands We Service in Van Nuys
We specify and coordinate prefab and modular systems from Abodu, Cover, Dvele, and Mighty Buildings within our single-contract model. Parts and warranty support are stocked through Los Angeles-area distribution, with typical turnaround of 2-4 weeks for module delivery once permits issue. See our brands for full specifications.
Pricing for ADU in Van Nuys, CA
| Service | Typical range in Van Nuys |
|---|---|
| Room-to-ADU conversion (all-in) | $85,000 - $140,000 |
| Interior JADU (all-in) | $75,000 - $125,000 |
| Above-garage ADU (all-in) | $110,000 - $175,000 |
| Electrical panel upgrade (200-amp) | $4,500 - $9,500 |
| Plumbing lateral replacement | $8,500 - $18,000 |
| Foundation and grading (new detached) | $12,000 - $28,000 |
| Gas line extension | $3,500 - $7,500 |
| Landscaping and hardscape restoration | $5,000 - $15,000 |
Prices in Van Nuys push higher when we hit aging infrastructure - clay sewer laterals, 60-amp panels with no expansion space, or slabs that need structural reinforcement for residential loads. Every project is quoted with a written price before any work begins, per Haven Standard Clause 1. The scope is locked at signing; no door-side upsells, no scope creep.
Neighborhoods We Serve in Van Nuys
We work across Van Nuys proper and adjacent residential pockets, with scheduling coordinated from our Los Angeles office and crews dispatched locally. Response for initial site visits is typically within 48 hours.
- Van Nuys
- Lake Balboa
- Valley Glen
- Panorama City (west of Van Nuys Blvd)
- Sepulveda Basin
Service Area - Cities Near Van Nuys
Our crews serve the full San Fernando Valley corridor. Homeowners in Sherman Oaks, CA, Studio City, CA, North Hollywood, CA, and Encino, CA regularly engage us for ADU design, permitting, and build services under the same single-contract model we apply in Van Nuys.
Serving Van Nuys, CA - Our Local Coverage Area
We’re based in the Van Nuys 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 Van Nuys
City of LA standard review runs 4-6 months, but qualifying projects using the Standard ADU Plan Program can cut that to 4-8 weeks. We determine eligibility during feasibility and build the appropriate timeline into your written scope.
Most detached ADUs under 1,200 sq ft in City of LA jurisdiction do not require fire sprinklers if they meet setback and access requirements. We verify this during code analysis and document it in your permit set.
California law prohibits HOAs from outright banning ADUs, but they may impose reasonable design standards. We review your CC&Rs during feasibility and flag any restrictions that could affect permit strategy or build timeline.
Call (424) 551-7706 to schedule your free estimate. Every project receives a written price before work starts, a documented photo record on every visit, and the 365-Day Done Right Promise - all backed in writing under The Haven Standard.
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 Van Nuys Customers Say
"Every allowance was itemised at the start, so the finish selections did not turn into a surprise at the end."
- Benedict H."The permit set and the build were one contract with one number. Our neighbours used two firms and spent a year watching them blame each other."
- Helena V."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.