ADU in Van Nuys, CA
Junior ADU & Interior Conversion in Van Nuys typically runs $85,000-$165,000 all-in, drawings through final inspection, while ADU Site Prep & Utilities adds $15,000-$55,000 depending on whether we’re upgrading a 60-amp electrical panel or trenching a new sewer lateral across a flat Valley lot. Most Van Nuys homeowners reach us at (424) 407-8266 after discovering their 1950s garage or basement already has informal electrical and plumbing that won’t pass LA City’s plan check. We sort that out in the permit set, not during construction.
Van Nuys sits within the City of Los Angeles jurisdiction - not an independent municipality like neighboring Burbank or Glendale - meaning homeowners here access LA City’s highly permissive ADU ordinance, including pre-approved standard plan programs and waived impact fees for units under 750 sq ft. Combined with the neighborhood’s characteristically large, flat, post-WWII San Fernando Valley lots (commonly 6,500-9,000 sq ft) loaded with detached two-car garages and rear alley access, Van Nuys offers one of the highest-density ADU conversion opportunities in the entire Valley - a regulatory and physical combination that simply doesn’t exist two miles north in Burbank.
Why Van Nuys Homes Are Different
The dominant stock is 1950s-1960s single-story stucco tract homes on rectangular lots, most of which came standard with a detached two-car garage set at the rear of the property - almost purpose-built for garage-conversion ADUs or JADUs. Many of these garages have already been informally converted over the decades, so we frequently encounter unpermitted electrical, plumbing, and framing that must be brought into compliance before a permit can close.
Van Nuys sits in the interior San Fernando Valley heat island and routinely records summer highs of 105-112°F - 15 to 20 degrees hotter than the LA coastline on the same day. This makes mechanical cooling non-negotiable in any livable ADU and drives Title 24 energy compliance costs (enhanced insulation, cool-roof requirements, right-sized HVAC) significantly higher than for ADUs built in the same city’s westside neighborhoods.
A large share of Van Nuys streets are served by rear alleys, which means detached garage ADUs can be designed with a fully independent street address-style entrance off the alley - no shared driveway conflict with the main house, no privacy issues - a selling point we use constantly that is far less available in denser, alley-scarce neighborhoods like Sherman Oaks or Studio City just to the south.
Our Main Van Nuys Services
Van Nuys homeowners call us most often for these three services, each with its own dedicated page and pricing.
ADU Design & Permitting in Van Nuys
We produce the full permit set - architectural plans, structural calcs, Title 24 energy analysis, and MEP coordination - as the core product, not an afterthought. In Van Nuys, this means navigating LA City’s pre-approved standard plan programs where they fit, or producing a custom set for irregular lots in the Van Nuys Civic Center area. Every drawing is stamped and ready for plan check before construction starts. ADU Design & Permitting in Van Nuys.
Garage Conversion ADU in Van Nuys
The detached two-car garage behind most Van Nuys tract homes is the fastest path to rental income, but only after we resolve the unpermitted electrical and plumbing that decades of informal use have left behind. We assess the existing slab, roof structure, and setbacks against LA City’s garage conversion checklist, then price the full conversion in one written contract. Garage Conversion ADU in Van Nuys.
New Detached ADU in Van Nuys
For homeowners with alley access or a deep rear yard, a new detached unit avoids the compromises of working within an existing garage footprint. We coordinate prefab systems from Abodu or Cover, or stick-build with James Hardie siding, all under the same single contract. Setback, height, and fire separation compliance are verified in the permit set before ground breaks. New Detached ADU in Van Nuys.
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 & Interior Conversion in Van Nuys turns existing conditioned space - a basement, a room addition, or the main house’s spare bedroom - into a legally permitted rental unit without adding new square footage to the lot. In a neighborhood where 1950s tract homes sit on 6,500-9,000 sq ft lots with alley-served garages, the JADU path lets owners generate income from space they already own, while the interior conversion route brings decades of informal work into compliance before LA City’s plan check. Junior ADU & Interior Conversion covers every option we offer across Los Angeles County.
Room-to-ADU Conversion
Signs you need it
You have a 250-400 sq ft bedroom, den, or former maid’s quarters with its own exterior door that you want to permit as a separate rental unit.
What it costs in Van Nuys
Room-to-ADU conversions in Van Nuys typically run $85,000-$135,000 all-in, including the kitchenette, bathroom rough-in, separate meter coordination, and permit set.
How we do it
We measure existing conditions, produce the permit set with fire separation and sound attenuation details, then build to that set under our single contract with a written price locked at signing.
Interior JADU
Signs you need it
You want to create a 150-500 sq ft unit inside your existing home, sharing a wall with the primary residence, with owner-occupancy required on site.
What it costs in Van Nuys
Interior JADUs in Van Nuys typically run $65,000-$110,000 all-in, including the efficiency kitchen, separate entrance, and code-compliant egress window.
How we do it
We verify the existing floor plan meets JADU size and entrance requirements, produce the permit set, then build the kitchenette and bath rough-in to match the approved drawings exactly.
What Junior ADU & Interior Conversion Costs in Van Nuys
| Item | Typical range in Van Nuys |
|---|---|
| Room-to-ADU conversion (all-in) | $85,000-$135,000 |
| Interior JADU (all-in) | $65,000-$110,000 |
| Basement ADU conversion (all-in) | $95,000-$165,000 |
Can I convert a basement to an ADU in Van Nuys?
Yes, if the basement has 7.5-foot minimum ceiling height, legal egress, and ventilation that meets LA City’s residential code - we assess these three items in our first site visit and document them with photos. Call (424) 407-8266 to schedule.
Does a JADU require a separate meter in Van Nuys?
No, LA City allows JADUs to share electrical and gas meters with the primary residence, though separate metering is often worth the $3,500-$6,000 upgrade for rental clarity - we price both options in the written quote. Call (424) 407-8266 for exact numbers.
ADU Site Prep & Utilities in Van Nuys
ADU Site Prep & Utilities in Van Nuys addresses the infrastructure gap between an approved permit set and a buildable site: the 60-amp electrical panel that can’t handle a second kitchen, the clay-heavy Valley soil that needs compaction before a slab pour, the sewer lateral that hasn’t been touched since 1958. On flat 6,500-9,000 sq ft lots with rear alley access, we trench and backfill efficiently, but the 105-112°F summer heat means every utility run gets scheduled for morning hours to protect crew safety and concrete cure times. ADU Site Prep & Utilities details our full scope across the county.
Electrical Panel Upgrade
Signs you need it
Your existing panel is 60-100 amps with no spare breaker slots, or the main service line is overhead and undersized for a second dwelling unit.
What it costs in Van Nuys
Electrical panel upgrades in Van Nuys typically run $4,500-$9,500 for a 200-amp service, including permit, inspection, and LADWP coordination.
How we do it
We pull the electrical permit, coordinate LADWP service upgrade scheduling, install the new panel and grounding system, then pass inspection before rough-in begins.
Plumbing Lateral
Signs you need it
Your sewer lateral is original cast iron or terra cotta with visible root intrusion, or the ADU location exceeds 100 feet from the main house connection.
What it costs in Van Nuys
Plumbing lateral replacement or extension in Van Nuys typically runs $8,500-$18,000, including trenching, new 4-inch ABS, city inspection, and street-to-house connection.
How we do it
We camera the existing line, produce the trenching plan with utility clearance marks, install the new lateral to grade, then schedule LA Sanitation 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/extension | $8,500-$18,000 |
| Foundation & grading (new detached) | $12,000-$28,000 |
Will LADWP delay my ADU project in Van Nuys?
LADWP service upgrades typically take 6-10 weeks from permit approval to meter set, so we file the application immediately after plan check approval and coordinate the trench inspection to avoid idle crew time. Call (424) 407-8266 to review your service line status.
Do I need to replace my sewer lateral for a garage conversion ADU?
Not always - if the camera inspection shows intact 4-inch line with proper slope and no root intrusion, we can often tie in the new ADU fixtures directly; replacement adds $8,500-$18,000 only when the existing line fails. Call (424) 407-8266 to schedule a camera inspection.
Brands We Service in Van Nuys
We specify and coordinate prefab and modular systems from Abodu, Cover, Dvele, Mighty Buildings, Boxabl, Plant Prefab, Tuff Shed, and James Hardie - all within the same single contract. For Van Nuys homeowners, this means factory-built wall panels or full modules arrive on a flatbed and crane into place on the foundation we’ve already poured and inspected. Our brands page lists lead times and specification sheets.
Pricing for ADU in Van Nuys, CA
| Service | Typical range in Van Nuys |
|---|---|
| Room-to-ADU conversion | $85,000-$135,000 |
| Interior JADU | $65,000-$110,000 |
| Basement ADU conversion | $95,000-$165,000 |
| Electrical panel upgrade (200-amp) | $4,500-$9,500 |
| Plumbing lateral replacement/extension | $8,500-$18,000 |
| Foundation & grading (new detached) | $12,000-$28,000 |
| Gas line extension | $3,500-$8,500 |
| Landscaping & hardscape (post-build) | $5,000-$15,000 |
Three factors push Van Nuys prices toward the higher end: Title 24 cool-roof and insulation requirements driven by Valley heat, unpermitted existing work that must be demolished and rebuilt to code, and LADWP service upgrade timelines that extend the project calendar. Under Haven Standard Clause 1, every project is quoted with a written price before any work begins - no range that widens, no “allowances” that balloon.
Neighborhoods We Serve in Van Nuys
We work across Van Nuys from the Civic Center to the Valley Glen border, with crews dispatched from our Los Angeles office. Most site visits are scheduled within 48 hours of call.
- Van Nuys Civic Center
- Lake Balboa (Van Nuys-adjacent)
- Valley Glen
- North Van Nuys
- South Van Nuys (near Victory Blvd corridor)
Service Area - Cities Near Van Nuys
Our crews serve the full San Fernando Valley corridor, including Sherman Oaks, CA to the south, Studio City, CA southeast through the Cahuenga Pass, North Hollywood, CA east along the 134 corridor, and Tarzana, CA west toward the Ventura County line. Each city has its own permit jurisdiction and pricing page.
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
LA City’s standard plan program can approve a qualifying ADU in 4-6 weeks; custom plans typically take 8-14 weeks through the Van Nuys/Valley plan check counter, with corrections adding 2-4 weeks per round.
Most Van Nuys neighborhoods are unincorporated LA City with no HOA; the few gated communities near Lake Balboa may have CC&Rs that restrict exterior finishes or rental terms, which we review before producing the permit set.
Yes - we offer a Free Second Opinion on any written estimate or permit set already in hand, and we can build from your architect’s drawings after our structural and MEP review confirms constructability and code compliance.
Call (424) 407-8266 to schedule your free estimate. A live person answers 24/7.
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
"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."Every allowance was itemised at the start, so the finish selections did not turn into a surprise at the end."
- Benedict H."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.