ADU Builder in Van Nuys, CA

Q: How long does it take to build an ADU in Van Nuys?

Roughly 8-14 months end to end: about 3-6 weeks for design and engineering, 4-10 weeks for LADBS plan check and permits, and 4-7 months of construction. An LADBS Standard Plan can cut several weeks off permitting.

HomeSense Construction & Remodeling is a licensed ADU builder in Van Nuys, California, designing and building detached accessory dwelling units, garage conversions, and junior ADUs for homeowners and small property owners across the central San Fernando Valley. We have built in Los Angeles since 2011 under CA License #1125001, and we handle the whole job in-house: feasibility, design, LADBS plan check, permits, construction, and final sign-off.

Van Nuys is one of the strongest ADU markets in the Valley. Lots are generous, a large share of the housing stock was built before 1970 with detached garages, and rental demand from nearby employment centers stays high year-round. That combination means a Van Nuys ADU is usually both a livable space upgrade and a real income asset.

ADU Types We Build in Van Nuys

Detached new-construction ADUs — freestanding one- or two-bedroom units, typically 400–1,200 sq ft, built in the rear yard with their own entrance, kitchen, and bath.
Garage conversions — turning an existing detached or attached garage into a permitted dwelling. The slab, walls, and roof already exist, so cost per square foot is usually the lowest of any ADU route.
Attached ADUs — an addition tied to the main house that shares one wall but functions as a fully independent unit.
Junior ADUs (JADUs) — up to 500 sq ft carved out of the existing footprint, often a converted bedroom with an efficiency kitchen.
Multifamily ADUs — detached units added to duplex, triplex, and small apartment properties under California’s 2025–2026 multifamily rules.

What an ADU Costs in Van Nuys (2026)

As of 2026, permitted, move-in-ready detached ADU construction in the City of Los Angeles generally runs about $300–$450 per square foot, with garage conversions coming in lower per square foot because the structural shell is already there. Typical all-in project ranges we see in Van Nuys:

Garage conversion (roughly 400 sq ft): about $110,000–$170,000
Detached studio or 1-bedroom (400–600 sq ft): about $140,000–$250,000
Detached 2-bedroom (750–1,000 sq ft): about $230,000–$400,000

Budget separately for city fees. LADBS permit and plan-check fees for an ADU in Los Angeles typically total $5,000–$14,000 in 2026 depending on construction valuation and size. One useful rule: ADUs at or under 750 sq ft are exempt from school impact fees, which is why so many Van Nuys projects are deliberately sized just under that line. Site conditions drive the rest — sewer and panel capacity, grade, soil, and how far utilities have to run from the main house. See our remodeling cost guides for detailed line-item breakdowns.

Van Nuys ADU Permits, LADBS Standard Plans & 2026 Timelines

Van Nuys is inside the City of Los Angeles, so your ADU is permitted through LADBS rather than a separate city hall. State law requires ADU applications to be approved or denied ministerially within 60 days of a complete submittal — there is no discretionary hearing and no neighbor approval process for a code-compliant ADU.

The fastest route is often the LADBS ADU Standard Plan Program, a library of pre-reviewed ADU designs. Because the structural and architectural review is already done, plan check is dramatically shorter and permits can issue far faster than a fully custom set. If a standard plan fits your lot and your program, we will tell you — it frequently saves both weeks and design fees. When it does not fit, we produce a custom set built around your setbacks and utilities.

Realistic Van Nuys timeline: 3–6 weeks design and engineering, 4–10 weeks plan check and permitting (shorter with a standard plan), and 4–7 months of construction depending on size and scope. One more 2026 item: the updated Title 24 energy code took effect January 1, 2026 and extends cool-roof requirements to steep-slope residential roofs in hot inland climate zones — the San Fernando Valley sits in climate zone 9, so we spec your ADU roof to comply from day one instead of correcting it at inspection.

Two Van Nuys-Specific Opportunities Most Owners Miss

1. Apartment and duplex properties can now add detached ADUs. Under SB 1211, effective January 1, 2025, a lot with an existing multifamily building may add up to eight detached ADUs, capped at the number of existing units on the lot — so a four-unit building can add up to four. The law also bars cities from requiring replacement parking when existing surface parking is converted. Van Nuys has an unusually high concentration of small multifamily properties, and many owners still assume the old two-unit limit applies.

2. Unpermitted conversions built before 2020 can often be legalized. AB 2533 created a path to permit unpermitted ADUs and JADUs constructed before January 1, 2020, and it limits a city’s ability to deny legalization absent a genuine health-and-safety hazard. If you bought a Van Nuys home with a “bonus room” behind the garage that never appeared on a permit, that space may be legalizable — which protects resale, insurance, and rental income. We will pull the property’s permit history and give you a straight answer before you spend anything.

Rules and local implementation change; we verify current LADBS requirements for your specific parcel before design begins.

Why Van Nuys Homeowners Choose HomeSense

Licensed, bonded, and insured general contractor — CA License #1125001, building in Los Angeles since 2011.
One accountable team from feasibility through final inspection, so design, permitting, and construction never point fingers at each other.
Local permit fluency — we work inside LADBS constantly and know where Valley projects actually get held up.
Fixed, itemized proposals with a written schedule, so you know the number and the finish date before demolition starts.
Rental-ready detailing — separate utilities, sound isolation, and durable finishes when the unit is meant to produce income.

Serving Van Nuys & the Surrounding San Fernando Valley

We build throughout Van Nuys and the neighboring Valley communities, and we serve greater Los Angeles within roughly 60 miles of our West Hills office. Explore related work: our main ADU construction in Los Angeles page, and nearby ADU builds in Encino, Northridge, and Woodland Hills. Also in Van Nuys: bathroom remodeling. If an ADU is not the right fit, compare it with a home addition. Full coverage map on our service areas page.

Frequently Asked Questions

How much does it cost to build an ADU in Van Nuys in 2026?

Most permitted Van Nuys ADUs land between $110,000 and $400,000 depending on type and size. Detached new construction generally runs $300–$450 per square foot in 2026; garage conversions cost less per square foot because the slab, walls, and roof already exist. LADBS permit and plan-check fees typically add $5,000–$14,000.

How long does it take to build an ADU in Van Nuys?

Plan on roughly 8–14 months end to end: about 3–6 weeks for design and engineering, 4–10 weeks for LADBS plan check and permits, and 4–7 months of construction. Using an LADBS Standard Plan can cut several weeks off the permitting stage.

Can I build an ADU on a Van Nuys duplex or apartment property?

Yes. Under SB 1211, effective January 1, 2025, a lot with an existing multifamily building can add up to eight detached ADUs, not exceeding the number of existing units on that lot. Cities also cannot require replacement parking when existing surface parking is converted.

Can I legalize an unpermitted garage conversion in Van Nuys?

Often yes. AB 2533 created a path to legalize unpermitted ADUs and junior ADUs built before January 1, 2020, and it restricts a city from denying the permit unless there is a real health-and-safety hazard. We start by pulling the property’s permit history and inspecting the existing work.

Do I have to add parking for an ADU in Van Nuys?

Usually not. California law waives ADU parking requirements in many situations, including when the property is within half a mile walking distance of public transit — which covers much of Van Nuys. We confirm the exemption that applies to your parcel during feasibility.

Get a Free Van Nuys ADU Estimate

Tell us your lot, your budget, and what you want the unit to do — rental income, family housing, or a home office — and we will tell you honestly what fits. Call (818) 300-3422, message us at (818) 266-1292, or email homesense2000@gmail.com. More answers on our FAQ page, or reach us through contact.

Also re-roofing your Van Nuys home? See our Van Nuys roofing contractor guide for permit, cool-roof, and cost details.

Nearby: ADU builder in Reseda