ADU builder · Northridge, Los Angeles
ADU builder in Northridge.
Design, permits, financing and construction from one local team. 600+ ADUs delivered across greater LA, including nearby Van Nuys, Lake View Terrace & Tujunga.
Licensed & insured · Construction from $275/sq ft · 5.0★ rated
Building an ADU in Northridge
Northridge is a mostly flat, mostly single-family part of the north San Fernando Valley, and it's home to Cal State Northridge. Flat ground keeps ADU site work simple, so most of the planning here goes into where the unit sits on the lot and how it connects to existing utilities. ADU building is picking up quickly: the Northridge planning area went from about 156 ADU permits in 2023 to about 255 in 2025, per state housing reports. That's the biggest percentage jump of any Valley planning area over those two years.
ADU Resource Center designs, permits and builds ADUs with one in-house team. Our nearest finished work is in Van Nuys and Lake View Terrace, and a little farther east in Tujunga, where we built a two-story ADU with solar on a corner lot. The Lake View Terrace unit is a 1,200 sq ft, three-bedroom ADU with its own garage. More of our north Valley work is on our Tujunga page, and our Granada Hills page covers the neighborhood just north of you.
You'll have a fixed construction quote before work begins and one project manager from design to final inspection. We also help you sort out financing.
ADUs in Northridge: quick facts
Updated November 2026
- Who issues ADU permits
- City of Los Angeles: LADBS (Department of Building and Safety)
- Our construction rates
- $275, $300 or $325 per sq ft (basic, mid-range, luxury); garage conversions $235–$285 per sq ft
- Example cost
- A 600 sq ft one-bedroom runs about $165K–$195K in construction
- Size limits under state law
- Detached ADUs up to 1,200 sq ft on many lots; junior ADUs up to 500 sq ft inside the home
- Permit decision
- State law requires a decision within 60 days of a complete application
- Who builds it
- ADU Resource Center: design, permits and construction by one team, 600+ ADUs delivered, office in Glendale
ADU rules change. We confirm the current rules for your lot on the free consultation.
Real projects nearby
ADUs we've built near Northridge.
Hear it from our clients
Homeowners on building their ADU with us
More stories on our testimonials page.
Local know-how
What to know before building in Northridge.
LADBS and pre-approved plans
Plans for Northridge ADUs go through LADBS. On a flat lot, a design from LA's Standard Plan program can shorten review, and we can also start from one of our own 39 floor plans.
Room to lay out a full unit
Flat lots make it easier to fit a detached ADU of up to 1,200 sq ft, which state law allows on many lots. We'll check your setbacks and where the unit can go before we design.
Multifamily properties
If you own a duplex or small apartment building, the lot can often take more than one ADU. See our multi-family ADU page. These projects are quoted individually.
Permit activity is rising
About 255 ADU permits were issued in the Northridge planning area in 2025, up from about 196 in 2024, per state housing reports.
What it costs
ADU cost in Northridge
We build at a flat rate per square foot: $275 (basic), $300 (mid-range) and $325 (luxury) finishes. Here's what that means for common sizes. Construction only; design, permits and city fees are quoted separately on your consultation.
| ADU size | Basic | Mid-range | Luxury |
|---|---|---|---|
| 400 sq ft studio | ~$110K | ~$120K | ~$130K |
| 600 sq ft 1-bedroom | ~$165K | ~$180K | ~$195K |
| 800 sq ft 2-bedroom | ~$220K | ~$240K | ~$260K |
| 1,000 sq ft 2–3 bedroom | ~$275K | ~$300K | ~$325K |
Get a number for your exact size: ADU cost calculator · Browse ADU floor plans · Converting a garage? See garage conversion cost.
Free consultation
Start your Northridge ADU.
Tell us about your property. We'll confirm what's buildable, give you a real price range and walk through financing within 1 business day.
Questions
Northridge ADU questions, answered.
Still have a question? Ask us during your free consultation.
Who handles ADU permits for a Northridge home?
Northridge is a neighborhood of the City of Los Angeles, so your ADU is permitted by LADBS. We put together the plans, file them, respond to plan-check comments and pull the permit. Once the application is complete, the city has 60 days to act on it.
What does ADU construction in Northridge cost?
We charge a flat construction rate by finish level: $275, $300 or $325 per sq ft. A 600 sq ft mid-range unit runs about $180K, and a 1,000 sq ft luxury unit is closer to $325K. Your fixed quote can differ from size times rate because of the ADU type, utilities and the condition of what's already on the lot.
Can I build more than one unit on my Northridge lot?
Often a single-family lot can have a detached ADU plus a junior ADU of up to 500 sq ft inside the house. Multifamily lots can often add more than one ADU. Rules change, so we confirm what your parcel allows on the consultation.
My house is older. Will the utilities need upgrades?
Sometimes. An ADU adds load to the electrical panel and a new line to the sewer, and older homes may need a bigger panel or a new sewer connection. We check both on the site visit and include any upgrade in the fixed quote, so it doesn't come up halfway through the build.
Is a garage conversion a good option in Northridge?
It can be. Converting a garage reuses the slab, walls and roof, and our conversion rates run $235 to $285 per sq ft. A two-car garage usually lands at about $95K–$125K. We check the garage's condition first, since older ones sometimes need foundation or framing work.
Free consultation
Ready to build your ADU in Northridge?
Tell us about your property and we'll confirm what's buildable, give you a real price range and lay out financing on one free call.
