ADU builder · Highland Park, CA
ADU builder in Highland Park.
Design, permits, financing and construction from one local team. 600+ ADUs delivered across greater LA, including projects in and around Highland Park.
Licensed & insured · Construction from $275/sq ft · 5.0★ rated
Building an ADU in Highland Park
Highland Park has some of the oldest housing stock in Los Angeles, from Craftsman bungalows to hillside homes. That character is a big part of why people want to live here, and it also shapes ADU design: in the historic overlay zone, the look of a new unit matters as much as its floor plan.
ADU Resource Center designs, permits and builds ADUs in Highland Park with one in-house team. Here we built a mid-century two-story ADU with a loft, a floating wood staircase and blue siding, and a detached backyard unit with a vaulted ceiling and in-unit laundry. We've also built next door in Eagle Rock and South Pasadena.
You get a fixed quote before construction starts, one project manager from design through final inspection, and help lining up financing.
ADUs in Highland Park: quick facts
Updated November 2026
- Who issues ADU permits
- City of Highland Park
- 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 in and around Highland Park
Our work in and around Highland Park.
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 Highland Park.
Historic overlay zone
Large parts of Highland Park sit in the Highland Park–Garvanza HPOZ. Exterior materials, rooflines and street visibility can get extra review, so we design the ADU to fit the house and the block.
City of LA permits
Plans go through LADBS. LA's Standard Plan program offers pre-approved designs, though historic review can still apply to them.
Hillside streets
Sloped lots can need a soils report, retaining walls and an engineered foundation. We plan for it in the first design pass so it's in your quote from the start.
Small lots, smart layouts
Many Highland Park lots are narrow. A two-story ADU, an attached unit or a garage conversion can fit where a big detached unit won't. We'll show you each option on your lot.
What it costs
ADU cost in Highland Park
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 Highland Park 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
Highland Park ADU questions, answered.
Still have a question? Ask us during your free consultation.
Can I build an ADU in Highland Park?
Most single-family lots in Highland Park can add a detached ADU, an attached ADU or a garage conversion, and often a junior ADU inside the house. Homes in the historic overlay zone or on hillsides add steps. We check your lot against current City of Los Angeles and state rules on your free consultation, since ADU rules change from time to time.
Does the Highland Park HPOZ affect my ADU?
It can. Large parts of Highland Park are in the Highland Park–Garvanza Historic Preservation Overlay Zone, where exterior design can get extra review. State law limits how much a city can restrict ADUs, but design details such as materials and visibility from the street can still come up. We design with that review in mind.
Who issues ADU permits in Highland Park?
Highland Park is a neighborhood of the City of Los Angeles, so ADU plans go through LADBS, plus City Planning for HPOZ review where it applies. We prepare and submit the plans and answer every correction.
How much does an ADU cost in Highland Park?
We build at a flat construction rate of $275, $300 or $325 per sq ft for basic, mid-range or luxury finishes, so a 600 sq ft one-bedroom runs roughly $165K–$195K in construction. Garage conversions have their own rates of $235–$285 per sq ft. Historic-matching materials, slopes or utility upgrades can change the fixed quote for your property.
Can I build a two-story ADU in Highland Park?
Often, yes, depending on your lot and the height rules that apply to it. We built a two-story ADU with a loft in Highland Park. A two-story design adds scope and cost compared with a single-story unit of the same size, and we'll show you both options.
Free consultation
Ready to build your ADU in Highland Park?
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.
