ADU builder · Monterey Park, CA
ADU builder in Monterey Park.
Design, permits, financing and construction from one local team. 600+ ADUs delivered across greater LA, including nearby Alhambra, Montebello, South Pasadena & West Covina.
Licensed & insured · Construction from $275/sq ft · 5.0★ rated
Building an ADU in Monterey Park
Monterey Park has flat blocks and hillier streets, so lots range from simple rectangles to parcels where the backyard sits above or below the house. Homeowners here build for parents, for grown kids who want their own front door, or for rent. The city has been busy with them: about 124 ADU permits in 2024 and about 96 in 2025, per state housing reports.
Our nearest projects are next door in Alhambra, where we built a single-story ADU with an open kitchen and island, and in Montebello, where we built a 1,200 sq ft two-bedroom with a curbless shower for a mother. See our Alhambra page for photos.
You'll have a fixed quote before work begins and one project manager from design to final inspection. We also help you sort out financing.
ADUs in Monterey Park: quick facts
Updated November 2026
- Who issues ADU permits
- City of Monterey 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 nearby
ADUs we've built near Monterey 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 Monterey Park.
Planning first, then Building
Monterey Park reviews ADU plans in two steps: a preliminary review by the Planning Division, then plan check through the Building Division portal. We run both.
Sloped lots
If your yard slopes, expect a soils report and possibly grading or a retaining wall. We price that into the fixed quote so it doesn't surface during construction. The cost calculator gives a starting number for a flat lot.
Designer-owned pre-approved plans
The city has approved a set of designer-owned ADU plans. They arrive partly finished and still need the original designer to complete them for your property.
Room for extended families
ADUs and junior ADUs are allowed in every residential zone. A detached two-bedroom plus a junior ADU inside the house can give three households their own space on one lot, depending on your zoning.
What it costs
ADU cost in Monterey 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 Monterey 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
Monterey Park ADU questions, answered.
Still have a question? Ask us during your free consultation.
How does the ADU permit process work in Monterey Park?
Monterey Park asks for the plans to go to its Planning Division first for a preliminary review. Once Planning signs off, the plans are submitted through the Building Division's portal for plan check. We prepare the drawings and handle both steps for you.
Can I build an ADU on any residential lot in Monterey Park?
The city allows ADUs and junior ADUs in all of its residential zones. How many units you can add depends on how many homes are already on the lot. We check your zoning and lot before you spend anything on design.
What are Monterey Park's pre-approved ADU plans?
The city runs a designer-owned pre-approved plan program. Those plans come about 70% complete, so the owner still hires the plan's designer to finish them and fit them to the lot. We can walk you through how that compares with designing from one of our 39 floor plans.
How much does an ADU cost in Monterey Park?
Construction runs $275, $300 or $325 per sq ft for basic, mid-range or luxury finishes, so a 600 sq ft one-bedroom lands around $165K–$195K. A sloped lot can add grading, retaining walls or an engineered foundation, which goes into the fixed quote up front.
Can I convert my garage in Monterey Park?
Yes, garage conversions are allowed, and the city lets a converted garage grow slightly to make room for an entry. Our conversion rates are $235, $260 or $285 per sq ft. We check the slab and framing before you commit.
Free consultation
Ready to build your ADU in Monterey 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.
