ADU builder · El Monte, CA
ADU builder in El Monte.
Design, permits, financing and construction from one local team. 600+ ADUs delivered across greater LA, including nearby La Puente, Alhambra, West Covina & Montebello.
Licensed & insured · Construction from $275/sq ft · 5.0★ rated
Building an ADU in El Monte
El Monte is one of the larger cities in the central San Gabriel Valley, and many of its homes have space behind the house for a detached unit or a garage that could become one. Owners here build for family members, for rental income or to make room for a household that's outgrown the main house. State housing reports show about 168 ADU permits in El Monte in 2023 and about 106 in 2025.
Our closest projects are a two-bedroom, two-bath rental ADU with a vaulted ceiling in La Puente, a single-story ADU in Alhambra, and a two-bedroom in West Covina built for family.
With us you sign one fixed quote, deal with one project manager the whole way and get help working out how to pay for it.
ADUs in El Monte: quick facts
Updated November 2026
- Who issues ADU permits
- City of El Monte
- 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 El Monte.
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 El Monte.
El Monte, not South El Monte
El Monte and South El Monte are separate cities with separate rules and permit counters. Mailing addresses can blur the line, so we check your parcel's jurisdiction first.
City loan program
El Monte has published an ADU and junior ADU loan program for income-eligible owners, tied to affordable rents for a period of years. Check with the city on current funding, and see our ADU financing guide for other ways to pay.
Regional pre-approved plans
El Monte is listed in the San Gabriel Valley Council of Governments' pre-approved ADU plans program. We can build from one of those plans or from our floor plans.
Rules under review
The state's housing department reviewed El Monte's ADU ordinance in 2026, and the city amended its zoning code in 2025. Local ADU rules here may keep shifting, and we confirm the current version for your lot on the consultation.
What it costs
ADU cost in El Monte
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 El Monte 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
El Monte ADU questions, answered.
Still have a question? Ask us during your free consultation.
Who handles ADU permits in El Monte?
The City of El Monte does, through its own planning and building staff, not LA City or the county. South El Monte is a separate city with its own permit office, so we confirm which city your address is actually in before we draw anything.
Does El Monte help homeowners pay for an ADU?
The city has published guidelines for an ADU and junior ADU loan program, funded through the state, for income-eligible homeowners who agree to rent the unit at an affordable rent for a set period. Funding and terms change, so ask the city whether it's taking applications. We can't give lending advice, but we'll work with the program's requirements if you qualify.
How much does it cost to build an ADU in El Monte?
We charge $275, $300 or $325 per sq ft for construction, depending on the finishes you pick. A 600 sq ft one-bedroom is about $165K–$195K at those rates. Things like a sewer lateral replacement or an electrical service upgrade are priced into your fixed quote before construction.
Can I build an ADU and a junior ADU on my El Monte lot?
Often, yes. El Monte's housing plan notes that a single-family lot can potentially have the main house, an ADU and a junior ADU, for three homes in all. Whether yours can depends on its zoning and size, which we check first.
Should I convert my garage or build new?
If your garage is in decent shape, converting it is usually the lower-cost route, at $235, $260 or $285 per sq ft. A new detached unit gives you more freedom on size and layout. We'll price both on the consultation so you can compare.
Free consultation
Ready to build your ADU in El Monte?
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.
