







A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in La Crescenta-Montrose, CA
Fielding ADU Builders handles accessory dwelling units, garage conversions, and room additions in La Crescenta-Montrose, and we do it with a written price in your hand before any work starts. Homes here sit against the San Gabriel foothills on lots that often slope or step, with older stock that needs real structural care when you add square footage. If you’re planning an ADU in La Crescenta-Montrose, call (361) 315-4177 for a free estimate.
Why La Crescenta-Montrose Homes Are Different

La Crescenta-Montrose sits in a transition zone. Homes closer to Foothill Boulevard tend to be mid-century builds on flatter lots, while the streets climbing toward Angeles National Forest run into steeper grades, retaining walls, and drainage concerns that an addition or ADU has to respect from day one. Many original homes were built before modern seismic and energy codes, so tying a new structure into an existing house here usually means a closer look at the foundation and the shear wall plan.
Setbacks matter more in La Crescenta-Montrose than in flatter parts of Los Angeles County. A hillside lot can trigger slope-density rules, and a setback variance – the city’s written permission to build closer to the property line than the standard rule allows – is a real part of the conversation on many of the older parcels. We plan for that conversation before we ever put a number in front of you.
Our Main La Crescenta-Montrose Services
Most homeowners who call us in La Crescenta-Montrose are weighing one of two things: adding space to the house they already have, or converting space they are not using. Here is how each one works locally.
Room Addition Contractor in La Crescenta-Montrose
A room addition in La Crescenta-Montrose means matching rooflines and stucco on homes that have often been through several remodels already. We tie the new foundation into the existing slab or crawl space, extend the roofline so the addition does not read as a box stuck on the side, and pull permits before framing starts. On hillside lots, the engineering work on retaining and drainage is where the real cost and the real risk sit. See the full scope on our Room Addition Contractor in La Crescenta-Montrose page.

Garage Conversion Contractor in La Crescenta-Montrose
Garage conversions here usually mean taking a detached two-car garage built in the 1950s or 1960s and turning it into a permitted living unit. In La Crescenta-Montrose, the condition of the slab, the condition of the framing, and the distance from the main house to the garage all shape the price. We handle the structural reinforcement, insulation, plumbing and electrical runs, and the finished interior, with permits pulled and inspections passed. Details are on our Garage Conversion Contractor in La Crescenta-Montrose page.

ADU Builders in La Crescenta-Montrose
A detached ADU in La Crescenta-Montrose has to fit a specific lot, and many lots here are not square or flat. We work with prefab platforms like Abodu and Cover where the site suits them, and we build conventional stick-frame ADUs where the grade, setbacks, or access demand it. Either way, the price goes in writing before any work starts, and the permit set is submitted before we mobilize. See our ADU Builders in La Crescenta-Montrose page for the full breakdown.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in La Crescenta-Montrose
We work with James Hardie siding on conventional builds, and we are fluent with Abodu, Cover, and Dvele prefab platforms where they fit the lot and the budget. Parts and panels are ordered through our normal supply channels, and we schedule delivery around your permit timeline. See our brands for the full list.
Pricing for ADU Company in La Crescenta-Montrose, CA
| Service | Typical range in La Crescenta-Montrose |
|---|---|
| Detached ADU (prefab platform, 400 – 600 sq ft) | $180,000 – $260,000 |
| Detached ADU (stick-frame, 400 – 600 sq ft) | $220,000 – $320,000 |
| Garage conversion to ADU (finished) | $90,000 – $150,000 |
| Garage conversion (shell only, no finishes) | $60,000 – $90,000 |
| Room addition (200 – 400 sq ft, single story) | $80,000 – $140,000 |
| Room addition (400 – 800 sq ft, single story) | $140,000 – $240,000 |
| Second-story addition (400 – 600 sq ft) | $180,000 – $300,000 |
| Kitchen extension (150 – 250 sq ft) | $55,000 – $95,000 |
| Primary suite addition (300 – 450 sq ft) | $110,000 – $170,000 |
| Structural retrofit or foundation repair (as needed) | $8,000 – $30,000 |
Sloped lots, older foundations, and needed seismic upgrades push the numbers up in La Crescenta-Montrose faster than almost anything else. Whatever the final figure is, you see it in writing before any work starts, and that number is the number on the final invoice.
Neighborhoods We Serve in La Crescenta-Montrose
We work across the whole La Crescenta-Montrose area, from Foothill Boulevard up into the hills and across the Glendale and Montrose sides alike. Response time for a site visit is generally within a few business days, depending on our schedule that week.
- Montrose
- La Crescenta
- Sparr Heights
- Whiting Woods
- Briggs Terrace
Service Area – Cities Near La Crescenta-Montrose
Fielding ADU Builders serves La Crescenta-Montrose and the surrounding region. Dispatch and scheduling are coordinated from the brand’s Los Angeles office, with crews serving La Crescenta-Montrose locally. We also work in Los Angeles, CA, Long Beach, CA, Anaheim, CA, and Riverside, CA.
Serving La Crescenta-Montrose, CA - Our Local Coverage Area
We’re based in the La Crescenta-Montrose area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About ADU Company in La Crescenta-Montrose

Yes. Every ADU, garage conversion, and room addition we build in La Crescenta-Montrose is permitted through Los Angeles County, and inspections are passed before we consider the job done. No permit, no work. Call (361) 315-4177 to talk through your project.
Plan on roughly 6 to 12 months from permit submittal to final inspection, depending on scope, site conditions, and county review times. Hillside lots and variance requests add time. We give you a written schedule with the written price, so you know what to expect.
No. The price we put in writing before work starts is the price on the final invoice. If the scope changes because you change the scope, we put that change in writing too, before the extra work begins. Call (361) 315-4177 for a free estimate.
Every Fielding ADU Builders crew member is background-checked and arrives in uniform. You know exactly who is on your property every day. And a live person answers our phone 24 hours a day, 7 days a week. Call (361) 315-4177 anytime.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What La Crescenta-Montrose Customers Say
"Room addition over the back patio. Framing is square, windows are tight, and the roofline matches."
- Danny L."Foundation and slab poured on schedule. Crew kept the yard orderly."
- Marian J."Garage conversion with a new bath and kitchenette. Permit was handled by them. Inspection passed first time."
- Sheila B.



