ADU Company in Arcadia, CA
Lodgewick ADU Builders is the ADU company of the Kingswell family, and we work across Arcadia from the flat ranch neighborhoods south of the 210 up through the estate-scale lots below the San Gabriel foothills. Arcadia ADU work is different from what contractors see in Monrovia or Temple City: large lots, strict design standards, and summer heat that punishes a poorly sized HVAC system. If you’re planning an accessory dwelling unit, garage conversion, or home addition here, call (254) 602-5618 for a written, no-hassle price.
Why Arcadia Homes Are Different
Most of Arcadia’s core housing stock is 1950s through 1970s ranch and traditional single-story homes on generously sized lots. In the northern third of the city, you’ll find estate-scale properties with oversized two and three car garages that make natural conversion candidates. Many of these older homes have already been partially or fully rebuilt by wealthy buyers, which means our crews regularly coordinate ADU work alongside fresh permits on new-construction main houses.
The climate shapes every project. Arcadia sits on the alluvial fan of the San Gabriel Mountains and summer temperatures routinely pass 100°F. A detached ADU doesn’t get the thermal mass benefit of a main house, so HVAC sizing is critical from day one. In the Highlands and upper residential streets, we also deal with elevated fire hazard severity zones. That triggers Class A roofing and ember-resistant vent requirements, even for a rear-yard structure. We plan for these from the first site visit, not after the permit office flags them.
Arcadia’s city design standards are the single biggest local variable. The city requires ADUs to match the architectural character of the primary residence. A detached ADU behind a newly built Chinese Modern or Mediterranean spec home must mirror its roofline pitch, facade materials, and window articulation. Contractors coming up from El Monte or Monrovia routinely under-bid their first Arcadia job because they underestimate that framing and design cost.
Our Main Arcadia Services
Arcadia homeowners call us most often about three projects: home additions, garage conversions, and full ADU builds. Each one has its own dedicated page with local pricing and details.
Home Addition Contractor in Arcadia
Adding square footage to an Arcadia ranch or a newly rebuilt spec home usually means one of two things: extending the footprint into a large rear yard, or going up on a single-story structure. Local roof pitches and the city’s architectural matching rules apply either way. On foothill lots, any addition that touches the roofline puts ember-resistant requirements into play. We price the design work, permits, and framing as one written number before anything starts. See the full breakdown on our Home Addition Contractor in Arcadia page.
Garage Conversion Contractor in Arcadia
Arcadia’s oversized 2 and 3 car garages, especially on the estate-scale lots north of Huntington Drive, convert well into living space. The catch is that most of these garages were built in the 1950s and 1960s: slab foundations are often thinner than modern code, and walls rarely have insulation. We handle the engineering, HVAC design, and finished interiors as one scope with one written price. Details are on the Garage Conversion Contractor in Arcadia page.
ADU Builders in Arcadia
Upper Arcadia’s large R-1 parcels, many running 15,000 to 25,000 square feet, make detached ADUs the default choice here. What we see most often in this city is a full-featured structure: separate kitchen, private entrance, living quarters sized for grandparents, not a studio rental. The design standards and lot layouts are specific enough that we’ve dedicated a full page to it. Read the ADU Builders in Arcadia page for pricing and process.
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 Arcadia
We work hands-on with several prefab ADU manufacturers and materials suppliers that fit Arcadia lots well, including Cover, Dvele, Mighty Buildings, and Boxabl. Our teams are familiar with each brand’s panel systems, lead times, and foundation needs, so we can match the right one to your lot, budget, and timeline. See our brands for the full list we install and support.
Pricing for ADU Company in Arcadia, CA
| Service | Typical range in Arcadia |
|---|---|
| Detached ADU (1-bed, 400 – 500 sq ft) | $180,000 – $260,000 |
| Detached ADU (2-bed, 700 – 900 sq ft) | $260,000 – $380,000 |
| Garage conversion (400 – 500 sq ft, finished) | $95,000 – $140,000 |
| Garage conversion with new detached garage rebuild | $170,000 – $230,000 |
| JADU (junior ADU, 300 sq ft within existing home) | $70,000 – $110,000 |
| Home addition (400 – 600 sq ft, single-story bump-out) | $130,000 – $190,000 |
| Home addition (600 – 1,000 sq ft, full wing) | $200,000 – $320,000 |
| Architectural design and permit set only | $12,000 – $22,000 |
| Site prep, foundation, and utilities for prefab ADU | $40,000 – $65,000 |
| Full prefab ADU project (including unit, site work, finishes) | $220,000 – $350,000 |
Two things push Arcadia prices above neighboring cities. First, the architectural matching requirement: mirroring a custom home’s roofline and facade materials adds real framing and design cost. Second, foothill-zone fire requirements, where Class A roofing and ember-resistant vents apply even to a rear-yard structure. You’ll get a written price before any work starts, every time.
Neighborhoods We Serve in Arcadia
We work across the whole city, from the flat ranch blocks south of the 210 up through the foothill streets. These are the areas we see most often.
- Upper Arcadia (north of Huntington Drive)
- The Highlands
- Santa Anita Village
- Baldwin Stocker area
- Lower Arcadia (south of the 210)
Most Arcadia projects are scheduled within about a week of the written estimate, though design and permit review with the city adds its own timeline. Call (254) 602-5618 and we’ll give you a straight schedule.
Service Area – Cities Near Arcadia
Beyond Arcadia, our crews also serve the surrounding foothill and San Gabriel Valley communities. We regularly work in Monrovia, CA, Temple City, CA, Sierra Madre, CA, and San Gabriel, CA. Each city has its own permit quirks and lot patterns, and we plan for them the same way we do here.
Serving Arcadia, CA - Our Local Coverage Area
We’re based in the Arcadia 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 Arcadia
Arcadia’s planning department typically takes four to eight weeks for ADU plan review, depending on whether your project triggers design review. A detached ADU behind a custom home almost always does. We submit complete sets the first time, which shortens the back-and-forth. Call (254) 602-5618 for a schedule based on your specific lot.
Yes. Arcadia’s design standards require ADUs to match the architectural character of the primary residence, including roofline pitch, facade materials, and window articulation. This is a bigger cost driver in Arcadia than almost anywhere else in the San Gabriel Valley. We factor it into every written price up front.
We can. Upper Arcadia and Highlands lots often sit in elevated fire hazard severity zones, which means Class A roofing and ember-resistant vents on the ADU even if it’s detached. We’ve handled these requirements many times and price them from the first site visit, not as a surprise change order.
No. Every Lodgewick ADU Builders project gets a written price before work begins, and we don’t change it at the door. If something unexpected comes up on your Arcadia lot, we discuss it with you in writing before doing anything. The 365-Day Done Right Promise backs every job in writing.
If you’re weighing an ADU, garage conversion, or home addition in Arcadia, start with a real number. Call (254) 602-5618 for a free estimate and a written price, and we’ll send someone to look at your lot.
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 Arcadia Customers Say
"Garage conversion into a studio for our teenager. Honest about what was realistic and what wasn't, finished close to schedule, and cleaned up the site daily."
- Marcus Beaumont"I was nervous about adding on but they walked me through every step and every cost before we started. No surprise change orders halfway through like I'd heard horror stories about."
- Eleanor Pratt"Junior ADU conversion inside the house. They protected the rest of our place with plastic and daily cleanup. Done nearly on schedule and on the number they quoted."
- Sabrina Veld