ADU Company in Alhambra, CA
Alhambra is one of the most ADU-dense markets in the San Gabriel Valley, driven by a housing stock of 1920s – 1950s bungalows with detached rear garages that convert into accessory dwelling units remarkably well. We’re Lodgewick ADU Builders, the ADU company of the Kingswell family, and we handle garage conversions, backyard ADUs, and home additions across Alhambra with written pricing before any work starts and a 365-Day Done Right Promise on every job. Russ Delmar leads our Alhambra work. Call (254) 602-5618 for a free estimate.
Why Alhambra Homes Are Different
Alhambra’s residential core reads like a map of 20th-century California building: California bungalows and Spanish Colonial Revival cottages from the 1920s and 1930s, then postwar tract homes from the late 1940s and 1950s. Nearly all of them sit on lots served by rear alleys with detached single-car garages, which is exactly why garage conversions dominate ADU inquiries here. But those garages are 70 to 100 years old, and the city’s building department routinely requires seismic bracing or cripple-wall retrofits before issuing a conversion permit. That’s not a surprise cost we want homeowners to discover mid-project. We walk the lot before we price the job.
The climate matters too. Alhambra sits inland in the San Gabriel Valley, and summer highs run well above coastal Los Angeles. A habitable ADU in Alhambra without a ductless mini-split system is a hotbox by June. We spec them as standard on every conversion and new build here, not as an upgrade. Older homes also tend to have galvanized supply lines and 60 to 100-amp electrical panels, so a service upgrade to 200 amp is part of nearly every garage-to-ADU job we quote in Alhambra. Planning for it from day one keeps the written price honest.
One more thing worth knowing: Alhambra runs its own municipal building and planning department, entirely separate from LA City and LA County. Its ADU ordinance, plan-check queue, and fee schedule are Alhambra’s alone. Contractors who carry assumptions from nearby county work into an Alhambra submittal usually lose weeks. We submitt to Alhambra’s checklist, not a generic one.
Our Main Alhambra Services
Most Alhambra homeowners call us about one of three things: adding square footage to the main house, converting a detached garage into a livable unit, or building a new ADU from the ground up. Each has its own page, because each has its own Alhambra-specific permitting path and price range.
Home Addition Contractor in Alhambra
Home additions in Alhambra tend to run two directions: expanding a bungalow’s footprint for a growing household, or adding a primary suite so aging parents can live on the same lot without sharing the main house’s stairs. The 1920s-to-1950s construction here means additions almost always trigger foundation work, roof tie-ins, and electrical panel upgrades before framing goes up. We price those conditions into the written estimate before you sign anything. Home Addition Contractor in Alhambra covers what a realistic addition costs here and how the permit path works.
Garage Conversion Contractor in Alhambra
The rear-alley garage grid in Alhambra is practically purpose-built for conversion: detached, already on the lot line, and usually within a few feet of the existing sewer and power. The catch is age. Original garages from the 1920s to 1950s often sit on thin slabs, lack proper footings, and were never designed for habitation. Seismic retrofits, new slab ties, and a 200-amp service upgrade are the standard opening moves. Garage Conversion Contractor in Alhambra explains what a conversion involves from start to finish.
ADU Builders in Alhambra
New ground-up ADUs are the fastest-growing segment in Alhambra, and multigenerational in-law suites lead the charge. A large share of Alhambra households are first- and second-generation Chinese immigrant families, and culturally, parents living on the same lot in their own unit is common and expected. That pattern shows up in every plan set: wider doorways, ground-floor sleeping space, and kitchens sized for actual cooking. ADU Builders in Alhambra details the new-build process, including prefab options from Abodu and Dvele that we handle for local lots.
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 Alhambra
We work hands-on with established ADU brands including Abodu, Cover, and Mighty Buildings. If you own or are considering one of these units and need site prep, foundation work, utility tie-ins, or finish work in Alhambra, we’re familiar with their specs and installation requirements. See our brands for the full list.
Pricing for ADU Company in Alhambra, CA
| Service | Typical range in Alhambra |
|---|---|
| Detached garage conversion to ADU | $128,000 – $210,000 |
| Attached garage conversion to ADU | $95,000 – $160,000 |
| New detached ADU (site-built) | $165,000 – $285,000 |
| Prefab ADU (Abodu, Cover, Mighty Buildings) | $145,000 – $260,000 |
| JADU (junior ADU conversion) | $65,000 – $110,000 |
| Garage conversion + separate new ADU | $295,000 – $430,000 |
| Home addition (single room) | $68,000 – $115,000 |
| Home addition (primary suite) | $120,000 – $195,000 |
| Electrical panel upgrade to 200 amp | $2,800 – $4,500 |
| Ductless mini-split HVAC (per unit) | $4,200 – $8,500 |
| Seismic retrofitting (cripple wall and bracing) | $6,500 – $14,000 |
Price gets pushed up in Alhambra by three things we see regularly: full electrical upgrades from the original 60 – 100 amp panels, seismic retrofits on pre-1950 garages, and asbestos or lead-paint remediation on older building materials. Our practice is a written price before any work begins, and that price does not change at the door.
Neighborhoods We Serve in Alhambra
We work across the full Alhambra grid, from the older bungalow pockets near Main Street to the postwar tract blocks further east. Response time across the city is typically same-week for site visits and estimates, and we schedule around your lot’s access. Neighborhoods we serve often include:
- Alhambra’s Midwick district and surrounding blocks
- The North Alhambra heritage neighborhoods
- Glenview area and the Alhambra Golf Course corridor
- The Emery Park and Story Park neighborhoods
- Alhambra’s eastern residential pockets near San Gabriel
Service Area – Cities Near Alhambra
Our Alhambra crews also handle jobs in the surrounding San Gabriel Valley cities. If your lot is across the city line, we regularly serve South Pasadena, CA, San Marino, CA, Monterey Park, CA, and San Gabriel, CA. Each city has its own building department and permitting rhythm, which we factor into every written estimate.
Serving Alhambra, CA - Our Local Coverage Area
We’re based in the Alhambra 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 Alhambra
Site visits and written estimates typically happen within the same week you call us. The Alhambra plan-check queue itself is the variable we can’t control: it runs on the city’s municipal department schedule, which is separate from LA County. We submit clean plans the first time to avoid resubmittal delays. Call (254) 602-5618 to schedule your free estimate.
Yes. We pull all required permits directly with Alhambra’s own building and planning department, including seismic retrofit approvals and electrical service upgrade permits. Every build or conversion we do includes permits pulled and inspections passed. Call (254) 602-5618 if you want us to look at your lot before you commit to anything.
Yes. Our Alhambra crews also serve nearby cities including South Pasadena, San Marino, Monterey Park, and San Gabriel, each with their own permitting requirements. If you’re just outside Alhambra, call (254) 602-5618 and we’ll confirm your address is in our service area and schedule a free estimate.
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 Alhambra Customers Say
"Garage conversion into an office and guest room. Fair written price, finished close to on schedule, and they fixed a small drywall crack under warranty months later without any hassle."
- Diana Cho"The ADU came out beautiful and the permitting, which terrified me, was handled start to finish. They kept me updated every week so I was never wondering what was happening."
- Shauna Mills"A whole backyard ADU from scratch. Terrified me going in, but they kept me updated weekly and there were no nasty surprises. Quality work and a fair price."
- Noreen Fletcher