A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Pasadena, CA
ADU construction in Pasadena follows a different set of rules than almost anywhere else in Los Angeles County. The city’s early adoption of permissive state ADU laws has made permitting faster than in neighboring cities, yet strict design review in historic districts means a Craftsman-era lot needs an ADU that looks like it belongs there, not one that was dropped in. Homeowners call us at (626) 657-5461 because they want both: a streamlined approval and a structure that respects the house it sits behind.
Why Pasadena Homes Are Different
Pasadena’s housing stock runs heavily toward early 20th-century Craftsman and Spanish Colonial Revival homes, many on lots large enough to hold a detached ADU without crowding the main house. That lot size is a quiet advantage: a rear-yard ADU in Pasadena often has more room to breathe than one in a denser city. The tradeoff is that Bungalow Heaven and other landmark districts frequently require matching rooflines, window proportions, and siding details to the original structure. A garage conversion in Pasadena also tends to involve older framing than a newer build, which means our crews spend more time checking beam condition than they would in a 1990s subdivision.
The climate shapes the work, too. Pasadena’s hot, dry summers mean cooling design matters as much as insulation, and hillside lots face the city’s hillside ordinance, which can reduce allowable ADU footprint on sloped terrain. Homeowners in areas near the San Gabriel foothills should expect a site-specific review before any square footage is committed. That’s standard for Pasadena, and it’s one reason our written estimate is the first step, not a verbal guess.
Our Main Pasadena Services
Most Pasadena homeowners reach out about one of three projects: adding square footage to the main house, converting an existing detached garage, or building a new ADU from the ground up. Each has its own Pasadena-specific page below.
Home Addition Contractor in Pasadena
A home addition in Pasadena usually means matching a 1920s exterior so the new section doesn’t read as an afterthought. We work with the city’s design review expectations from the first drawing, which helps avoid the back-and-forth that stalls many additions here. Crews protect the lived-in part of the house while framing happens on the other side of the wall. Read the full overview on our Home Addition Contractor in Pasadena page.
Garage Conversion Contractor in Pasadena
Pasadena has a large stock of detached garages built alongside the original homes, and many sit underused. Converting one into an ADU keeps the structure’s existing footprint, which can simplify setback questions on tight lots. Older garage slabs and framing sometimes need reinforcement before drywall goes up, and we include that in the written price rather than discovering it mid-project. Details are on our Garage Conversion Contractor in Pasadena page.
ADU Builders in Pasadena
A new detached ADU in Pasadena gives families a separate structure with its own entrance, kitchen, and bath. On larger lots near the Arroyo Seco or in neighborhoods like Linda Vista, a rear-yard placement often works well without disturbing the main home’s outdoor space. We coordinate the site work, utility connections, and the build itself. More on the process and Pasadena specifics is on our ADU Builders in Pasadena page.
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 Pasadena
We install and finish ADUs from James Hardie, Abodu, Cover, and Dvele, among others. Homeowners choose the product that fits their lot and their budget; we handle the labor, permits, and finish work. Visit our brands page for the full list.
Pricing for ADU Company in Pasadena, CA
| Service | Typical range in Pasadena |
|---|---|
| Detached ADU, 400 sq ft studio | $120,000 – $180,000 |
| Detached ADU, 800 sq ft (1 bed / 1 bath) | $200,000 – $280,000 |
| Detached ADU, 1,200 sq ft (2 bed / 2 bath) | $300,000 – $400,000 |
| Garage conversion to ADU (400 – 600 sq ft) | $90,000 – $150,000 |
| Garage conversion with structural repair | $130,000 – $200,000 |
| Home addition, 300 – 500 sq ft | $150,000 – $250,000 |
| Home addition, 500 – 800 sq ft | $250,000 – $400,000 |
| Kitchen extension (200 – 300 sq ft) | $100,000 – $175,000 |
| Permit and design package (varies by district) | $8,000 – $20,000 |
Historic district review and hillside ordinance compliance are the two factors that most often push Pasadena pricing toward the upper end of those ranges. Every family receives a written price before any work starts, and that number does not change when the crew arrives.
Neighborhoods We Serve in Pasadena
Our crews work across the city, from the flats near Orange Grove to the hillside streets of Annandale. We adjust our schedule around school drop-off and nap hours where we can, and we keep the sidewalk clear.
- Bungalow Heaven
- Madison Heights
- Linda Vista
- Annandale
- San Rafael
Service Area – Cities Near Pasadena
While this page covers Pasadena jobs, our crews also serve nearby communities for homeowners who need the same written-price approach. You can read about ADU work in San Marino, CA, Alhambra, CA, Sierra Madre, CA, and Rosemead, CA on their own pages.
Serving Pasadena, CA - Our Local Coverage Area
We’re based in the Pasadena 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 Pasadena
Pasadena’s early adoption of state ADU laws means standard projects often clear permit review in 3 to 6 months. Historic district projects and hillside lots take longer because design review is more detailed. We handle the submittal for you and track it through approval. Call (626) 657-5461 for a realistic timeline on your specific lot.
In landmark districts like Bungalow Heaven, yes, the city typically requires matching rooflines and window proportions to the original Craftsman. Outside those districts, the rules are looser, though design review still expects a structure that fits the lot. We prepare plans with those expectations in mind from day one.
Hillside lots are subject to the city’s hillside ordinance, which can reduce allowable ADU footprint and add engineering requirements for foundations and drainage. It’s buildable in most cases, but the footprint may be smaller than a flat lot would allow. We assess the slope before any pricing is finalized. Call (626) 657-5461 for a free estimate.
If you’re weighing an ADU, garage conversion, or home addition in Pasadena, call us at (626) 657-5461. Ben Ortega and our team will walk your lot, answer your questions honestly, and put a written price in your hands before anything else happens.
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 Pasadena Customers Say
"Added a backyard cottage. The team protected our existing landscaping and left the yard clean every evening. Gentle, respectful, and they walked us through each stage calmly."
- Tamara Welsh"They converted our garage and were so mindful that we were living right there through it. Quiet hours respected, site swept, nothing left out where the kids play. Lovely work."
- Eugene Park"Built a backyard unit for us. For a months long project the crew kept the site remarkably tidy, swept daily, and were respectful of our neighbors and our dog. Beautiful result."
- Charlotte Vey
