A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Covina, CA
An ADU in Covina typically runs $180,000 to $340,000 for a detached one-bedroom unit, and most projects take 6 to 12 months from permit to move-in day. Covina’s mix of 1950s ranch homes and hillside properties creates real variety in setbacks, slope, and utility access, which is why we quote only after walking the lot. Call (903) 568-7222 and we’ll schedule that walk-through.
Why Covina Homes Are Different
Covina’s housing stock tilts older, with many homes built between the 1940s and 1970s. That means narrow side yards, shallow sewer laterals, and electrical panels that often need an upgrade before an ADU can tie in. We plan for that from the first site visit, not mid-project when it becomes an expensive surprise.
Hillside lots around the northern edge of Covina, near Charter Oak and the foothills, add grading and retaining considerations that flat lots never see. A prefab panel system from Abodu or Dvele handles a sloped site with less excavation than a fully site-built frame, which keeps cost and schedule steadier. Down in the flatter grid south of Badillo Street, setbacks tend to be tighter, so we work through detached-versus-attached layouts early.
Permitting runs through the City of Covina, and ADU plan checks move faster when the drawings are complete and the property lines are already surveyed. We bring that paperwork ready. The local climate, warm and dry most of the year, is a genuine advantage: foundations and framing rarely lose weeks to weather the way they do closer to the coast.
Our Main Covina Services
Most Covina homeowners call us for one of three things: a new ADU in the backyard, a home addition that gives the main house more room, or a room addition that stretches an existing footprint. Each job starts the same way – a written price before any work begins.
ADU Builders in Covina
Backyard ADUs in Covina run from compact studio units to two-bedroom rentals with their own address. We handle the sitework, utility trenching, and the build itself, and we can pull from prefab brands like Dvele and Cover when the lot favors panelized construction over stick framing. The design has to respect Covina’s setback rules and lot coverage limits, which we map before quoting. ADU Builders in Covina
Home Addition Contractor in Covina
A home addition expands the main house, not the garage or a detached structure. In Covina, that often means a larger kitchen, a first-floor primary suite, or a second story over a single-level ranch. We match rooflines and foundation work to the existing structure, and we bring in structural engineering when the original framing needs reinforcement. Home Addition Contractor in Covina
Room Addition Contractor in Covina
A room addition is the smaller sibling: one new bedroom, an office, or a sunroom off the back of the house. These projects move faster than full additions because they touch less of the original structure. On Covina’s older lots, we spend extra care on door transitions and floor leveling so the new space doesn’t feel tacked on. Room Addition Contractor in Covina
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 Covina
We build with Abodu, Cover, Dvele, and James Hardie products, and we keep common panel and trim components moving through our Southern California yard so lead times don’t stall a Covina build. For a closer look at what each brand offers, see our brands.
Pricing for ADU Company in Covina, CA
| Service | Typical range in Covina |
|---|---|
| Detached one-bedroom ADU (prefab, turnkey) | $180,000 – $260,000 |
| Detached two-bedroom ADU (site-built) | $230,000 – $340,000 |
| Garage conversion to ADU | $120,000 – $190,000 |
| Junior ADU (attached, under 500 sq ft) | $90,000 – $140,000 |
| Home addition, ground-floor (400 – 700 sq ft) | $160,000 – $260,000 |
| Home addition, second-story | $220,000 – $350,000 |
| Room addition (200 – 400 sq ft) | $80,000 – $160,000 |
| Site work, utility trenching, and foundation | $25,000 – $60,000 |
What pushes a Covina price up: hillside grading, electrical panel replacement, and sewer line distance. What doesn’t push price up after you sign: anything we didn’t write down. Your written price covers the full scope before we start, and the 365-Day Done Right Promise backs the work for a full year.
Neighborhoods We Serve in Covina
We work across Covina and the surrounding foothill communities. Most of our Covina projects cluster in these areas:
- Charter Oak and the northern foothills
- The tree-lined streets between Citrus Avenue and Azusa Avenue
- Downtown Covina and the neighborhoods off San Bernardino Road
- The residential blocks south of Badillo Street
- Covina Hills and the Ridgeline Drive area
For most of Covina, we can have someone on-site for an estimate within a few business days of your call. Foothill addresses sometimes add a day or two for a second surveyor to check slope and drainage before we quote.
Service Area – Cities Near Covina
Our crews cover Covina and the surrounding San Gabriel Valley cities. If you’re just over the city line, we are too: Azusa, CA, West Covina, CA, Baldwin Park, CA, and Glendora, CA are all within our regular service area. Scheduling and dispatch are coordinated from the brand’s Los Angeles office, while the crews serve Covina locally.
Serving Covina, CA - Our Local Coverage Area
We’re based in the Covina 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 Covina
For estimates, most Covina homeowners see us within a few business days. The actual build starts after the City of Covina approves the permit, and we can’t shorten the city’s review clock. We can tell you exactly where your permit is at any point, because real-time tracking is part of how we work.
That depends on your specific HOA and its covenants. Some Covina HOAs restrict detached structures or require design review before you submit to the city. We’ll flag it during the site walk and help you gather whatever the HOA asks for. Call (903) 568-7222 to talk it through.
No. The written price you get before we start is the price you pay, unless you request a change to the scope. Change orders are always separate, in writing, and approved by you before any extra work begins. The 365-Day Done Right Promise also covers the completed build for a full year.
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 Covina Customers Say
"Booked a consult online and met the project manager two days later. Weekly progress updates arrived by text with photos. ADU finished on schedule."
- Hannah W."Clean, quiet crew. They respected the neighbors, kept noise to working hours, and swept the driveway every evening."
- Hope C."Communication was the best part. I always knew what was happening that week without having to ask."
- Dolly N.
