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
Covina homeowners adding an ADU, converting a garage, or building a room addition are working with a specific kind of property: 1950s and 60s ranch homes on 7,000-plus square foot lots, clay-heavy foothill soil, and a city permitting process that pays close attention to hillside grading and oak tree preservation. Fielding ADU Builders handles all three project types here, with a written price before any work starts and a one-year guarantee on every job. Call (559) 238-9583 to schedule a free estimate.
Why Covina Homes Are Different
Covina’s housing stock runs heavy to single-story ranches built between 1950 and 1970, most with detached garages and generous rear yards. That’s good news for ADU placement: the lot depth usually gives us room to work without triggering a variance. The complications come from what’s underneath and around the house. Foundation types vary block by block, from raised to slab, and older homes frequently carry undersized electrical panels that need an upgrade before an ADU can pull power. In Covina Hills, hillside and oak tree preservation rules add review layers that flatland cities like West Covina don’t impose. A project that sails through plan check in one neighborhood can sit for extra weeks in another because of a protected tree canopy or a slope condition.
Our Main Covina Services
Most Covina homeowners call us for one of three projects. Each has its own dedicated Covina page with local pricing and details.
Room Addition Contractor in Covina
Room additions in Covina usually attach to the back or side of the existing home, matching roof pitch and siding so the addition doesn’t read as an afterthought. The older ranch footprint often means working around a raised foundation, and the clay-heavy soil in foothill areas can require deeper footings than a flatland build. We pull permits, handle the plan check, and write the price before demolition starts. For the full breakdown, see our Room Addition Contractor in Covina page.
Garage Conversion Contractor in Covina
Covina’s detached garages, common on ranch lots, convert cleanly into living space without altering the home’s roofline. The work usually involves framing the garage-door opening, insulating, running new electrical, and often upgrading the panel. In the Charter Oak neighborhood, where backyards slope toward flood channels, we also address drainage and slab elevation so the converted space stays dry. Details are on our Garage Conversion Contractor in Covina page.
ADU Builders in Covina
Backyard ADUs on Covina’s large lots give us room for detached units, though setback rules and oak tree protection in Covina Hills can shape where the unit sits. We build both site-built and prefab ADUs, and we’ll tell you which method fits your lot and budget before any money changes hands. Permits, foundation, utility connections, interior finish: all covered by the same written price and one-year guarantee. See our ADU Builders in Covina page for local costs.
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 work with several prefab and modular platforms Covina homeowners ask about most, including Abodu, James Hardie, and Tuff Shed-style structures. Parts and finishes for these systems are readily available in the Los Angeles supply chain, so scheduling stays predictable. Some of our crews are cross-trained on multiple platforms; see our brands for the full list.
Pricing for ADU Company in Covina, CA
| Service | Typical range in Covina |
|---|---|
| Garage conversion (standard, before permit fees) | $80,000 – $130,000 |
| Garage conversion (with HVAC and utility upgrades) | $90,000 – $150,000 |
| Detached ADU, site-built (400 – 600 sq ft) | $170,000 – $245,000 |
| Detached ADU, site-built (600 – 900 sq ft) | $225,000 – $360,000 |
| Detached ADU, prefab (400 – 600 sq ft) | $130,000 – $210,000 |
| Detached ADU, prefab (600 – 900 sq ft) | $180,000 – $300,000 |
| Room addition (ground floor, 300 – 500 sq ft) | $95,000 – $170,000 |
| Room addition (with kitchen or bath) | $150,000 – $250,000 |
Two things push Covina prices toward the upper end of those ranges: hillside foundation work in Covina Hills and electrical panel upgrades on older ranch homes. Whatever the final number, it goes in writing before we start, and it’s the same number on the final invoice. No change orders hidden in the fine print.
Neighborhoods We Serve in Covina
Our crews work throughout Covina, including the hillside lots where foundation and grading take longer to permit and build. Most of our Covina estimates are scheduled within a few business days of the first call.
- Covina Hills
- Charter Oak
- Downtown Covina
- Northview
- South Hills
Service Area – Cities Near Covina
Fielding ADU Builders serves Covina and the surrounding communities, so if you’re in a neighboring city, we can usually reach you on the same schedule. We also work in West Covina, CA, Baldwin Park, CA, Walnut, CA, and Hacienda Heights, CA.
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
Plan check timelines in Covina vary by neighborhood. Flat-lot projects in the ranch-home grid usually clear faster than hillside or oak-tree-adjacent sites, where review adds extra weeks. We can give you a realistic schedule after a site visit. Call (559) 238-9583 to set one up.
Yes. We pull all Covina permits, schedule inspections, and meet the inspector on site. Any required corrections are addressed before the next phase. Permit fees are separate from our construction price and are listed as a line item in your written estimate, so nothing arrives as a surprise.
We do. Some Covina HOAs have their own design-review process on top of city permits, particularly for detached ADUs. We handle the HOA application paperwork and build to whatever conditions the association requires. The written price covers our work on the application; HOA fees themselves are paid directly to the association.
Call (559) 238-9583 to schedule a free estimate. A live person answers, 24 hours a day.
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
"Garage conversion with a new bath and kitchenette. Permit was handled by them. Inspection passed first time."
- Sheila B."Built a detached ADU behind our house. The builder is a veteran and runs the site like a platoon: schedule posted, crew on time, everything labeled. Finished within a few days of the date."
- Ken W."Honest feedback on what the lot could fit. Told me up front what would fit on the lot and what the setbacks would allow."
- Rita C.
