A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Orange, CA
Benson ADU Builders is an ADU company serving Orange, CA, with written pricing before any work begins and a 365-Day Done Right Promise on every project. Orange homeowners adding a backyard unit or expanding a home deal with a specific mix of 1950s to 1970s ranch houses, compact lots, and city permit requirements that reward a contractor who plans carefully and prices honestly. Call (903) 568-7222 for a free estimate, and you’ll get a real number in writing, not a verbal guess.
Why Orange Homes Are Different
Most single-family homes in Orange were built between the 1950s and late 1970s, which means floor plans are modest, lot lines are tight, and original electrical panels often need a service upgrade before an ADU can be permitted. The city’s general plan and zoning code shape where a detached ADU can sit on a lot, how close it can be to a rear or side property line (that’s the setback), and how much of the lot can be covered by structures. Older Orange neighborhoods like those near the Plaza and around Chapman Avenue have mature trees and narrow driveways, both of which affect how we stage materials and where a prefab unit can be delivered.
Orange gets hot, dry summers and mild winters, so we size insulation and glazing for real cooling loads rather than a generic Southern California default. Several Orange HOAs, particularly in newer hillside developments and planned communities, have their own architectural review on top of city permits, which means the planning phase takes a little longer and requires early communication. We handle that coordination so homeowners aren’t chasing down board approvals themselves.
Our Main Orange Services
Orange homeowners call us most often for two things: building a new ADU in the backyard and adding square footage to the existing home. Each has its own Orange page with pricing and specifics.
ADU Builders in Orange
Building an ADU in Orange means sorting out setback rules, lot coverage, and utility connections early so the permit package is clean the first time. We build both site-built ADUs and prefab units from brands like Abodu and Dvele, and we’ll tell you plainly which approach costs less and fits your lot. The finished unit gets its own address, its own electrical feed, and either a shared or separate sewer connection depending on what the city approves. Read the full breakdown on our ADU Builders in Orange page.
Home Addition Contractor in Orange
A home addition in Orange often means extending a 1960s ranch outward or converting an attached garage into living space, and both paths trigger foundation, roof tie-in, and energy code work. We coordinate the structural engineering, pull permits, and keep the existing part of the house livable while we build. Written pricing before work starts means you’ll know the full scope before demo day. Get the details on our Home Addition Contractor in Orange page.
Room Addition Contractor in Orange
A room addition in Orange is the fastest way to add a bedroom, office, or family room without leaving the main structure. These projects often share a wall with the existing home, so we’re careful about foundation matching, roofline transitions, and sound isolation between old and new framing. Orange’s older homes sometimes hide surprises behind walls, which is exactly why we walk the space with you before the written quote. See our Room Addition Contractor in Orange page for pricing.
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 Orange
We build with and service prefab ADU brands including Cover, Dvele, and Mighty Buildings, plus James Hardie cladding. Panels and finish materials are ordered to the Orange job site directly, which keeps lead times shorter than chasing components across multiple suppliers. Visit our brands page to compare the options.
Pricing for ADU Company in Orange, CA
Here are typical price ranges for the work we quote in Orange. These are planning numbers, not bids – every job gets a written line-item price before work starts.
| Service | Typical range in Orange |
|---|---|
| Detached ADU (prefab, turnkey) | $180,000 – $320,000 |
| Detached ADU (site-built) | $250,000 – $450,000+ |
| Garage conversion ADU | $120,000 – $200,000 |
| JADU (attached junior unit) | $90,000 – $160,000 |
| Home addition (foundation-up) | $220 – $450 per sq ft |
| Room addition (single room) | $80,000 – $180,000 |
| Electrical panel upgrade (if required) | $2,500 – $5,000 |
| Utility trenching and connections | $3,000 – $9,000 |
| Architectural and engineering plans | $4,000 – $12,000 |
| Permit fees (city, school, utility) | $3,000 – $10,000 |
Prices in Orange climb when a lot has poor soil, when the existing panel is at capacity, or when a project requires extensive tree protection or grading work. Because our price is written before work starts, those conditions get identified in the quote, not added as a surprise later. Call (903) 568-7222 and we’ll walk the project with you.
Neighborhoods We Serve in Orange
Our crews work throughout Orange, from the tree-lined streets near the Old Towne Plaza to the hillside communities on the east side and the newer developments near the 55. Here are a few neighborhoods we regularly build in:
- Old Towne Orange
- Villa Park border area
- Orange Park Acres
- El Modena
- Santiago Hills
Most Orange projects are within 30 to 45 minutes of our dispatch point, and we schedule site visits around your availability, not ours.
Service Area – Cities Near Orange
While this page covers Orange specifically, our crews also work in neighboring cities. If you’re in Santa Ana, CA, Tustin, CA, Garden Grove, CA, or Placentia, CA, you’ll get the same written pricing, the same 365-Day Done Right Promise, and the same live person on the phone. Each city page covers local conditions in more detail.
Serving Orange, CA - Our Local Coverage Area
We’re based in the Orange 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 Orange
Yes. Every ADU, JADU, and addition we build in Orange goes through the city’s permit process, including plan check, inspections, and final sign-off. We handle that paperwork from start to finish, and the permit fees are included in your written quote. Call (903) 568-7222 to talk through your project.
If any covered work isn’t right within a full year of completion, we fix it. That promise is written on every Orange project, not just mentioned in a sales pitch. If a covered repair fails, you also get a free second visit.
We review HOA architectural guidelines early in the Orange planning process and submit the required design docs alongside the city permit application. Some HOAs add a few weeks to the schedule; we factor that into the timeline before work begins so there are no mid-project stalls. For a free estimate and a written price, call (903) 568-7222.
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 Orange 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.
