A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Highland, CA
Highland homeowners call us when they want an accessory dwelling unit, a home addition, or a room addition on a lot that has to work around real constraints: aging 1950s and 1960s housing stock, clay-heavy soil in older neighborhoods, and a local permitting office that expects plans to be right the first time. We’re Sutton ADU Builders, and every Highland project starts with a written price before any work begins, plus a 365-Day Done Right Promise covering workmanship for a full year. Call (472) 248-8213 to talk through your lot in plain terms.
Why Highland Homes Are Different
Highland sits on gently sloping terrain between the San Bernardino foothills and the flatlands toward San Bernardino and Loma Linda. That slope shows up in foundation work more than homeowners expect. A detached ADU on the upper streets near Baseline or Victoria often needs stepped footings or extra grading, which adds cost before the first wall goes up. On the flatter lots south of the 210, drainage is the bigger concern: many Highland yards pool water after a good January rain, and a new structure changes the runoff pattern.
The housing stock is mostly mid-century ranch homes and 1970s track builds, with some newer subdivisions east toward East Highland. Many of these homes were built before current setback and lot-coverage rules, which means adding square footage usually triggers a conversation with the Highland planning desk about how much of the lot can legally be built on. We handle that conversation for you, because it’s the point where vague quotes turn into real numbers.
Our Main Highland Services
Highland homeowners most often call us about adding square footage to a home they already love, and about building a separate ADU out back. Each service has its own Highland page with full details and pricing.
Home Addition Contractor in Highland
A home addition in Highland usually means expanding sideways on a wide mid-century lot or adding a second-story bump on a smaller one. The local pieces that matter: matching roof pitch to the original house, upgrading an older electrical panel to carry the new load, and keeping the addition within Highland’s lot-coverage limits. We lock a written price before demolition starts, so you know the exact cost before dust flies. See the full scope and local pricing on our Home Addition Contractor in Highland page.
ADU Builders in Highland
Highland lends itself to detached ADUs, especially on deeper lots where the garage sits forward and the back yard opens up. We’ve guided homeowners through setbacks (the required gap between your new structure and the property line), utility runs, and which prefab line makes sense for their lot. A detached ADU in Highland often needs new gas and electrical laterals from the street, so we price that upfront. Full detail is on the ADU Builders in Highland page.
Room Addition Contractor in Highland
Sometimes Highland homeowners don’t need a whole wing, just one more room: a home office, a ground-floor bedroom for an aging parent, a bigger kitchen. These jobs still touch the same local realities: slab foundations in older homes, stucco matching, and panel capacity. We treat a single-room addition with the same written-price and Threshold Verified crew standards as a full ADU. Read the local breakdown on the Room Addition Contractor in Highland 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 Highland
We work with prefab and modular ADU lines including Abodu, Cover, and Dvele, and we can give you honest guidance on which fits a Highland lot and budget. Common hardware and finish materials are stocked at Inland Empire suppliers, which keeps typical turnaround reasonable. See the full list on our brands page.
Pricing for ADU Company in Highland, CA
| Service | Typical range in Highland |
|---|---|
| Detached ADU (400 – 800 sq ft) | $180,000 – $320,000 before site work |
| Detached ADU (800 – 1,200 sq ft) | $280,000 – $450,000 before site work |
| Garage conversion ADU | $90,000 – $160,000 |
| Primary home addition (400 – 800 sq ft) | $160,000 – $300,000 |
| Primary home addition (800 – 1,200 sq ft) | $260,000 – $440,000 |
| Room addition (single room) | $70,000 – $130,000 |
| Bathroom addition | $45,000 – $90,000 |
| Kitchen expansion | $55,000 – $110,000 |
What pushes a Highland price up is usually site work: slope corrections, drainage improvements, or the need to trench new utility lines across a long lot. Permits and plan-check fees add another layer, and we itemize all of it in your written price so there’s no surprise invoice later.
Neighborhoods We Serve in Highland
We take on ADU and addition work throughout Highland, from the older streets near Baseline to newer builds in East Highland. Scheduling depends on the workload that week, but most Highland projects can be quoted within a few days of the first call.
- East Highland
- North Highland near Baseline
- Areas around Victoria Elementary
- Neighborhoods south of the 210 toward San Bernardino
- Foothill-adjacent lots on the northern edge of town
Service Area – Cities Near Highland
We serve Highland directly, and homeowners just over the city line often ask us to look at their lots too. That includes San Bernardino, CA, Loma Linda, CA, Redlands, CA, and Mentone, CA. If you’re a few minutes outside Highland, call and we’ll confirm coverage on the spot.
Serving Highland, CA - Our Local Coverage Area
We’re based in the Highland 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 Highland
We can usually schedule a site visit and deliver a written quote within a few business days of your call to (472) 248-8213. Actual construction start depends on Highland permit timelines, which vary by project type and current city workload.
Yes. We prepare plans for Highland’s planning desk, pull the permits, schedule inspections, and stay on the job until final sign-off. You don’t have to chase the city; that’s part of the written scope we price upfront.
We review your HOA’s architectural guidelines at the quoting stage. Some Highland HOAs restrict detached structures or require specific exterior finishes, and we factor those requirements into the plan before you commit to anything.
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 Highland Customers Say
"Insulated the walls and ceiling properly. It stays comfortable even in July."
- Tamika W."They handled the drawings and the permit paperwork for us. All I had to do was pick the finishes."
- Rosa M."Every crew member was vetted and carried a badge, which matters when they are around your family for months. Tidy site every day."
- Daniel F.
