A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable ADU Builders Across Redlands
ADU construction in Redlands typically runs $180 – $420 per square foot depending on whether you’re converting a garage, building a detached unit, or installing a prefab kit, and most projects clear the city’s plan check in 90 to 180 days before construction starts. That’s the honest range, and it’s what you need to know before you call anyone. Fielding ADU Builders has been building to The Garrison Standard since 2006, and Redlands homeowners call us because we put the price in writing before a single nail is driven. If you’re weighing a JADU, a detached ADU, or a garage conversion near Smiley Park or South Redlands, call (361) 315-4177 and Reed Calloway will walk you through what the city will actually require.
Why Fielding ADU Builders Is Redlands’s Preferred ADU Builders Company
Redlands runs its own building department, not a county counter you can breeze through. That changes how an ADU gets approved here, and it’s why local knowledge matters more than a glossy bid. Our ADU Builders team has moved projects through Redlands plan check, fire plan review, and historic-preservation design review, and we know which parcels trigger which path. A homeowner near the University of Redlands faces a different entitlement route than someone out toward Crafton or the newer subdivisions near Citrus Plaza, and we price accordingly.
The Garrison Standard is what sets us apart in Redlands. Every project gets a written price before work starts. Every project gets a written one-year guarantee: if the work fails within 365 days, we come back and make it right at no charge. Our crews are background-checked and arrive in uniform, so the people on your property are the people we said would be there. And when you call, a live person answers, 24 hours a day, seven days a week. No voicemail tree.
We coordinate Redlands scheduling from the brand’s Inland Empire office, and crews serve the city locally. You won’t have to explain your street to three different dispatchers.
JADU in Redlands
A JADU, or junior accessory dwelling unit, is a permitted living space created entirely within the walls of an existing single-family home in Redlands, often by converting an attached garage or a large bedroom into a compact studio with its own entrance, kitchenette, and bath. Redlands homeowners choose a JADU when they want rental income or a place for family without the cost and setback complications of a detached build. A JADU in Redlands typically runs $80,000 to $150,000, and because it stays inside the existing footprint, it often skips some of the site work that drives detached ADU pricing higher.
Garage Conversion JADU Path
On older Redlands lots, attached garage conversions are the most common JADU route. The catch is the existing slab and utility trench. Redlands inspectors routinely flag trench depth and slab thickness on pre-1980 garages, and if the slab can’t support the finished floor assembly, you’re looking at a re-pour before framing starts. We check that first, before you sign anything.
Interior Room JADU Path
If the home has a large bedroom or den with an exterior wall, a JADU can often be carved out without touching the foundation. Redlands requires a separate entrance or a shared entrance with an interior lock-off door, plus a kitchenette with a sink and a small cooking appliance. These projects move faster through plan check because they don’t touch the building envelope.
ADU Plans in Redlands
ADU Plans are the full construction drawing set and entitlement package Redlands Planning and Building & Safety will review before issuing a permit, and in this city the plan set has to do more work than it does in neighboring jurisdictions. A Redlands ADU Plans package typically runs $6,000 to $15,000 depending on whether the parcel sits inside a historic-preservation district, whether fire plan check requires a rated assembly, and whether setbacks need a variance. This is the single most important line item to get right before construction starts, because a plan set that gets bounced wastes weeks and adds re-submittal fees.
Historic District Design Review
Much of Redlands’ core sits under a historic-preservation overlay. If your lot falls inside a mapped district, the city will route your ADU through design review, and that means the elevations, materials, and roof form have to match the established character of the neighborhood. We stage the design-approval submission before demolition or site work, so the schedule doesn’t idle while the review runs.
Fire Separation and Setback Sheets
On lots where the existing house and the proposed ADU sit close together, Redlands Fire plan check requires a rated assembly at the facing walls. The plans need to show that detail explicitly, with the correct UL assembly number and a full section cut. A plan set that glosses over this is the number one reason ADU plans get kicked back.
Trusted Brands We Service in Redlands
We work with the platforms Redlands homeowners are already researching online. Prefab and modular systems from Abodu, Cover, and Dvele can cut weeks off the framing phase when the site works, and we install them alongside conventional builds using James Hardie siding. For Redlands customers, having a builder fluent in both means we’re not locked into one method. We stock access to local parts and material channels in the Inland Empire, so a change order on siding or a rated-assembly detail doesn’t stall the job. If you’ve been comparing kit prices on Boxabl or Plant Prefab, tell us which one you’re looking at and we’ll tell you honestly whether it fits your lot and your budget in Redlands.
Common ADU Builders Problems We See in Redlands Homes
- Historic-preservation surprises. A homeowner gets a flat per-square-foot quote from an out-of-town builder, then finds out the lot sits in a historic district. Design review adds weeks and a design-fee line item nobody mentioned. We check the parcel’s status before we quote.
- Garage slab failures on older lots. Redlands homes built before 1980 often have garage slabs too thin for a permitted JADU conversion. The inspector flags the trench depth and slab thickness, and the project re-pours before framing starts. We test the slab early.
- Wrong fire-separation detail. On lots where the house and the detached unit sit close together, Redlands Fire plan check requires a specific rated assembly. A plan set drawn to the generic state standard gets rejected. We draw the detail Redlands actually enforces.
- Variance mis-pricing on narrow lots. Some Redlands lots need a setback variance to fit a detached ADU. That’s a written request to the city to build closer to the property line than the standard rule allows, and it has its own fee and review timeline. A bid that doesn’t account for it under-prices the job and the price moves later.
Pricing for ADU Builders in Redlands, CA
Here are the ranges we quote in Redlands today. A garage conversion typically runs $120,000 to $200,000 before permit fees, depending on whether the slab can be reused. A detached backyard ADU runs $200,000 to $380,000 for a 500 to 800 sq ft unit, with prefab panelized kits from Abodu or Dvele landing on the lower side and custom conventional builds on the upper end. A JADU inside the existing home runs $80,000 to $150,000. Permit fees, school district impact fees, and any historic-design review or variance fees are separate line items we show you before work starts. The written price you approve on day one is the number on the final invoice. Call (361) 315-4177 for a free estimate specific to your Redlands parcel.
We Also Serve Cities Near Redlands
Fielding ADU Builders handles ADU, JADU, and garage conversion projects across the Inland Empire. Beyond Redlands, we serve Redlands neighbors in Loma Linda, Mentone, Colton, and Highland. If your property sits in one of those cities, the plan check path changes but the pricing discipline doesn’t. Call (361) 315-4177 and tell us the city and the lot, and we’ll tell you what applies.
Serving Redlands, CA - Our Local Coverage Area
We’re based in the Redlands 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 Builders in Redlands
Yes, if your parcel sits inside a mapped historic district, the city will route your ADU through design review before a building permit is issued. That means the elevations, exterior materials, and roof profile have to match the neighborhood’s established character, and it adds time and a design-fee line item to the project. Parcels outside the overlay skip this step entirely. The effect is real enough that we check the parcel’s status before quoting anything.
Yes, an attached garage conversion can often be permitted as a JADU if the space stays within the existing home’s footprint and meets the city’s requirements for a separate entrance, kitchenette, and bathroom. The savings come from skipping detached-site work like trenching, new foundations, and setbacks. The catch is the existing slab and utility depth, which Redlands inspectors check closely on older lots. Call (361) 315-4177 and we’ll tell you early whether your garage qualifies.
A Redlands ADU Plans package must show full architectural drawings, structural calculations, a site plan with setbacks, and a fire-separation section cut where the unit sits close to the existing house. If the parcel is in a historic district, the city also wants elevations that demonstrate design compatibility. A generic state-standard plan set often gets bounced for missing the fire-rated assembly detail, so we draw to what Redlands actually enforces, not what the state minimum says.
Most Redlands ADU projects take five to nine months from signed contract to final inspection. Plan check runs 90 to 180 days, historic-design review adds weeks if it applies, and construction runs three to six months depending on the build method. Prefab kits from Abodu or Dvele can compress the framing phase, but the city’s review timeline doesn’t move for anyone. We stage submissions so the schedule never idles.
Three things in Redlands move the price after work starts: a slab that fails inspection and forces a re-pour, a historic-design condition that requires different materials than originally quoted, and a change you request mid-build. Change orders from the city or from us are priced in writing before we proceed, and they’re show-stoppers only if you approve them. The price you sign at contract is the price at the end unless one of those three things happens, and you’ll see every number before it binds. Call (361) 315-4177 for a free estimate on your Redlands ADU.
If you’re ready to scope your ADU project in Redlands, call (361) 315-4177. Reed Calloway will walk you through what your lot requires and what it costs, in writing, before you commit.
Written by Reed Calloway, Owner at Fielding ADU Builders, serving Redlands since 2006.
