ADU Construction in Murrieta CA — Build an ADU on Your Property
Accessory dwelling units designed, permitted, and built to California standards.
Repair Hero designs and builds accessory dwelling units (ADUs) across Murrieta and nearby Riverside County — attached, detached, garage-conversion, and junior ADUs (JADUs). An ADU is a self-contained second home on your lot with its own kitchen, bathroom, and entrance, and it's a real build: foundation or slab, framing, full plumbing and electrical, and permits pulled with inspections scheduled where the scope requires them. We're locally owned, documented, and warranty-backed, rated 5.0 on Google across 38 reviews. California has streamlined ADU approvals in recent years, but what actually fits your lot depends on setbacks, utilities, and access — so we walk the property and lay out the options honestly before you commit. Free written estimate, $0 trip charge. Call (951) 285-4023.
When You Need ADU Construction
Most ADU calls start with one of a few needs: a place for aging parents or an adult kid to live close but independently, a long-term rental to offset the mortgage, a home office or guest suite with its own entrance, or simply putting an underused yard or garage footprint to work. Around Murrieta and Temecula, a lot of the 2000s tract homes sit on lots with room at the side or rear for a modest detached unit, and many have an oversized garage that converts cleanly. The right answer depends less on what you've seen online and more on what your specific lot, utilities, and budget will support.
If you only want to convert the existing garage rather than build new, that's usually a garage conversion — a lighter, permit-driven job that reuses the slab and walls you already have. If you'd rather add square footage onto the main house than build a separate unit, a room addition may be the better route. A full ADU sits between and beyond those: its own kitchen, bath, and entrance, and in most cases its own utility connections. We'll help you figure out which of the three actually matches your goal before anyone draws a plan.
Our ADU Construction Process
We start with your goals and a real look at the site, then plan the scope, the permitting path, and the utility connections before any building begins. Utilities are where a lot of ADU budgets get decided: water, sewer, and power all have to reach the new unit, and the panel and main line sometimes need upgrading to carry the added load. We handle the electrical and plumbing tie-ins as part of the build so the trades stay coordinated rather than stitched together after the fact.
From there the job moves through foundation or slab, framing, rough systems, insulation and drywall, then the kitchen, bath, and finishes. Work is built to the permitted plans and inspected at each stage the scope requires — that's the part homeowners most often underestimate, and it's why we'd rather set honest expectations up front than promise a date we can't hold. Because permitting and inspection timelines are set by the city, not by us, we keep you updated as each phase clears rather than quoting a fixed calendar we don't control.
ADU Types Compared
There's no single "best" ADU — the right one depends on your lot, your budget, and what you're solving for. Here's how we usually frame the four common paths. Which fits your property is a conversation, and city rules for your lot are best confirmed on a call or with Murrieta directly.
| ADU type | Best for | Note |
|---|---|---|
| Attached ADU | Adding a unit while keeping utilities close | Shares a wall with the house; often simpler utility runs |
| Detached ADU | Maximum privacy or rental separation | Standalone build; needs its own footprint and access |
| Garage-conversion ADU | Reusing an existing garage footprint | Lighter build on the existing slab and walls |
| Junior ADU (JADU) | A smaller unit within the existing home | Can share a bathroom with the main house; smaller kitchen |
ADU Construction Cost in Murrieta
ADU cost swings widely with the unit type, size, utility work, and finish level — a garage conversion that reuses an existing slab and a new detached build with its own foundation and utility runs sit at very different points, so there's no honest flat number to quote sight unseen. What we can promise is the structure: we assess your property and goals, then put the scope and estimate in writing before anyone commits, so you decide with the full picture in front of you.
The minimum service call is $160, there's no trip charge, and estimates are free. Whether a full kitchen and bath belong in the plan, or a leaner junior-ADU layout does the job, we'll lay out the tradeoffs rather than steer you to the biggest invoice. Call (951) 285-4023 for a written estimate.
Why Choose Us for ADU Construction
Repair Hero is clear about scope, pricing, and the documentation you get with the work. An ADU pulls in framing, utilities, and interior finish all at once, and we keep those trades coordinated under one team rather than leaving you to manage the seams. Because a full unit includes its own kitchen and bath, the interior finish work — cabinetry, counters, tile — is a real part of the job; if you want to see how we approach that side, our kitchen renovation work covers the same craft. We're locally owned in Murrieta and rated 5.0 on Google across 38 reviews, and the work is warranty-backed.
Being local matters on a structural project. We know the Inland Empire heat, the HOA expectations across Murrieta and Temecula neighborhoods, and how the 2000s tract lots around here tend to lay out — which shapes where a detached unit can realistically go. When you're ready, reach out through our contact page or call (951) 285-4023 and we'll set up a time to walk your property.
Common Questions
What is the difference between an attached, detached, and garage-conversion ADU?
An attached ADU shares a wall with the main house. A detached ADU is a standalone building on the same lot. A garage-conversion ADU reuses an existing garage footprint. Each has different foundation, utility, and access needs, so we walk your property before recommending a path.
What is a JADU, and how is it different from a regular ADU?
A junior ADU (JADU) is a smaller unit created within the walls of the existing house, often a converted bedroom, and it can share a bathroom with the main home. It is typically a lighter build than a full ADU. We help you compare a JADU against a full attached or detached unit for your goals.
Do I need permits to build an ADU in Murrieta?
Yes. ADUs are permitted, structural projects, and we pull permits and schedule inspections where the scope requires them. California has streamlined ADU approvals in recent years, but the specifics for your lot — setbacks, size limits, utilities — are best confirmed with the city. Call us and we will point you the right way.
Does an ADU need its own kitchen and bathroom?
A full ADU is a self-contained home, so it includes its own kitchen, bathroom, and entrance. A junior ADU can share a bathroom with the main house and uses a smaller kitchen. We build the plumbing and electrical for whichever unit type fits your property and budget.
How do you price ADU construction in Murrieta?
ADU cost depends on the unit type, size, utilities, finishes, and site conditions — a garage conversion and a new detached build are very different jobs. We provide a free, written estimate before work begins, and there is no trip charge for the estimate visit. Call (951) 285-4023.
Can you convert just my garage instead of building a new ADU?
Often, yes. If you want to reuse the existing garage rather than build new, that is a garage conversion — see our garage conversion page for what that involves. If you want to add square footage onto the main house instead, a room addition may be the better fit.
ADU Construction is part of our General Contracting in Murrieta CA. Visit the page to see all related services Repair Hero offers.
Ready to Get Started?
Don't wait for small problems to become big ones. Call (951) 285-4023 for adu construction in Murrieta CA. Same-day service available. Free estimates, no trip charge.