ADU Builder and Bathroom Remodeler in Temecula, CA
Woollard Construction builds ADUs and remodels bathrooms across Temecula and the surrounding valley. You get a free consultation, a written scope with real numbers, and one point of contact from the first site visit through final inspection.
Request a site visit
“Temecula Valley’s ADU & Bathroom Remodeling Specialist. From design to final inspection — built right the first time.”
35 years in construction. 22 years building in Temecula.
More than 350 finished projects. Most contractors quoting your job have less than ten years behind them. Three things separate our work from a name you pull off a directory site.
You deal with the same person the whole way through
Spencer walks your property before any number gets written down. He measures setbacks, checks where your panel sits, looks at your slope and your drainage, and tells you what fits. No salesperson hands you to a project manager you have never met.
The number in the proposal is the number
We break out site work, permits, materials, and labor as separate lines. You see where every dollar goes. Change orders happen on construction projects, but they happen because you changed your mind, not because we skipped a site condition to win the bid.
We know the local approval process
Temecula, Murrieta, Menifee, Wildomar, and Lake Elsinore each run a different permit process, and some outlying parcels are reviewed by Riverside County rather than a city. We have submitted in all of these jurisdictions and we handle every plan check correction ourselves.
What We Build in Temecula
From standalone ADUs to bathroom remodels and room additions, we handle the full design, permit, and construction process across Southwest Riverside County.
Detached ADU
A standalone unit with its own entrance, utilities, and privacy. Up to 1,200 square feet.
View service
Attached ADU
Shares one wall with your existing home. Lower cost than detached and great for tight lots.
View service
Garage Conversion
Convert your existing garage into a legal ADU faster and for less than new construction.
View service
Junior ADU
Up to 500 square feet carved from your existing house with its own entrance and kitchenette.
View serviceAdditions
All additions services
Bathroom Remodeling
All bathroom remodeling services
Bathroom Remodels
Full remodels taken to the studs. We fix rot, upgrade waterproofing, and install your chosen tile and fixtures.
View service
Tub-to-Shower
Remove a step-over tub and build a curbless, slip-resistant walk-in shower with blocking for grab bars.
View service
Accessible Bathrooms
Wider doorways, roll-in showers, grab bars, and comfort-height fixtures so you can age in place safely.
View serviceWhat Temecula Valley homeowners say
More than 350 completed projects in Southern California and the Temecula Valley, and a five star rating across Google, Yelp and Houzz.
“As a plumbing contractor I've worked with a lot of builders over the past 25 years and the truly exceptional ones are few and far between. Woollard Construction is one of the best. We routinely go back to homes they've either remodeled or performed additions to years later for general plumbing maintenance or repairs and the homeowners still speak glowingly of their experience with Woollard construction even decades later. There is only ONE home builder I regularly recommend and that is Woollard Construction.”
“Everything about our experience with Woollard Construction was amazing!! Spencer was fantastic!! He was punctual, professional and great at communicating where we were in every step of the process. Our ADU is beautiful and we are so happy with how everything turned out.”
“We have done several projects with Spencer Woollard through the years including a major two-story addition on our Temecula home. He is a highly-skilled contractor and great to work with. He keeps a clean job site, communicates regularly, and has immaculate workmanship. Spencer is the best in town.”
Pulled live from Google, Yelp, Houzz and Facebook. We do not curate this feed.
Temecula ADU Rules in 2026
California law overrides most local restrictions on ADUs. Here is what applies to a single family lot in Temecula.
Up to 1,200 square feet for a detached ADU. Up to 500 square feet for a JADU.
Four feet from the side and rear property lines for a detached unit.
16 feet for a standard detached ADU. Up to 18 or 20 feet in some cases, including units above a garage.
No additional parking required within half a mile of transit. Cities cannot require replacement parking for a garage conversion.
Not required for standard ADUs permitted after January 1, 2020. Still required for JADUs.
The city must issue a decision on a complete application within 60 days.
Temecula administers these under Municipal Code Chapter 17.23 through the Building and Safety Division. The city publishes its own guidance on the City of Temecula ADU page. HOA rules cannot prohibit an ADU, though design and material standards still apply. Read our full breakdown of Temecula ADU rules, permits and requirements.
Six stages, start to finish.
Free site visit
We measure your lot, confirm setbacks, locate your panel and sewer line, check slope and drainage, and tell you what fits.
Design
We draw plans or select from a city pre-approved set where one exists. You approve layout and finishes before anything gets submitted.
Permits
We submit to the correct jurisdiction and handle every plan check correction. You do not sit in line at a counter.
Site work
Grading, foundation, utility trenching, and any septic or panel upgrades.
Construction
Framing, rough plumbing and electrical, inspections, insulation, drywall, and finish work. You get weekly progress updates.
Final inspection and walkthrough
We do not close out until the jurisdiction signs off and you sign off.
What ADUs and Bathroom Remodels Cost in Temecula
Five factors move an ADU price: unit size, distance from the main house for utility runs, site slope and grading, whether your electrical panel needs an upgrade, and finish level. For bathrooms, the drivers are whether plumbing gets relocated, the condition of what we find behind the walls, and tile selection.
Ranges below cover construction and standard finishes. They exclude the site plan, city permit fees, school fees, and engineering consultants. We give you the numbers on the first visit and a fixed written scope before you sign.
- Detached ADU, 499 sq ft one bedroomEstimated Cost$225,000
- Detached ADU, 749 sq ft two bedroomEstimated Cost$290,000
- Attached ADU, 500 sq ftEstimated Cost$230,000
- Garage conversion ADU, two carEstimated Cost$165,000
- Junior ADU, up to 500 sq ftEstimated Cost$105,000
- Room addition, 500 sq ftEstimated Cost$175,000
- Primary bathroomEstimated Cost$35,000
- Hallway bathroomEstimated Cost$20,000
- Walk-in shower conversionEstimated Cost$10,000
Estimated costs. Every property is different, so your final price depends on your lot, design, and finish selections. We give you a firm number after a free site visit.
Southwest Riverside County and North San Diego County
Inside Temecula we work in Santiago Estates, Morgan Hill, Meadowview, and the Wine Country area of 92592. In Murrieta we build in Butterfield and Bear Creek in 92562.
If your address sits between two of these, call and ask. We cover Southwest Riverside County.
Licensing and Credentials
California general contractor license
B-842038, active and in good standing.
Experience
Spencer has worked in construction since 1990 and has built in the Temecula Valley since 2004. More than 350 completed projects.
Bonded and insured
General liability and workers compensation certificates provided before work starts.
Licensed subcontractors only
Every subcontractor on your job is licensed and insured.
Verify any California contractor license, including ours, through the Contractors State License Board. Check it before you hire anyone.
Cost depends on size, type, and site conditions. A garage conversion sits at the low end because the structure already exists. A detached unit with new utilities and grading sits at the high end. We give you a range on the first visit and a fixed scope before you commit.
Design and permitting run two to four months. Construction runs four to seven months depending on size and site work. Garage conversions move faster on both ends.
No, not for a standard ADU. California removed the owner occupancy requirement for standard ADUs permitted after January 1, 2020. JADUs still require you to live in the main house or the JADU.
No. State law prevents an HOA from prohibiting an ADU on a single family lot. Your HOA still enforces architectural standards on exterior materials and colors, so we design to pass review.
We are based in the Temecula Valley and build across Southwest Riverside County. Call (951) 551-6165 and we will schedule a free site visit at your address.
Yes. We submit the application, respond to every plan check correction, and schedule inspections. You do not deal with the counter.
Price turns on whether plumbing moves, what we find behind the walls, and your tile and fixture selections. We quote a fixed scope after the walkthrough.
Get a free consultation.
We will walk your property, tell you what fits, and give you a real number. Call (951) 551-6165 or request a site visit online.