ADU Builder and Contractor in Temecula Wine Country
Wine Country parcels along Rancho California Road, De Portola Road, and Calle Contento run multiple acres, which makes them the largest ADU sites in the Temecula area.
They also carry the most complicated permit path, because some sit inside city limits and some fall under Riverside County. Getting that wrong costs months. License B-842038.
Call (951) 551-6165Request a site visit
City or County Decides Everything
This is the first question on a Wine Country project and most contractors skip it.
Two jurisdictions, one road
Parcels along the same stretch of road can fall under different authorities. City parcels permit through Temecula Building and Safety under Municipal Code Chapter 17.23. County parcels permit through Riverside County, under the Temecula Valley Wine Country Community Plan and county zoning.
The rules differ in ways that matter
Setbacks, allowed structures, agricultural zoning overlays, and fee schedules are not the same. A design drawn to city standards can fail county review outright. We confirm your jurisdiction before drawing anything.
Agricultural zoning adds conditions
Parcels zoned for citrus, vineyard, or equestrian use carry conditions on what you build and where. A second dwelling on an agricultural parcel is usually allowed, but the siting rules are stricter than on a residential lot.
Septic and Well Capacity
Most Wine Country parcels run on septic, and many run on a well. Both decide whether your project pencils.
Septic capacity comes before design
Adding a dwelling unit means proving your existing system handles the additional load. That review runs through Riverside County Environmental Health. If the system needs expansion or replacement, that cost exceeds anything you will spend on finishes. We test this first.
Bedroom count is a lever you control
Septic systems are sized by bedroom count. Building a one bedroom unit instead of a two bedroom sometimes keeps you inside existing capacity. That single decision saves more money than any material choice on the project.
Well capacity needs verifying
A second dwelling draws more water. Where your parcel runs on a well rather than Rancho California Water District service, capacity gets confirmed before design.
What You Can Build Here
Detached ADUs and guest houses
Up to 1,200 square feet detached under state ADU law, with four foot side and rear setbacks. On a five acre parcel that unit sits far enough from the main house to function as a genuinely separate residence.
Barn and outbuilding conversions
Many of these properties already carry a barn, shop, or equipment building. Where the foundation and roof are sound, converting one skips the most expensive part of a new build.
Room additions
Lot size is never the constraint here, so room additions are straightforward. The constraint is utility capacity and jurisdiction.
The Cost of Distance
Big parcels carry a specific cost profile that a tract lot quote will not reflect.
Utility trench length
A unit 150 feet from the main house needs 150 feet of trench for water, sewer or septic line, and electrical. On rock or hardpan that trench is a serious line item. We measure the run on the first visit.
Access for equipment and material
A long unpaved drive affects how concrete gets delivered and whether equipment reaches the pad. This is labor cost, and it belongs in the original number.
Panel capacity
Older properties here often run limited service. A full dwelling unit usually requires an upgrade. Known cost, not a surprise, as long as someone checks the panel first.
Remodeling Wine Country Properties
Housing here ranges from 1970s ranch homes to newer custom builds. Older properties usually have original bathrooms with step-over tubs, small vanities, and supply lines past their service life. We take the room to the studs, check the plumbing during demolition, and tell you what needs replacing before we close walls.
Costs in Wine Country
See our full ADU cost breakdown.
These are estimated ranges. They cover construction and standard finishes. They exclude site plan, permit fees, school fees, and engineering consultants, plus any soils report, grading, trenching, retaining walls, HOA fees, or utility connection fees your property requires.
Call For A Real NumberEstimated 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.
Licensing and Credentials
Spencer has worked in construction since 1990 and has built in Temecula since 2004. More than 350 completed projects. Bonded and insured, with certificates provided before work starts.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.
What 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 received several quotes before going with him, and his price was extremely competitive, especially considering the quality of his work. I was concerned about having the bathroom be an unusable mess during the remodel, but Spencer left it spotless each time he finished for the day. He communicated clearly every step of the way and was prompt and thorough.”
It depends on your exact address. Parcels along the same road can differ. We confirm your jurisdiction before any design work starts, because the rules and the fees are not the same.
Usually yes. State ADU law applies broadly, though agricultural zoning adds conditions on siting and use. We check your parcel's zoning and overlays on the first visit.
Sometimes. The county reviews whether your existing system handles the added load. Sizing the unit as a one bedroom rather than a two bedroom sometimes avoids the upgrade entirely.
As far as your setbacks and your budget allow. The limiting factor is trench distance for utilities, not a rule. We measure and price the run honestly.
Get a free Wine Country site visit
We confirm your jurisdiction, check septic and well capacity, and tell you what fits before you spend on design. Call (951) 551-6165.
Request a site visit
Woollard Construction. License B-842038. Serving Temecula Wine Country and all of Temecula.