ADUAugust 10, 2025

Thinking About Building an ADU in Temecula or Murrieta? Start Here

Homeowners planning an ADU layout for a Temecula Valley property

If you’re considering building an ADU in Temecula or Murrieta, you probably have questions. Here’s a simple breakdown of what to consider before getting started.

1. Site EvaluationWalk your property and identify potential ADU spots. A spare bedroom and bath might work for a junior ADU. Converting a garage is a cost-effective option that doesn’t cut into living space. If you have more budget and yard space, a detached ADU offers more privacy and rental potential. We offer free online consultations to help assess your site.

2. Estimate CostsYour budget will guide your decisions.• Hard costs: construction, usually $225–$350 per sq ft. Use $280/sq ft as a safe estimate.• Soft costs: design, permits, engineering.Add these together to set a realistic ballpark budget.

3. Explore Financing OptionsMost homeowners use a HELOC or refinance to fund the project. You can also combine personal savings or help from a family member if it’s being built for them. Talk to your bank to understand your borrowing power.

4. Consider Return on InvestmentBuilding an ADU adds value. If your home is worth $400/sq ft and you build a 500 sq ft ADU at $250/sq ft, you’re adding $200,000 in value for a $125,000 investment. Renting it out? Your tenant may cover the loan with their rent. Run the numbers with your advisor.

5. Start Design PlansWith a budget and site plan in place, it’s time to design. Decide how you’ll use the space, your target size, and whether it’s attached, detached, or garage conversion. Share that with your designer to draft your plans.

6. Get Contractor BidsOnce you have plans, get at least three bids from a qualified ADU builder or a trusted General Contractor in Temecula, CA. Do this before you submit to the city so you can adjust designs if needed.

7. Submit to the CitySubmit your ADU plans to Temecula or Murrieta. The city review process can take up to 60 days. After revisions, you’ll get your building permit and construction can begin.

We’ll cover each of these steps in more depth in future posts.

**Ready to get started?**Schedule your free online ADU consultation today.

👉 https://www.woollardconstruction.com👉 Google Business Profile: https://g.page/r/CXYZ123456

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	[Spencer Woollard](/author/spencer-woollard/)

Spencer Woollard

Spencer Woollard has 30+ years of experience in custom construction in Southern California. With over 350 completed projects including ADUs and bathroom remodels, Spencer is a trusted local contractor in Temecula, CA.

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