ADU Construction in Phelan, CA | Pro Serv Builders

Phelan’s rural atmosphere and large parcel sizes make it a natural fit for detached ADU construction. Pro Serv Builders builds Phelan ADUs that handle the desert environment — properly insulated, weathertight, and built for county approval.

ADU Services in Phelan

  • Detached ADU design and build — standalone backyard unit from foundation to final finish
  • Garage conversion to ADU or JADU — most cost-effective path when you have an existing structure
  • Attached ADU additions — connected to main home, separate entrance
  • Permit application and plan coordination — we handle all paperwork with the city or county
  • Foundation, framing, and structural work — engineered and built to code
  • Plumbing, electrical, and HVAC rough-in — all licensed, all permitted
  • Full interior finish — kitchen, bathroom, flooring, paint, trim
  • Separate entrance and utility coordination — designed for real tenant use

Why Phelan Is a Strong ADU Market

We work with San Bernardino County’s unincorporated area requirements for Phelan — navigating the process so you’re not stuck waiting months for approvals. Our rural parcel experience means fewer surprises and a smoother build.

ADU Cost Guide for Phelan

  • Garage conversion (JADU): $40,000–$80,000
  • Attached ADU addition: $90,000–$160,000
  • Detached ADU (new build): $120,000–$250,000+

Cost varies significantly based on size, finish level, and site conditions. A free consultation gives you an accurate number for your specific property.

Frequently Asked Questions

How long does it take to build an ADU in Phelan?

Permitting typically takes 6–12 weeks depending on the jurisdiction. Construction runs 3–6 months after permit approval depending on ADU type and size. Garage conversions are on the faster end; new detached builds take longer.

Can I rent out my ADU immediately after completion?

Yes — once the final inspection is passed and a certificate of occupancy is issued, you can legally rent the ADU. We make sure you have everything needed for occupancy sign-off before we close the project.

Do I need to live on the property to build an ADU in California?

California law no longer requires owner-occupancy for most ADU types as of recent legislative changes. Check with your local jurisdiction for any remaining local requirements — we’ll advise you during your consultation.

More Services in Phelan

Pro Serv Builders handles all of the following in Phelan — one contractor, every trade:

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Free ADU Consultation in Phelan

Let’s talk about your property, your goals, and what’s possible. Pro Serv Builders offers free ADU consultations for Phelan homeowners.

📞 (855) 845-7378  |  ✉️ proservbuilders@gmail.com

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