Specialty Design Build ADU projectLicense Verified

Specialty Design Build

Serving Escondido, San Diego County · Based in Escondido, CA

Pricing on request — unlock Specialty Design Build's ADU pricing for your project

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Project gallery

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Specialty Design Build ADU project 3
Specialty Design Build ADU project 4
Specialty Design Build ADU project 5

About Specialty Design Build

Specialty Design Build is a CSLB-verified contractor listed in San Diego County with classification B | C33 | C54.

24+ years building ADUs · CSLB 799853 · B | C33 | C54 - General Building Contractor

Specialty Design Build ADU pricing

Pricing varies by unit type, size, finishes, and site conditions. Unlock Specialty Design Build's project pricing for your lot — free, no obligation.

Unit typeTypical sizePricing
Studio / JADU≤ 500 sq ftPricing locked — unlock to view
1-bedroom detached ADU600–750 sq ftPricing locked — unlock to view
2-bedroom detached ADU750–1,000 sq ftPricing locked — unlock to view
Garage conversion400–600 sq ftPricing locked — unlock to view
Attached ADU400–800 sq ftPricing locked — unlock to view

Pricing is unlocked per project

Share a few details and we'll send Specialty Design Build's pricing for your build.

Services Specialty Design Build offers

  • Detached ADUs
  • Attached ADUs
  • Garage Conversions
  • Junior ADUs (JADU)
  • Permitting

What Specialty Design Build handles

Design & permitting

In-house design and full permit handling.

  • Architectural design & 3D renderings
  • Structural & Title 24 energy plans
  • City plan-check submittal & corrections

Construction

Turnkey ground-up and conversion builds.

  • Foundation & framing
  • Detached, attached & garage-conversion ADUs
  • Electrical, plumbing & HVAC

Financing

Guidance and lender introductions.

  • Renovation / construction-loan guidance
  • HELOC & cash-out refinance referrals
  • ADU-specific (after-build-value) lenders

Project types

ADU formats this builder takes on.

  • Detached ADU
  • Attached ADU
  • Garage / ADU conversion

Warranty & support

What's covered after move-in.

  • Workmanship warranty
  • Manufacturer materials warranties
  • Dedicated project manager

Reviews of Specialty Design Build

5.017 reviews
Verified

Really good quality professional team! Since we started renovation, the team comes everyday at 7 am to start work. I had referral from another trusted contractor. Cost will seem high in the beginning because they let you know upfront and no surprised later. . But after some research I realized cost is very reasonable. Good communication and very patient with my very many questions.

Alice Xu0 found this helpful
Verified

Sheen has done work for us in the past so when we had a flood in the house we did not hesitate to contact Sheen to help with this whole house remodel. Sheen and workers, especially Francisco, did an outstanding job in getting our home completed, from new cabinets, flooring, drywall, new kitchen and painting throughout they made our house brand new! So appreciative in getting this completed so quickly, once insurance paid up!

Terri Hughes0 found this helpful
Verified

Sheen and his team are friendly, hard-working, and knowledgeable professionals. They completed an ADU Garage Conversion so that my elderly mother could live with us and yet have her own space. And the project turned out wonderfully! Unlike some contractors I've worked with in the past, they are very responsive in terms of communication and patiently answer all your questions. Outside unforeseen reasonable changes, they kept to their estimate. When an issue surfaced a few months later with our mini-split, they were quick to diagnose the problem and correct it. I always felt that their interest in my family's welfare was genuine, and appreciated their support throughout the entire process. I would recommend them.

James Lee0 found this helpful
Verified

We used Sheen and Specialty Home Improvement and I would definitely recommend him and his team on your home improvement project. They were timely and got our project completed within budget. Came out excellent!

Will Parrish0 found this helpful
Verified

A year into COVID, it was difficult to find any available worthwhile contractors. Either everyone was price gouging or the price sounded too good to be true. After a few long conversations with Sheen, I felt comfortable to move forward with Home Specialty building my ADU. At my request, I was pretty involved from day one. As a new homeowner I wanted to get a glimpse of how things are suppose to be done. Sheen kicked me over a website with the schedule and contract all on display for me to follow. I would youtube every bit of the process and learn it myself and then watch it be done. Nearly everything was spot on and professional. Sheen answered all my questions promptly in person/or called as they came up. He was always honest, which is not what I always wanted to hear, but which goes a long way these days. By the end of the project, I was happy I ultimately went with Sheen.

B W0 found this helpful

Frequently asked questions about Specialty Design Build

What does Specialty Design Build offer?

Specialty Design Build is a full-service ADU builder serving Escondido, CA, handling design, permitting, and turnkey construction for detached ADUs, attached ADUs, garage conversions, and junior ADUs (JADUs). Specialty Design Build holds a 5.0-star rating across 17 verified homeowner reviews.

Is Specialty Design Build licensed and insured?

Yes. Specialty Design Build holds an active CSLB license (799853), classified B | C33 | C54 - General Building Contractor, and is bonded and insured.

How much does Specialty Design Build charge to build an ADU?

Specialty Design Build prices every ADU per project — your cost depends on size, finishes, and site conditions. Garage conversions are the most affordable path; detached units cost more. Pricing is unlocked per project: request a quote to get Specialty Design Build's exact, no-obligation estimate for your lot.

What areas does Specialty Design Build serve?

Specialty Design Build builds ADUs in Escondido, San Diego County.

How long does Specialty Design Build take to build an ADU?

Most ADU projects run 6–12 months end to end — roughly 1–2 months for design and permitting (California caps plan check at 60 days for compliant units) and 4–8 months of construction. Specialty Design Build confirms a timeline for your specific project during the feasibility consultation.

How do I get a quote from Specialty Design Build?

Tap any "Get a Quote" button on this page to share a few details about your property and project. We'll confirm your service area, match you directly with Specialty Design Build, and set up your free feasibility consultation — no obligation.

Where Specialty Design Build works

Escondido, CAService-area map
Street View
  • City Building & Safety
  • Planning Department
  • Permit Center

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