Flat Roofing (for Homes, ADUs, Garages) – San Diego County

Proudly serving Greater San Diego, North County, Coastal, Inland Valleys & Southwest Riverside

Inspections Within 24-48 Hours

Licensed and Insured Since 1988

Lifetime Manufacturer Warranties

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Hours:

Residential Roof

Replacement

Water

Roof Repairs &

Leak Detection

Emergency Roof Services

Flat Roofing for ADUs, Garages and Home Additions

Looking to replace or upgrade a flat roof in San Diego? Whether it's an ADU, garage, or home addition, TAG Roofing & Solar delivers clean, code-compliant installations designed for modern living.


Our flat roofing options are solar- and HVAC-friendly, with seamless, low-scope systems that minimize complexity and maximize durability. We also offer modified bitumen for home additions. Most projects are completed in just 1–3 days.

 

Why Choose TAG for Your Flat Roof?

  • 35+ Years of Licensed Experience — CSLB #557970 (B), #1138765 (C-39 Roofing)
  • Fully Insured & Permitted Projects
  • Flat Roofing Specialists — TPO, Modified Bitumen, Seamless Systems
  • Solar & HVAC-Compatible Designs
  • Clean, Efficient Work Crews
  • HOA-Compliant Materials & Methods
  • 10-Year Workmanship Warranty + Lifetime Manufacturer Warranties


What to Expect

  • On-Site Consultation and Roof Inspection: We assess your roof structure, ventilation, and layout to recommend the best flat roofing system for your needs and budget.
  • Written Quote Within 24 Hours: Transparent pricing includes labor, materials, permits, and optional upgrades.
  • Permitting and Scheduling: We handle city permits, inspections, and HOA approvals (if applicable).
  • Tear-Off & Deck Prep: Old roofing is removed, decking inspected, and damaged wood replaced.
  • Underlayment and Flashing Installation: Synthetic or radiant barrier underlayment installed with all required flashing and vents.
  • Flat Roof Installation: TPO or modified bitumen installed to manufacturer specs with full quality control.
  • Cleanup and Final Walkthrough: Complete site cleanup, magnetic nail sweep, and walkthrough with maintenance tips and warranty info.
  • 30-Day Follow-Up: We check in to ensure your roof performs as promised.

 

Timeframe & Cost Overview

  • Install Time: 1–3 days (typical residential flat roof)
  • Cost Range: $8,000–$25,000+ (Varies by roof size, layout, tear-off complexity, and materials)


Pricing Disclaimer: Estimates vary by project scope. You’ll receive a written proposal after inspection.


Financing Options

We offer flexible options to fit your timeline and budget:

  • 0% interest for 12–18 months (on approved credit)
  • Low monthly payment programs with extended terms
  • Home equity–backed financing (HELOC/refi)
  • Roofing-specific financing designed for homeowners


All financing is subject to credit approval and availability. We'll walk you through options during your estimate  — no pressure, no surprises.


Services List

  • Flat Roofing Systems — TPO, Modified Bitumen, Seamless Options
  • Solar-Ready & HVAC-Compatible Designs
  • Roofing for ADUs, Garages, and Home Additions
  • HOA-Compliant Installations
  • Full Permit and Inspection Handling


We're now installing roofs across San Diego, Temecula, Oceanside, Vista, Carlsbad, El Cajon, and surrounding areas.

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Get a New Flat Roof for Your Home or Garage

Contact us today for more information.

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Refer a Friend Special

Refer a friend to TAG Roofing & Solar for residential or commercial roofing and receive a $100 gift card. Contact us today to learn more.

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Key FAQs

  • Can I replace my roof without removing old shingles?

    As both a residential and commercial roofer in San Diego, CA, TAG Roofing & Solar provides residential and commercial roofing services.

  • How do I choose between shingle, tile, or metal?

    We’ll help you select based on lifespan, aesthetic, cost, and structural requirements.

  • Will insurance help cover my roof?

    In some cases—especially storm or wind damage—your carrier may contribute. 

  • Do you offer solar-ready roofs?

    Yes, all roof installs can be solar-integrated or future-ready. 

Call Us Today

Ready to upgrade your flat roof? Contact TAG Roofing & Solar today for a fast, professional estimate — and get your project started in as little as 1–3 days.

Our home is 32 years old and needed a new roof. Karl was great and easy to work with through the estimation/quote process. The office was easy to work with for payments and scheduling. Anthony and his team were fun to work with while delivering on everything they said they'd do. Anthony kept the project running on schedule, worked around rainy days, and was a great resource for us to ensure our home was safe. The new roof looks excellent, new wood work around the roof turned out great, overall very happy.

Matthew K.