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(650) 977 - 3351

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rated 5/5 based on 50 reviews.

rated 5/5 based on 50+ reviews.

rated 5/5 based on 50 reviews.

WE Build Beautiful ADUs and Homes Across the Bay Area

WE Build Beautiful ADUs Across the Bay Area

WE Build Beautiful ADUs and Homes Across the Bay Area

Licensed Bonded & Insured

Start with $0 Down

50 year Warranty

3-5 day install

Guaranteed Rental Income

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We’ll contact you in 3-5 minutes to schedule a FREE inspection.

Get a FREE Consultaion

We’ll contact you in 3-5 minutes to schedule a FREE inspection.

Get a FREE Consultaion

We’ll contact you in 3-5 minutes to schedule a FREE inspection.

Certified, highly trained installers delivering top-quality service.

Our Reviews

We put our promises before we take our profits.

See why homeowners

trust Hamilton

Eric W

2 months ago

Hamilton Exteriors did an amazing job on my ADU. The team was professional, and the quality of work is outstanding!

Linda Maiden

2 months ago

I can’t say enough good things about Hamilton Exteriors! We wanted to add an ADU to our property, and after talking with a few companies, we chose them — and I’m so glad we did. Their team was professional, communicative, and made the whole process easy from start to finish. Mark explained every step clearly, and the crew worked efficiently to deliver a beautiful space ahead of schedule. It’s such a relief to see our vision come to life. I’ll definitely be calling them for future projects. Highly recommend!

Robert Holt

4 months ago

I’m so glad I found Hamilton Exteriors! I was looking to build an ADU and wanted to make sure I chose a trustworthy company — they exceeded all my expectations.

Laura Gaubin

4 months ago

Hamilton Exteriors built our ADU with incredible attention to detail and a real commitment to quality. The entire process was smooth, and the finished space turned out even better than we imagined.

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Rated 4.8 Stars by Bay Area Homeowners – See Why Customers Love Us!

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Rated 4.5/5.0

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Rated 4.5/5.0

4.8

Rated 4.5/5.0

Rated 4.5/5.0

Construction Services Offered

Attached ADUS

Attached Accessory Dwelling Units (ADUs) are integrated additions to your existing home that expand your living space while enhancing functionality and value. Whether used as a private suite for family, a rental unit for extra income, or a dedicated workspace, attached ADUs seamlessly blend with your home’s design while providing flexibility and long-term property benefits.

Detached ADUS

Detached Accessory Dwelling Units (ADUs) are standalone backyard homes that offer maximum privacy, flexibility, and value. Perfect for guest suites, rental units, or home offices, these independent structures create additional living space while maintaining separation from the main house. A detached ADU enhances your property’s functionality, provides potential rental income, and adds lasting value to your home.

Conversions

Conversion Accessory Dwelling Units (ADUs) transform existing spaces—such as garages, basements, or attics—into fully functional living areas. This type of ADU is a cost-effective way to maximize your home’s potential without expanding its footprint. Whether you’re creating a rental unit, a private suite for family, or a modern home office, conversion ADUs add versatility, comfort, and long-term value to your property.

Plans & Permits

At Hamilton Exteriors, we simplify the planning and permitting process so you can focus on your project, not the paperwork. Our experienced team handles every detail—from design plans and site assessments to submitting permit applications and coordinating with local building departments. We ensure your project meets all code requirements and moves smoothly from concept to construction, saving you time, stress, and costly delays.

The Hamilton
Exteriors Difference

Best Price Guarantee

We promise the most competitive rates in the industry. If you find a lower rate elsewhere, we will gladly beat or match it for you.

Factory Trained Installers

All our contractors are licensed, bonded, insured, and undergo thorough background and business checks.

Industry Leading Warranties

Our roofs are protected by industry-leading warranties, including up to a 50-year shingle warranty and a 35-year labor warranty.

Personal Project Manager

Enjoy a seamless renovation with a dedicated project manager handling all details and communication.

Financing Options Available For Everyone

At Effortless Renovation, we offer flexible financing solutions for every homeowner. Whether you have high or low credit, we have options to fit your needs. Our partnerships with various lenders enable us to provide competitive rates and terms for all credit profiles. Don't let financial concerns delay your roofing project - let us help you find the perfect financing solution.

At Hamilton Exteriors, we offer flexible financing solutions for every homeowner. Whether you have high or low credit, we have options to fit your needs. Our partnerships with various lenders enable us to provide competitive rates and terms for all credit profiles. Don’t let financial concerns delay your roofing project — let us help you find the perfect financing solution.

Let’s discuss your financial options. Quick Response

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Frequently Asked Questions

Didn't find the answer to your question? Call Now (650)-977-3351

How do you ensure transparency and avoid sleazy sales tactics?

How do I request a price match?

What safeguards are in place to prevent overpayment?

How do you handle situations where a competitor offers a lower rate?

How does billing work with you?

How do you ensure transparency and avoid sleazy sales tactics?

How do I request a price match?

What safeguards are in place to prevent overpayment?

How do you handle situations where a competitor offers a lower rate?

How does billing work with you?

How do you ensure transparency and avoid sleazy sales tactics?

How do I request a price match?

What safeguards are in place to prevent overpayment?

How do you handle situations where a competitor offers a lower rate?

How does billing work with you?

(650) 977-3351

support@hamilton-exteriors.com

21634 Redwood Rd Unit F Castro Valley CA 94546

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