Your Perfect Addition

Transform Your Home with an ADU

Enhance your property with our expertly crafted ADUs and detached structures tailored to meet your needs.

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Our Services

Comprehensive Solutions for Quality Builds

Explore our range of expert services from design to construction, ensuring a seamless building experience.

Accessory Dwelling Units

Custom-designed ADUs to enhance your property’s functionality.

General Contracting

Comprehensive general contracting services for your project.

Detached Structures

Tailored solutions for various detached structures.

Renovations and Additions

Transform your existing space with renovations and additions.

Years of Experience

Team Members

Satisfied Customer

Project Completed

Our Story

Building Dreams for Over 30 Years

With a passion for construction and a commitment to quality, our journey began with a vision to enhance homes throughout Rhode Island.

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Why Choose Us

Exceptional Quality, Every Time

Expert Craftsmanship

Our skilled team handles most work in-house, ensuring quality control and attention to detail in every project.

Trusted Partnerships

We collaborate with long-term subcontractors, guaranteeing reliable service and exceptional results for specialized tasks.

Tailored Solutions

Every project is customized to meet your unique vision and requirements, whether for a rental unit, guesthouse, or workshop.

Customer Satisfaction

We prioritize your satisfaction, maintaining open communication and support throughout the entire building process.

Client Reviews

What Our Clients Say About Us

4.8

Google Ratings

★★★★★

5-Star Ratings from More Than 2,000 Happy Users

Keystone Builders transformed my backyard into a perfect guesthouse. Their professionalism and attention to detail made the entire process a joy.

Emily JohnsonCompany Name

The team at Keystone Builders delivered an outstanding workshop for me. Exceptional quality and timeline. Highly recommend to anyone considering a build!

Michael SmithCompany Name

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Turn Your Dreams Into Reality Today!

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