Commercial roofing you can count on.

ACS is following Covid-19 guidelines issued by the state and county to ensure the safety of our customers and employees. Read more »

Premier Commercial Roofing Solutions
You Can Trust

Since 2002, Allied Construction Services(ACS) has been serving building owners and property managers. ACS works on commercial and industrial buildings as well as multi-tenant apartment complexes throughout the Bay Area and Northern California. 

Call us at (925) 724-2324 to get more information about our commercial roofing solutions.

We provide expert services, top-quality materials, and best-in-niche installations. Need a trusted roofing service for your commercial property? We are here to help!

No project is too big or too small.


A Bay Area Commercial
 Roofing Contractor

Serving Northern California Since 2002

Commercial Roofing Projects Spotlight

Novato Firestone Single Ply
66,00 sq ft
Firestone TPO
Skilled Nursing Facility

Drone shot of roof covered in solar panels TPO single ply membrane at Kohl's roof in Petaluma.65,000 sq ft Acrylic Roof Coating over TPO Kohl’s, Petaluma Retail

50,000 sq ft
TPO & Composition Shingle
Yuba City
Assisted Living Facility

An 80,000 sq ft acrylic roof coating system in El Cerrito. 80,000 sq ft Silicone Roof Coating El Cerrito Shopping Center Retail

Project Video Highlights

C&H Sugar Factory Sign and Brick Building with Two Silos

This was a Tremco AlphaGuard BIO roof restoration for C&H Sugar in Crockett, CA. View video »

This silicone roof restoration was for the City of Walnut Creek’s Tice Valley Gymnasium. View video »

Walnut Creek City Hall Roof with solar panels

This skylight restoration was on City Hall for the City of Walnut Creek. Click to view video »

Premier Commercial Roofing Solutions You Can Trust

Our men installing two medium-sized TPO single ply roofs.

For two decades, we’ve built our reputation as one of the premier commercial roofing companies in Northern California with:

Transparent Quotes

We value your time, so we provide quick, comprehensive, hassle-free quotes, at no charge. Got questions? We’re happy to answer them.

Professional Craftsmanship

We do high-quality work on time and on budget. Our certified team is up to date on the latest and greatest processes, tools, and methods to ensure you receive the best possible installation or repairs. Remember any roofing company can install your roof. What makes us different is the attention we pay to the details!

Friendly Customer Service

Our customers come first. We actively listen to your needs because your satisfaction is the key to our success. We treat you with respect and dignity, maintaining clean job sites, answering questions, and doing our best to exceed your expectations.

Custom Solutions

We love to think outside if your project presents a unique challenge.

The Highest Quality Materials

We only use reputable, high-quality materials, but they are only as good as the people installing them. That’s why we regularly inspect our jobs to make sure no details are left unfinished.

Need a high-quality roofing company you can depend on?
Call us at (925) 724-2324 for more information.


"My company has relied on ACS as a valued resource for roofing and waterproofing for some years now. [...] Timely and comprehensive proposals. Competitive pricing. Workable scheduling. Efficient and courteous workforce. Knowledgeable and experienced sales, management and office staff. Work product of the highest quality. [...] We look no further than ACS for our Roofing and Waterproofing needs. Highly recommend.""
Tom Hastings
Business Owner
Bill D[...] always put the customers first always willing to go beyond the normal to assist us."
Lawrence Stauffer
Building Owner
"The best company we have worked with for our roofing needs. Mousa, who heads their crews, is one of the most professional and competent employee a company could want. When his crews were booked and couldn't get out to us immediately, he personally took care of us. This company has great employees and we will continue to use them for all our construction needs. We highly recommend them."
Business Owner, Trey Jay LLC
"The foreman had the greatest attitude. He went above and beyond."
Christophe Nussbaumer
Operations Manager, City Hope

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