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19 Years In Business

Company Details

  • Verified Licenses


14600 Locustwood Lane
Silver Spring, MD 20905


  • Mon: 8:00 AM - 6:00 PM
  • Tue: 8:00 AM - 6:00 PM
  • Wed: 8:00 AM - 6:00 PM
  • Thu: 8:00 AM - 6:00 PM
  • Fri: 8:00 AM - 6:00 PM
  • Sat: 9:00 AM - 4:00 PM
  • Sun: 9:00 AM - 4:00 PM
View All Details & Credentials


Service Details

  • Residential Work
  • Commercial Work
  • Small Jobs Welcome

Areas of Expertise

  • Asphalt Shingle Roofing - Repair and Roofing
  • Hardscape
  • Mitigation Services
  • Painting, Interior and Exterior
  • Siding Replacement and Repair
View All Offerings and Cities Served

Cost Information

  • Free Estimates
  • Warranty Offered
  • Credit Cards Accepted


98 Verified Reviews
  • 5
  • 4
  • 3
  • 2
  • 1

Highly rated for

  • Quality
  • Value
  • Customer Service
Showing 1-10 of 98 results
5.0 Theresa M. Germantown, MD

IWe couldnâ t have been happier with Gary and his crew. They were professional and very hard working. The pavers that they installed truly transformed the look and function of our home.We are so pleased that we are going to have them come back and do our roof in the Fall! I highly recommend this company.

1.0 Trace A. Silver Spring, MD

This rating is in response to follow-up work regarding a job that was done in Spring 2023 and my interactions with Mr. Gary Ross in response to my follow-up. I was ABSOLUTELY thrilled with the outcome of the work done in March 2023. It beautified my property and backyard. HOWEVER, I started noticing "etching" or peeling of several stones early in the Fall 2023. After the two short-lived snowstorms in January 2024, the problem was exacerbated and pervasive. When I contacted Gary, it took several communications for him to honor his commitment to get back to me and to visit my property. I had to tell him my patience was growing weary and that I expected the same level of customer service he demonstrated when selling the work! I sent pictures of the damage and Gary immediately diagnosed the problem (via text message) as resulting from rock salt being applied to my patio (mind you this is in my backyard and not only did I NOT apply rock salt, I did NOT shovel the backyard!) So, while sub-freezing temperatures and the increased moisture from melting snow were likely contributors to the problem, ROCK SALT was NOT. Gary REFUSED to consider any other cause of the visible damage. I am taking the time to write this review because, Gary Ross was not present when the job was complete. He subcontracted the work. I worked from home at the time and I saw the work his subcontractors did as they finished up my job including cleaning the surface of my stones with some substance. Gary flat out implied without stating directly that I was lying about what I observed and was present for on my own property when my job was completed last Spring. Similarly, Gary implied I was lying about having not applied rock salt and that I was only calling him because I had personally caused the damage - he REFUSED to consider that it could have resulted from any other cause except rock salt. The repairs were begrudgingly done under threat of legal action to enforce the 3-year service and workmanship warranty. The gentlemen who completed the repairs were kind and professional. Mr. Ross has neglected to bother to call to ensure the repair work was completed satisfactorily. I am disappointed in the unprofessional manner this was handled and in the belligerent manner I was treated especially in TEXT messages. Thankfully, I have a RING flood camera in my backyard which records all activities, I took pictures before, during, and after the work was performed and I was able to download pictures prior to the snow storms to prove the deterioration had started to occur beforehand. I spent good money with ABS to do my hardscape job. As stated previously, I was delighted by the outcome in the Spring 2023. Whatever was done by the subcontractors in the workmanship to cause the moisture and temperatures to cause and exacerbate the peeling of the stones (which mind you had shown no prior evidence of peeling in over the 28-years I've owned the property-many of my existing stones were reused for the job as Mr. Ross assured me they could be â I explicitly asked the question before the job was started).

Response from Company:

Unfortunately, in 20 years of professional experience, our owner has never seen this type of defect in that product unless an ice melt product was used. Our installation team with extensive experience agreed with his findings. Furthermore, even if you did not use a saline product, ABS cannot control product defects. Despite his professional opinion on how this matter occurred and to Advanced Building Services chagrin, ABS chose to take the high-road and spent over $3,000 to make your patio new again.

5.0 Cheryl C. Rockville, MD

Very professional, on time, explained everything From the consult to the technicians all were very customer friendly - explained everything they did and checked my entire roof and gutters while they repaired the leak

5.0 Valarie D. Daniels, MD

Our paver walkway is spectacular! From start to finish the experience surpassed our expectations in all areas. The extraordinary skill of the installers and quality of their work was stellar. Gary and Susan provided excellent, friendly customer service as well as efficient communication regarding the timeline of events throughout the project. We will most definitely use them again and highly recommend ABS.

5.0 Thomas K. Rockville, MD

no comment

5.0 Jim C. Gaithersburg, MD

Gary Ross (owner) is a refreshing pleasure to do business with. I have a 35+ year old very large wooden deck on the rear of our home. Needless to say, it was time for a rehab/renovation of the deck surface and rails. Gary came to our home personally, reviewed the existing conditions and completely understood our desire to use the existing structural system and replace the deck boards and hand rail. After we accepted his quote, he proceeded to send excellent carpenters to do the replacement work. His workers were skilled, polite and, outside of the hammering, were invisible. Once the top handrails and deck surface were replaced, they were able to closely match the existing stain and proceeded to stain and seal the entire structure. The final product exceeded our expectations and is an incredible tribute to ABS's work ethic and desire to please. I was an Architect and General Contractor for 42 years, so this was not my first rodeo. I am well aware of the "quick fix" contractors with their "blow and go" approach to projects. Advanced Building Services has earned my unqualified recommendation and will be performing all of our future work.

4.5 Mitchell M. Rockville, MD

The showed on time and they were very professional. The price was very reasonable.

5.0 Sudammi R. Silver Spring, MD

I hired Advanced Building Services to renovate my walkway, two steps, and front porch floor after obtaining many quotes. Their quote was the most reasonable one to remove the existing flagstones and install new pavers. After I received approval from the HOA, the ABS crew began the work the very next day and it was completed efficiently in two days. One neighbor told me that he watched how they built up the ground to lay the pavers and that steps taken were thorough and professional. He told me that they know what they are doing and hence approached ABS himself to obtain a quote for some work he wants done. My walkway, steps and porch renovation results look top notch! I have already received compliments from several neighbors. Gary Ross was courteous and professional in dealing with the contractual matters and his crew were hard working and efficient in completing the work. It was a pleasure to work with this company on my paver installation project. I highly recommend ABS for the services they provide based on my experience with them on my project.

5.0 Cindy R. Damascus, MD

Gary Ross of ABS did an outstanding job of addressing the needs of our unusually shaped roof . His team was neat and clean and very friendly. Our roof looks amazing. We are very pleased. Thank you so much ABS.. I would definitely recommend.

5.0 Giang H. Ashton, MD



Advanced Building Services
Patio & Steps
Pouran Carriage House
Hooshangi Roof
Siding and Roofing
New Roof Completed
Bay Window
Drywall, Paint, Tile
Roof Replacement

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