How much do addition contractors typically cost?
- Westborough, Massachusetts Average$57,709
- Typical Range$32,500 - $57,709
- Low End - High End$16,000 - $150,000

Bathroom Remodels, New Custom Home Builds, Screen Rooms , and 2 more
"Jack did a fantastic job. Five stars for all his work including quotes, sketches of proposed work, professionalism and workmanship. When I contacted Jack in the summer he set clear expectations when he could provide me with a quote and he was very punctual with it. After inspecting the work that needed to be done, he provided several options and was very patient with the follow up questions. Once we finalized on the option, he worked very fast to get the necessary paperwork. He did all the work himself and with high quality. He even helped me with a contact with another contractor for something unrelated to the job that he was doing. Jack communicates very well, and he always answers e-mails and texts promptly. We highly recommend Jack, and we would gladly hire him for future projects."
75D7B7744DE660A72A8586912C834E395A1FF18B7D39C849E0B06EFB58D69A36 8. in November 2025

Kitchen Remodels, Whole Home Renovations, ADU's , and 7 more
"I had rotting wood around my sliding glass door sill. After coming right out and assessing it, I was given a written quote withing a day. Everything was explained to me by phone. After me deposit, the project was started in little over a week. The workers presented well, were polite, and kept to task. I was kept appraised of their progress with pictures and videos of what they how found( a leaky aur conditioner near the door). All the rotting wood was removed as well as the mold. Everything was cleaned up nicely at the end of the day. The same crew was back at it the next day. The work was exceptional. Again I was kept appraised of their progress. The project was finished and another clean up was done very well."
8DC6D682FA3C1C88F0FD53E000CC94713B63DC95F81EE24DAEB5F96CE680E0C0 E. in August 2026

Tenant turnover and rental property improvements (unit refreshes, make-ready services, repair coordination), Real estate investment and rehab projects (fix-and-flips, investor renovation projects, rental improvements), Property maintenance and repair services (general repairs, turnovers, preventative maintenance) , and 2 more
"Joseph and his team did a very nice job upgrading a bathroom and repairing some water damage. They were diligent and cleaned up every day. I would definitely use them again."
3CD576727E759D144EC497E19ECE0089CD0DB11578AE10A94560920ABAFC1D7D 0. in July 2026
"I needed plans for a two-car garage of a certain size and roof pitch. I could not find stock plans of specifically what I wanted. Richard was very prompt and helpful, produced the plans and arranged for an engineer's stamp."
4EAD13B3B5C9E15BD3F1172F3A0CB83F68D9B7DAB1BD2D5895C7F395BC4C840C 1. in June 2026
"We hired Pedro and his crew to renovate our basement and to say we are thrilled would be an understatement. Pedro and his crew were very professional throughout the whole project, went above and beyond and exceeded are expectations. We now have a basement that we love and the whole family enjoys!"
7011581F1861CF6A1B395A494C4AAC3FCBDD68082148A282DE089A8881D9D37E 4. in March 2026

Decks, Kitchen Remodels, Bathroom Remodels , and 4 more
"Total Contracting had been amazing to work with for our major addition build. From the start they have been incredibly responsive anytime we have questions & so helping with the plans to build a new addition. I have now used them for both personal and business projects & would hire them again! I would recommend them to anyone!"
9F4C9310D6F72A421C298B287419F3FE26021034081E23A738F0B6D38C8325CC D. in March 2026
"Home Options were great. Communicated well, was clear and committed to timeline and budget. Love how my finished basement turned out. Would absolutely work with them again."
EDD1863E558223F7A961FF6CEA9C71DB0F52F37D54B846764A9C22F7D24AC17D D. in July 2026

Residential & Commercial, Addition to Existing Structure - Build, Basement Remodels, Kitchen Remodels, Bathroom Remodels, Garage Remodels , and 2 more
"Excellent service and workmanship! Very accommodating and thorough in all phases. Pleasant and professional!"
958DDCD131BBA696016C35CA113F73A55A4EF15D3C5B4DAB7518154E29409A91 6. in August 2026
"I had an outstanding experience with Real Painting and could not be happier with the results. The painting looks fabulous, and the service was of the highest quality. I received quotes from four painters, and Carlos compared very favorably in both price and expertise. Carlos accommodated every request I had to make adjustments to my project and made himself available whenever I tried to reach him. He was extremely knowledgeable about which paints would work best for walls, cabinets, ceilings, and the moisture levels in each room, as well as ways he might work with me to maximize efficiency while reducing costs. His team was highly professional, courteous, and skilled. They carefully wrapped and taped my furniture and home items in every room, always removed their shoes when in carpeted areas, and took great care to protect my home throughout the process. Carlos was referred to me by my realtor, who has had him paint her properties twice. After seeing the excellent work he and his t"
36278EC84F36C34231325C3714E6AD6CAD9C49022757FAE96FAC414231036BCB 3. in April 2026
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Westborough Addition & Remodeling Contractors are rated 4.8 out of 5 based on 118 reviews of 118 pros.
The HomeAdvisor Community Rating is an overall rating based on verified reviews and feedback from our community of homeowners that have been connected with service professionals. See individual business pages for full, detailed reviews.
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