Get matched with top addition to existing structure builders in Willimantic, CT

"Excellent. We added a bathroom and a bedroom, took down paneling and completely redid the family room. These guys did all the electrical work, plumbing work, flooring, painting and everything else. Amazing communication, stayed on budget, worked very well with us and the work was done quickly and exactly as described. Any issues were immediately dealt with. Any questions were immediately answered. Would absolutely work with these guys again and would recommend them!"

"Timber and Meghan were great to work with. The price for the work was extremely reasonable and Timber was very flexible and creative with solutions. The original plan was to power wash and treat the existing fence and pergola. Timber suggested going over the old fence with a new fence and building a new pergola.The overall cost for these changes was pretty much the materials. We provided Timber with a photo of a pergola that we found on line and he recreated it flawlessly. I cannot praise Timber highly enough. We are thrilled with the new deck. One of our friends is a retired home builder who is never impressed. He had nothing but praise for the quality and craftsmanship of the work. We already have plans to engage Timber for additional projects. PS We had to order a new dishwasher while Timber was here. He installed it for us and took the old one away."

"Abdul Perry and crew did a fantastic job. Diligent workers, meticulous work. Cleaned up at the end of every day. The price was fair. They even took care of the rot around some windows and walls. No hidden fees, no unnecessary work done. We will definitely be hiring them for future projects."

"Excellent price, excellent work, got the job done in a timely manner. We would definitely hire them again."

"Knowledgeable, fast service, all around great job from start to finish. Completed in a timely manner. Great communication."

"I recently had my shingle roof replaced and I?m very happy with the results. The team was professional, punctual, and completed the job efficiently. The quality of the work is excellent, and the new roof looks great. They kept the work area clean and communicated well throughout the process. I would definitely recommend them to anyone needing a roof replacement."

MARK1 CONSTRUCTION is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

With over 20 years of hands-on construction experience, Four Sons Home Improvement brings leadership, precision, and integrity to every project. Our background includes serving as a Commercial Carpentry Lead and Foreman, as well as a Residential Project Manager, giving us a unique blend of large-scale expertise and detailed home renovation knowledge.\n\nWe specialize in meticulous, high-quality craftsmanship, backed by industry qualifications including OSHA 30 & OSHA 10 certifications and HIC #0703971.\n\nWhat truly sets us apart is our commitment to communication, quality, cleanliness, and transparency—values we bring to every home we enter. We proudly service Hartford and Tolland Counties, delivering dependable improvements that families can trust.\n\nAt the heart of our work is family. Four Sons Home Improvement is driven by the desire to show our children what hard work, faith, and dedication can achieve—building not only better homes, but a lasting example for the next generation.

"Entire process exceeded my expectations from the initial contact I had with Alliance to the completion of the project. The proposal I received from Keith provided the level of detail I was looking for and he did a great job in going over the siding products Alliance offered to detailing all the necessary steps in the process. The installation process went very smoothly and was completed in a timely manner. The crew led by Serg were extremely professional, knowledgeable and focused. I could not be happier with the work they did and Serg kept me updated on how the project was progressing and was quick to reach out to me with any questions he had on the proposed installation approach. Therefore, I would recommend Alliance for any home improvement needs that you may need addressed. Lastly, I was so satisfied with the siding installation Alliance did I am now having them replace the two entry doors to my garage. Thank you again Sergiy, Keith, Serg and the rest of the installation crew. CFP Sr."

"Karol was excellent in every aspect of the job. Karol was wonderful to work with! Honest, timely and excellent outcomes. Price was reasonable and fair, workers were very pleasant, always punctual, clean-up after each days work was exceptional and completed projects were exactly as I wanted and accommodated last minute change requests. He was responsive and took care of all of the permits and dealt with the building department in my town to assure the basement is up to code. Karol is excellent - the sort of professional that you want to call time and again. I will call him for any future work and tell all my friends.Thank you!"