Flagg Builders LLC

home builder, home remodeling contractor, room remodeling

About us

Transforming Homes, Enhancing Lives At Flagg Builders, we specialize in bringing your vision to life with expert craftsmanship and attention to detail. From kitchen and bath renovations to full home remodels, we create spaces that reflect your style and enhance your daily living. Whether you're dreaming of a stunning deck, a welcoming porch, or a spacious room addition, our skilled team ensures seamless design and construction. For those looking to start fresh, we also offer new home construction, guiding you every step of the way to build the home you've always wanted. With a commitment to quality, reliability, and customer satisfaction, we take pride in delivering results that exceed expectations. Let’s build something incredible together! Keith Flagg - Licensed Contractor - CSL & HIC Glenn Shaw

Business highlights

7 years of trusted experience

Amenities

Free Estimates
Yes
Warranties
Yes

Reviews

5.06 Reviews
Number of StarsImage of DistributionNumber of Ratings
5
100%
4
0%
3
0%
2
0%
1
0%


Rating CategoryRating out of 5
Showing 1-6 of 6 reviews

Lou M.
05/2025
5.0
Flagg Builders did a complete finished basement project last summer for us. A living room, game area, gym, and bathroom. Keith is a unicorn in construction. He has the utmost integrity. We had built a custom colonial 4 years ago. Flagg matched all of the custom materials and workmanship. He even went out of his way to use the same custom materials and supplier as our original builder, whom we loved. We also challenged Keith to match the custom first floor stair case in our basement. He relished the challenged and really aced it with very impressive craftsmanship. Leaves the job area immaculate after each, and often long, work days. He is phenomenal to work with not just his talent but his people oriented demeanor. Very personable and friendly. Listens intently. Genuinely cares that his customers are happy. Again this guy is a unicorn. Town inspectors were impressed by his work. One stating ?framing is the best that I?ve seen?. TEN STARS!! Five from me and five from my wife!!
Rating CategoryRating out of 5
$90,000

Leah Z.
05/2025
5.0
Flagg Builders LLC is reliable, professional, and meticulous. I used them for my kitchen remodel along with other parts of my house, and I am beyond happy with the results! Highly recommend.
Rating CategoryRating out of 5

Beth G.
04/2025
5.0
I can?t say enough positive things about Flagg Builders. Their attention to detail is superior. Craftsmanship is excellent. Real pride in their work and the end product. I have several challenging spaces in my home, and Keith worked with me to ensure every detail was considered. The custom built-in for my living room is flawless as well as the board and batten in my dining room. He also took on an accent wall and basement stairwell molding. Keith is personable, a joy to work with, and always responsive. He will do the remainder of my house projects. There are many unreliable contractors and builders out there. I was so happy to find Flagg Builders, who came recommended to me from a gentleman who did work on our fireplace. When I take on a project, I don?t have to worry anymore, I know it will get done and be done right when it?s with Flagg Builders.
Rating CategoryRating out of 5

Ken G.
04/2025
5.0
Flagg Builders remodeled our master bathroom and our kitchen. They are great to work with. We got a full estimate for each project and they stayed within our budget. The work of true craftsmen. They were neat, always left the space clean at the end of each day. When we had trouble deciding on the bathroom tile, Keith helped us select it, which was a huge help and it came out beautiful. The kitchen is gorgeous and they added a deck outside the new slider that connected to and perfectly matched a preexisting deck. I highly recommend them to all my friends and will use them on my next project.
Rating CategoryRating out of 5

Thomas F.
04/2025
5.0
Keith and his crew were extremely professional and highly skilled. They came in under budget at the end of the extensive project and they were always prompt and punctual yet flexible with their scheduling (this was during the pandemic). Our project included two full bathrooms, a kitchen, living room, staircase, and three bedrooms from scratch essentially. All the work has held up beautifully and this is a home with four people and two large german shepherds. I highly recommend Flagg Builders to anyone seeking experienced craftsmanship.
Rating CategoryRating out of 5

ERICA S.
04/2025
5.0
I hired Flagg Builders to renovate a one bedroom rental apartment. Keith was very easy to work with, providing helpful suggestions when needed. All of our questions were addressed quickly. Keith is extremely attentive to detail and completely transformed this apartment into a beautiful living space! We couldn't be happier with our decision to hire Flagg Builders.
Rating CategoryRating out of 5

    Contact information

    1001 Hilldale Ave Unit 6, Haverhill, MA 01835


    Service hours

    Monday:
    8:00 AM - 6:00 PM
    Tuesday:
    8:00 AM - 6:00 PM
    Wednesday:
    8:00 AM - 6:00 PM
    Thursday:
    8:00 AM - 6:00 PM
    Friday:
    8:00 AM - 6:00 PM
    Saturday:
    Closed
    Sunday:
    Closed

    Licensing

    Insured
    State Contractor License Requirements

    All statements concerning insurance, licenses, and bonds are informational only, and are self-reported. Since insurance, licenses and bonds can expire and can be cancelled, homeowners should always check such information for themselves. To find more licensing information for your state, visit our State Contractor License Requirements page.

    *Contact business to see additional licenses.


    Service Categories

    home builder,
    home remodeling contractor,
    room remodeling

    FAQ

    Monday: 8:00 AM - 6:00 PM

    Tuesday: 8:00 AM - 6:00 PM

    Wednesday: 8:00 AM - 6:00 PM

    Thursday: 8:00 AM - 6:00 PM

    Friday: 8:00 AM - 6:00 PM

    Saturday: Closed

    Sunday: Closed

    Yes, Flagg Builders LLC offers free project estimates.
    No, Flagg Builders LLC does not offer eco-friendly accreditations.
    No, Flagg Builders LLC does not offer a senior discount.
    No, Flagg Builders LLC does not offer emergency services.
    Yes, Flagg Builders LLC offers warranties.

    Contact information

    1001 Hilldale Ave Unit 6, Haverhill, MA 01835


    Service hours

    Monday:
    8:00 AM - 6:00 PM
    Tuesday:
    8:00 AM - 6:00 PM
    Wednesday:
    8:00 AM - 6:00 PM
    Thursday:
    8:00 AM - 6:00 PM
    Friday:
    8:00 AM - 6:00 PM
    Saturday:
    Closed
    Sunday:
    Closed