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Top-Rated Addition to existing structure builders in Fairfax - Updated Nov 2026

Avatar for JNG Building Services
JNG Building Services
4.7(
7
)
Addition to Existing Structure - Build

Serving Fairfax, VT and surrounding areas

Approved

Super Service Award Winner

In business since 2016

Warranties offered

Credit card accepted

"Very pleased with JNG! Neil and his crew were excellent. Replaced by fromt porch for less than half what I was quoted from another local builder. Worl is top-notch! I also had some work done on my garage doors, had a new sliding door to the deck installed, and roof, flashing and fascia repaired. All was done quickly and I couldn't be happier with the results. I will definitelyuse JNG again this year, have another list of projects for them to do!"
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+37

Response time2 days
Response rate100%
4 neighbors recently requested a quote
N. B. Construction
4.2(
9
)
Addition to Existing Structure - Build

Serving Fairfax, VT and surrounding areas

Approved

In business since 2005

Free estimates

Customers say: Terrific value

"Nick was extremely busy but took time to come introduce himself and look at the job. He replaced some rotting boards on the house and around our woodstove pipe. He did excellent work and came when he said he would be there. I will recommend him to anyone else who is looking for a builder."
repairing rotten plywood
roof completed
smith job
smith remodel
smith remodel

+56

Response time2 days
Recommended by100%of homeowners
Avatar for Kennison Construction LLC
Kennison Construction LLC
4.3(
23
)
Addition to Existing Structure - Build

Serving Fairfax, VT and surrounding areas

Approved

In business since 2022

Free estimates

Credit card accepted

"Kennison Construction was efficient and very responsive to my requests. They actually completed the installation of 5 windows sooner than expected. The finished project looks great! Cost is in line with industry standards. I highly recommend!"
Bathroom remodel
10 neighbors recently requested a quote
Recommended by47%of homeowners
Avatar for SEJAY CONSTRUCTION LLC
SEJAY CONSTRUCTION LLC
4.8(
24
)
Addition to Existing Structure - Build

Serving Fairfax, VT and surrounding areas

Free estimates

"Rick and his Father in Law were professional, honest and on time. His review of the scope of work and building knowledge was top notch and I would recommend him to come in on budget with no surprises!"
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+374

Recommended by100%of homeowners
Blanchard Design Build
5.0(
12
)
Addition to Existing Structure - Build

Serving Fairfax, VT and surrounding areas

Warranties offered

"Jason removed existing countertop and leveled the cabinets. When new countertops were installed the next day the installers noted the quality and professional job done on leveling the cabinets. Jason returned to mount support brackets and reinstall molding. Jason did a great job, was on time and easy to get ahold of. Would definitely use him again."
Remodeling - General Project
Custom Benches Raised Panel Drawers
Remodeling - General Project
Remodeling - General Project
Perchy Perch

+43

Response time5 days
Recommended by90%of homeowners
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FAQs for addition to existing structure building service projects in Fairfax, VT

You can typically raise your roof by four to eight feet, depending on your home's structure and roof design. The exact amount depends on factors like roof slope and framing support. Raising the roof creates additional interior space, enhances natural light, and increases your home's value. Consult a professional to determine the feasible height increase for your home.

Yes, you need a building permit to raise your roof. Obtaining a building permit ensures your project complies with local building codes and safety regulations. A professional contractor can assist with the permit and inspection process and ensure all legal and safety requirements are met. Your contractor will be familiar with building codes in your area, which can differ between cities or states.

While it's possible to raise a flat roof, it requires extensive structural modifications. Flat roofs lack the attic space and support structures of pitched roofs, so raising them involves significant engineering to ensure safety and durability. This process can be complex and costly, so professional assessment is essential before undertaking a project of this magnitude.

The Fairfax, VT homeowners’ guide to addition to existing structure building services

From average costs to expert advice, get all the answers you need to get your job done.