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

Avatar for Urban, LLC.
Urban, LLC.
4.5(
92
)
Addition to Existing Structure - Build

Serving Nampa, ID and surrounding areas

Approved

In business since 2019

Free estimates

Warranties offered

"Easy to work with, Nick is a great contractor and has great subcontractors who are very pleasant to have them around and they did great work. Pay attention to the detail and work hard to get it right."
Royal Plaza (Boise, ID)
Denver St.
Banbury Modern
Royal Plaza
Denver St.

+130

Response time5 hrs
Response rate100%
1 neighbors recently requested a quote
Avatar for North Ninety Custom Homes
North Ninety Custom Homes
4.9(
23
)
Addition to Existing Structure - Build

Serving Nampa, ID and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Warranties offered

"I had Payton build me a new deck in the backyard and I couldnâ t be more happy about the results. This is where Iâ ll be spending all my free time at now since I canâ t stop staring at it. Thank you for all the hard work Pine Top!"
Feature wall
Master Bedroom
Kitchen
Common Area
Master Bathroom

+67

Response time1 day
Response rate90%
32 neighbors recently requested a quote
Thiffault Construction
4.6(
17
)
Addition to Existing Structure - Build

Serving Nampa, ID and surrounding areas

Approved

In business since 2018

Free estimates

Credit card accepted

"James did a great job for us building a wall. From start to finish he was here when he said he would be and finished on time even with a few speed bumps in the middle. Non of his own doing I might say. Thank you James you are on the top of my list for the next project. Trent"
Response time2 days
1 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for O'Connor Building & Design, LLC
O'Connor Building & Design, LLC
4.1(
85
)
Addition to Existing Structure - Build

Serving Nampa, ID and surrounding areas

Approved

In business since 1991

Free estimates

Warranties offered

"OConnor Building and Design was professional in both their bidding and construction processes. They built the fence within budget and in the specified time frame. The team who built it were really great to work with and we would recommend OConnor Building and Design to any of our friends and neighbors that are looking for a quality fence construction company."
Main House
Guest House
Guest House Before
Guest House After
RSF Kitchen Remodel

+19

Response time1 day
Response rate92%
9 neighbors recently requested a quote
Avatar for Custom Renovations Contracting LLC
Custom Renovations Contracting LLC
5.0(
8
)
Addition to Existing Structure - Build

Serving Nampa, ID and surrounding areas

Approved

Super Service Award Winner

In business since 1989

Free estimates

Warranties offered

"I reached out to Angi’s list and was so lucky to connect with Mike! Mike promptly responded back to me and was able to help me get my moms gazebo put up that she had purchased on costco.com and they did not provide installation for. He was affordable and did a quick and thorough job. Based on her experience, we had him come out to our home to work on a faucet and a refrigerator. He also did a great job with us and I would highly recommend him and use him again. Thanks again, Mike"
Ceiling
Insulation
Trusses
Exterior
Framing

+18

Response time10 hrs
Response rate99%
Sublime Contracting, LLC
4.9(
10
)
Addition to Existing Structure - Build

Serving Nampa, ID and surrounding areas

Approved

In business since 2016

Credit card accepted

Offers commercial services

Remodeling kitchens, bath, flooring, whole home. Call 208-350-9394 for estimate. We love to work with customers to make the most out of their home or business space. Specializing in remodeling and flooring we have qualified staff and access to contractors to handle almost any job. Let's talk and see if we're right for you.

6 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Kidder & Co.
Kidder & Co.
5.0(
5
)
Addition to Existing Structure - Build

Serving Nampa, ID and surrounding areas

Approved

Free estimates

Small jobs welcome

Credit card accepted

Kidder & Co. brings a design-build approach to outdoor spaces — new construction installs, water feature work, and full landscape renovations. We treat every property with the same care and craftsmanship as the inside of a home, building things meant to last, not just get by.\n\nEvery project starts with a plan and ends with something built right. Licensed and insured in Idaho.\n\nLet's talk about what you're trying to build.

Landscape Installation
Landscape Installation
Retaining wall and sod prep
Landscape Installation
Landscape Installation

+1

1 neighbors recently requested a quote
Recommended by75%of homeowners
Avatar for Gem Valley Construction & Design LLC
Gem Valley Construction & Design LLC
5.0(
8
)
Addition to Existing Structure - Build

Serving Nampa, ID and surrounding areas

Approved

In business since 2016

Free estimates

Warranties offered

"We own a commercial construction business, a brother owns residential construction business. We are VERY familiar with quality work. Russ and Denis are the best we have ever met. There are nothing but positives. They are not the lowest bidder/cost, we have been there done that. Recommendation, learn from our bad experiences, you get what you pay for. We actually feel the value for quality is excellent. The communication is outstanding, not only did they keep us advised of every step, concern, question, but they responded to my questions immediately, even if they were on vacation. They are hard workers, always on schedule or advise if the schedule is interrupted why it was disrupted and what the plan is. And 100% honest. They added 10 feet to my garage. It is beautiful. Replaced a bay window. Replaced 2 sliding glass doors. We do plan on building a large shop in the future and doing a major remodel in the house. And will not hesitate to use them. They are beautiful people and do incredible work. Totally incredible."
Personal Shop with ADU
Framing Completed
Deck completed, awaiting metal rails
Truss Installation
Personal Shop with ADU

+72

Response time1 day
Recommended by71%of homeowners
Avatar for Comfort Expert Builders
Comfort Expert Builders
4.3(
15
)
Addition to Existing Structure - Build

Serving Nampa, ID and surrounding areas

Approved

In business since 2010

Free estimates

Small jobs welcome

"We had a great experience with Alex and his crew! I would highly recommend them for any work you need done. Our addition turned out wonderful and we LOVE IT! Thank you so much..."
Response time1 day
Response rate95%
9 neighbors recently requested a quote
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FAQs for addition to existing structure building service projects in Nampa, ID

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 Nampa, ID 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.