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

Avatar for Icon Building Group
Icon Building Group
5.0(
15
)
Addition to Existing Structure - Build

Serving La Grange, IL and surrounding areas

Approved

In business since 2008

Free estimates

Warranties offered

"We hired this builder for an addition to our home and had a great experience from start to finish. The team was professional, responsive, and kept us informed throughout the entire project. They paid close attention to the details and made sure the new space blended beautifully with our existing home. The quality of the work exceeded our expectations, and we couldn’t be happier with the finished addition. I would highly recommend them to anyone considering a home addition or renovation."
Kitchen BEFORE
Kitchen BEFORE
Powder Room BEFORE
Living Room BEFORE
Loft BEFORE

+25

Avatar for Imperial 1 Construction Inc.
Imperial 1 Construction Inc.
5.0(
9
)
Addition to Existing Structure - Build

Serving La Grange, IL and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"Kept appointment, honored original quote, did additional work for minimal cost. Extremely pleasant to work with, kept me up to date with progress and did a great job. Finished job looks amazing. Will definitely hire again."
Residential Remodeling
Bathroom Remodel
Industrial Business Roofing Project
Industrial Rehab
Residential home redesign and renovation

+9

Response time1 day
Response rate100%
1 neighbors recently requested a quote
A P Builder & General Contractor LLC
4.1(
98
)
Addition to Existing Structure - Build

Serving La Grange, IL and surrounding areas

Approved

Warranties offered

Customers say: Super punctual

"Angelo did everything as planned. We walked over the construction plans before construction started. Site drawing detailed how the finished room addition and sun porch would look after the job was completed. Wife and I were completely satisfied with the finished job. Ready for summer 2021 with or without COVID... Construction crew (Framers) did a fantastic job. Always arrived on time and job was completed on time. Will be happy to recommend AP Builders for any residential construction project."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+16

Response time5 days
Response rate99%
4 neighbors recently requested a quote
Avatar for Clean Edge Construction, Inc.
Clean Edge Construction, Inc.
5.0(
12
)
Addition to Existing Structure - Build

Serving La Grange, IL and surrounding areas

Approved

In business since 2010

Free estimates

Warranties offered

"They built a full porch after they took down my existing small stoop porch. It looks better than I could have ever imagined. They explained everything as they went was a great experience."
1
2
3
4
5

+89

Response time1 day
37 neighbors recently requested a quote
Recommended by45%of homeowners
Avatar for DESIGNFirst Builders
DESIGNFirst Builders
3.6(
37
)
Addition to Existing Structure - Build

Serving La Grange, IL and surrounding areas

Approved

In business since 2001

Free estimates

Warranties offered

"We received multiple estimates, and decided to go with DesignFirst Builders for numerous reasons. Promptness, Showroom, the amount of different types of cabinets, counters, tiles, flooring and more. They also had numerous prices and quality from low to high depending on the cost of the addition to which build. From the start to finish of the project we dealt with multiple architects, designer's and project managers. Anytime we called or left a voice message we were contacted within the hour. Lastly I want to give a shout out to our project manager, ( Rick Divito ). Rick went above and beyond from the begining to the finish of our addition to make sure everything was perfect. If you want your project to be perfect I highly recommend using Designfirst Builders. They are the best !"
Wet bar and Dining
Kitchen
Wet Bar
Bathroom
Kitchen

+366

Response time8 hrs
Response rate87%
17 neighbors recently requested a quote
Avatar for Genstone Construction
Genstone Construction
5.0(
5
)
Addition to Existing Structure - Build

Serving La Grange, IL and surrounding areas

Approved

In business since 2018

Free estimates

Warranties offered

We bring over 40 years of expertise in bespoke home renovations crafted to reflect your vision, lifestyle, and standards. From gourmet kitchens and spa-inspired bathrooms to seamless additions and full-home transformations, our work is defined by timeless design, superior craftsmanship, and a client-first approach.\nOur elite team delivers a seamless experience from concept to completion, managed with meticulous attention to detail ensuring daily progress, quality, and clear communication.\nWe don’t ask for upfront payments - because trust is earned, not expected. Work begins only once permits are secured and materials are ready, ensuring complete transparency. Clients are fully protected with contractor liability insurance and receive lien waivers with each payment milestone.\nNo two homes and our custom process ensures a tailored renovation experience that delivers luxury without compromise and beauty without the burden.

New kitchen remodel
Kitchen Remodel
Bathroom
Bathroom
My jobs

+8

Response time1 day
T6 Construction & Development, Inc.
3.6(
7
)
Addition to Existing Structure - Build

Serving La Grange, IL and surrounding areas

Approved

In business since 2006

Free estimates

Credit card accepted

We're a well established business with over 20 years of unmatched expertise. Customer preference and priorities are always first. We're very timely with our work, and never lose attention to detail. T6 Construction & Development, Inc., has built a reputation for quality work with each satisfied customer. Our sense of pride is apparent in every restoration we complete. Call T6 Construction & Development, Inc., today, and we'll be there in your time of need.

1 neighbors recently requested a quote
Recommended by100%of homeowners
Aseret Development Series LLC
5.0(
2
)
Addition to Existing Structure - Build

Serving La Grange, IL and surrounding areas

Approved

In business since 2007

Free estimates

Warranties offered

"

Teresa is EXTREMELY  creative and talented. I love her slogan  "May I make a suggestion" her ideas and suggestions were well executed and personalized to my style . . Her team is also courteous and reliable, they weren't messy and disposed of all trash items and cleaned the area spotless after working. I would definitely refer her company to EVERYONE !!

"
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Recommended by100%of homeowners
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FAQs for addition to existing structure building service projects in La Grange, IL

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 La Grange, IL 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.