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

Avatar for MPT Enterprises Inc
MPT Enterprises Inc
4.8(
182
)
Addition to Existing Structure - Build

Serving Lake Forest, IL and surrounding areas

Approved

In business since 2001

Free estimates

Warranties offered

"Paul is fantastic to work with. I've worked with his company on several different projects over the past 5 years - kitchen remodel, front porch remodel, stairwell rebuild. His team is knowledgeable, responsive and good at what they do. Can't recommend him enough."
Remodeling - General Project
Remodeling - General Project
Additional Photos
Additional Photos
Additional Photos

+167

Response time6 hrs
Response rate100%
2 neighbors recently requested a quote
Avatar for FB Construction, Inc.
FB Construction, Inc.
4.9(
77
)
Addition to Existing Structure - Build

Serving Lake Forest, IL and surrounding areas

Approved

In business since 1988

Free estimates

Warranties offered

"Our initial contact with Igor was excellent. He is very knowledgeable about windows and very helpful in explaining things to us. The team promptly arrived at 7: 00 am. The work was done in a professional manner. They were kind, considerate and when they finished each day, everything was cleaned up. They showed us how to operate the newly installed windows. I am pleased with the finished product. I would definitely hire FB Construction to do additional projects around my home."
 Exterior
 bathroom
 bedroom
 family / living  room
 Double sink

+16

Response time1 day
3 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Icon Building Group
Icon Building Group
5.0(
15
)
Addition to Existing Structure - Build

Serving Lake Forest, IL and surrounding areas

Approved

In business since 2008

Free estimates

Warranties offered

"It was great to work with Icon Builders to building our dream home. They went out of their way to accommodate the completion of our home build in time for school. Their response times are great and the staff is truly personable. It was great working with Jenna, Natalia, Joe, Scott, Shawna and Charlie. I will recommend Icon to anyone looking to build a custom home."
Kitchen BEFORE
Kitchen BEFORE
Powder Room BEFORE
Living Room BEFORE
Loft BEFORE

+25

Avatar for Creative Building Solutions
Creative Building Solutions
5.0(
12
)
Addition to Existing Structure - Build

Serving Lake Forest, IL and surrounding areas

Approved

In business since 2004

Free estimates

Warranties offered

"We hired Tim to remodel our 50+ year kitchen. He brought the kitchen to code first and then did an amazing job with every detail of the remodel. My husband and I could not be happier and highly recommend Creative Building Solutions. Additionally, he communicates in a timely manner and keeps to his budget. Thank you Tim."
Kitchen Remodel
Kitchen Remodel
Kitchen Remodel
Bath Remodel
Bath Remodel

+20

Response time10 hrs
Response rate91%
Recommended by100%of homeowners
A P Builder & General Contractor LLC
4.1(
98
)
Addition to Existing Structure - Build

Serving Lake Forest, IL and surrounding areas

Approved

Warranties offered

Customers say: Super punctual

"We recently had our basement bathroom redone due to water damage from broken water pipes. It was a pleasure working with Angelo and his team who were all very professional and experienced. Angelo was in constant contact and made sure that all work was performed to my satisfaction."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+16

Response time5 days
Response rate99%
4 neighbors recently requested a quote
Avatar for Quintessential Renovations, Inc.
Quintessential Renovations, Inc.
4.7(
38
)
Addition to Existing Structure - Build

Serving Lake Forest, IL and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"They do phenomenal work! I had them finish my basement, and it turned out absolutely outstanding. I had a lot of specific design details and custom touches I wanted incorporated, and they took the time to understand every single one, making sure everything was executed to absolute perfection. Their craftsmanship and attention to detail are second to none. I would definitely hire them again in a heartbeat and give them my highest recommendation to anyone looking for top-tier work!"
Kitchen
Master Bathroom
Mixed project photos
Modern Bathroom
Kitchen

+97

Response time1 day
Recommended by70%of homeowners
LCF Consulting
4.6(
10
)
Addition to Existing Structure - Build

Serving Lake Forest, IL and surrounding areas

Approved

In business since 2000

Free estimates

Warranties offered

"They were responsive, got the job done quickly and it looks great. We had two pillars removed and replaced. concrete was laid to keep them level and they painted all of the wood on the front of our house from black to white. Everyone was friendly to work with. I would definitely use them again for future house projects."
Garage addition
New Laundry Room
Shower in new bath
4 Season Room
4 Season Room

+40

Response time2 days
Response rate92%
2 neighbors recently requested a quote
Avatar for T&K Builders LLC
T&K Builders LLC
4.2(
10
)
Addition to Existing Structure - Build

Serving Lake Forest, IL and surrounding areas

Approved

In business since 2024

Emergency services offered

Warranties offered

"contacted T&K Builders after discovering mold in my exterior wall, and their response was immediate and professional. The team quickly demolished the affected area and installed the necessary structural supports to safely hold the roof. Everyone on site worked efficiently, communicated clearly, and maintained a high level of professionalism throughout the process. They kept the site clean, protected materials from the elements, and were extremely organized—especially important since we received over four inches of snow the following day. From start to finish, the experience was seamless and stress-free. Their attention to detail, workmanship, and respect for the property truly set them apart. I would absolutely recommend T&K Builders for any future projects and would not hesitate to call them again."
Mall Dr Shell remodel
72 neighbors recently requested a quote
Avatar for DemoWorks
DemoWorks
4.3(
26
)
Addition to Existing Structure - Build

Serving Lake Forest, IL and surrounding areas

Approved

In business since 2019

Free estimates

Customers say: Quick response

"Amazing experience with DemoWorkers. Monfilio and Drake were workhorses. They did in 2-1/2 days what would have taken me two months to do by myself. They took my goals and concerns into consideration and communicated with me every step of the way. They have the tools and the understanding of building systems to make it all look so easy. I was overwhelmed going into Monday morning but by Wednesday afternoon the work was done. It s Friday now and I still find myself standing in the space wondering how the two of them got it all done. My stress has evaporated and I am ready to get on with the construction. It was an unbelievably good experience to work with them. I have some follow up demolition coming up and I will definitely be hiring them again."
Kitchen 1
Modern Kitchen
Bathroom 1
Modern Condo Remodel 2
Bathroom

+74

Response time1 day
Response rate97%
3 neighbors recently requested a quote
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FAQs for addition to existing structure building service projects in Lake Forest, 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 Lake Forest, 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.