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

Avatar for Emergent Builders
Emergent Builders
5.0(
12
)
Addition to Existing Structure - Build

Serving Rock Island, IL and surrounding areas

Approved

In business since 2016

Free estimates

Credit card accepted

"Cajun and Eric took care of everything, including disposing of a few additional items. They were professional and easy to work with. Cajun kept in touch with me from beginning to end, and I'm hoping that U can get them in for future projects. Thank you guys, awesome!!!"
Response time3 hrs
Recommended by100%of homeowners
Avatar for Next Gen Construction
Next Gen Construction
4.7(
15
)
Addition to Existing Structure - Build

Serving Rock Island, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Emergency services offered

"Quit simply, the best! Fair price, cordial, and on time. In addition, he assisted with another project I needed done that day. Hired again to install a ceiling fan on a high ceiling. I will reach out time and time again for the assuredness of a job well done!"
Modern Bathroom Remodel
Modern Kitchen
Basement remodel
Basement remodel
Basement remodel

+8

Response time2 days
16 neighbors recently requested a quote
Recommended by33%of homeowners
Avatar for Hansen Building & Renovations, LLC
Hansen Building & Renovations, LLC
5.0(
2
)
Addition to Existing Structure - Build

Serving Rock Island, IL and surrounding areas

Approved

In business since 2024

Free estimates

Offers commercial services

"Wade does 95% of the work himself. Bid was more than fair for our project and there were no cost overruns. I was very pleased with the quality of the work and so was the city building inspector. Wade handled changes to the project when we had to move a door and stairs to a different wall midway through the project. We've already hired him for another project."
Response time3 days
Avatar for Colestruction LLC
Colestruction LLC
4.9(
19
)
Addition to Existing Structure - Build

Serving Rock Island, IL and surrounding areas

In business since 2021

Free estimates

Emergency services offered

"Cole did a fantastic job laying the flooring. It turned out beautiful. I had some concerns around some very old trim and stated to him I didn’t care for the way it was left. He was very willing to discuss my concerns and made an appointment to come back and take care of it at no charge. Thanks Cole! Glad customer satisfaction is important to you!"
Remodeling - Kitchen & Bathroom Project
Handymen Project
Remodeling - General Project
Remodeling - General Project
Remodeling - General Project

+86

Recommended by100%of homeowners
Avatar for BuildRite Home Pro's LLC
BuildRite Home Pro's LLC
5.0(
6
)
Addition to Existing Structure - Build

Serving Rock Island, IL and surrounding areas

In business since 2022

Free estimates

Credit card accepted

"They did an amazing job and were super helpful! I love the deck work they did and how friendly they were to have around. Excellent work, great price for the work, and I would love to have them around again to work on some other projects in the future."
Decks & Porches Project
Sun Room
Sun Room
Decks
Siding

+108

Recommended by100%of homeowners
Agape Construction & Improvement
4.0(
60
)
Addition to Existing Structure - Build

Serving Rock Island, IL and surrounding areas

In business since 2009

Free estimates

Emergency services offered

"

Brady is the best you'll ever find for home remodeling projects.
Showed up on time. Took the time to make ever job right.
Projects were worked on over a number of months, one at a time.


The best and most honest tradesmen I've ever found.
We moved to Texas in January of 2014.  We whish Brady could have come with us.
I've found some good (and bad) people to work on the Texas home.  But no one who comes close to the quality of work done by Brady Brower.
"
Additional Photos
Additional Photos
Additional Photos
the home owners are very happy!
all done!!

+1

Recommended by90%of homeowners
Avatar for Homemade Design
Homemade Design
3.7(
322
)
Addition to Existing Structure - Build

Serving Rock Island, IL and surrounding areas

In business since 2006

Credit card accepted

"It is a waste of money. The great majority of people are not going to find any value out of the service. If you need design consultation, you need a full service consultation. If you already have knowledge and experience, and you just need to get a few ideas, then you don't need to pay for that. You can just get a magazine or a book since you already have the knowledge of basic designs in your head or a little bit of experience. To have someone call you and give you information over the phone, you are not getting the personal service that you need. You may as well take the money $49 and apply it to something else like getting someone else to come out and give you the service that you need. Because, you are not getting much, you are not getting anything at all. They are going to have you do the work. After talking to them and I was talking to other home designers, I found out that that was a waste of time and waste of money. I gave them a C because they didn't fail at what they do but they don't offer any value for what they do. There's not much value to it. The cost was fair. They didn't do a terrible job and the cost isn't terrible, it was only $49. It just has a very low value. For responsiveness I gave them a B because they will answer your phone and answer your emails."
Pennsylvania Master Bathroom
Boston Small Condo Kitchen
California Client Saves with HMD Designer Discounts
Recommended by54%of homeowners
Avatar for Fowler Construction, LLC
Fowler Construction, LLC
5.0(
6
)
Addition to Existing Structure - Build

Serving Rock Island, IL and surrounding areas

In business since 2018

Free estimates

Credit card accepted

"When I asked for referrals for someone to put a culvert in on our property prior to our home being built I was immediately given Randy Fowlerâ s name. I fully understand why. His communication and persistence in finding the materials needed to get the job done in a very timely manner was impeccable. The job was incredibly well done. I would highly recommend Randy Fowler LLCâ ¼ï¸"
Response time1 day
Recommended by100%of homeowners
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FAQs for addition to existing structure building service projects in Rock Island, 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 Rock Island, 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.