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Top-Rated Basement remodelers in Alton - Updated Nov 2026

Avatar for A+ Constructors LLC
A+ Constructors LLC
New to Angi
Basement - Remodel

Serving Alton, MO and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

With years of experience serving the area, we are your solution for all your construction needs. We take great pride in our extreme professionalism, timeliness and superior customer service on every job. We make sure to develop a lasting relationship so that the next time service is needed there will be no question on who to call. Check out our 5 star reviews from happy customers! Call us today so we can discuss your needs and make a plan that fits your budget. Satisfaction guaranteed! \n \n

Avatar for Anchor Contracting
Anchor Contracting
5.0(
6
)
Basement - Remodel

Serving Alton, MO and surrounding areas

In business since 1996

Free estimates

Credit card accepted

"Anchor Contracting came out immediately and gave me a very fair bid to redo a deck and siding that had been damaged by a fire and was unsafe. The work they did was excellent, the price was right and was done exactly on time. The owner, Sean Ichrist, was courteous and professional. After the work was completed, all areas were cleaned of debris. His bid and final bill were exactly the same. As a property manager of a large condo complex, it is wonderful to deal with the honesty and professionalism that Anchor Contracting and Sean bring to the job. I look forward to working with Anchor again."
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+8

Recommended by100%of homeowners
Avatar for Homemade Design
Homemade Design
3.7(
322
)
Basement - Remodel

Serving Alton, MO and surrounding areas

In business since 2006

Credit card accepted

"Amanda was really very good!  At first I was very skeptical, thinking why did I pay money to just speak with someone on the phone about my kitchen remodel project... but after just a few minutes of her addressing some of the issues/questions I emailed to her earlier, I knew it was worth it.  It was very clear that she knew her business and she gave me several ideas that I had not even thought about.  I told her that I would definitely recommend her to friends and I will very likely use her again myself for my next home project!

"
Pennsylvania Master Bathroom
Boston Small Condo Kitchen
California Client Saves with HMD Designer Discounts
Recommended by54%of homeowners
B&J Remodel
New to Angi
Basement - Remodel

Serving Alton, MO and surrounding areas

In business since 2010

Free estimates

We're a locally owned and operated company with over 20+ years of experience that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor Home Improvement services that are customizable to each individual project. We specialize in Additions and Kitchen Remodels, but also offer a wide range of expertise for a variety of other projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction! \n

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Basement Remodel FAQs, answered by experts

There are several small, inexpensive upgrades you can make to upgrade your basement. Although you still need to adhere to building codes and obtain permits when necessary, you can complete small but mighty tasks like painting the masonry walls and installing entertainment devices to make the space more usable. 

The average cost of remodeling a basement is $30 to $75 per square foot. If your space is unfinished and looks like it may need more help, use the higher number when calculating your estimated basement remodeling costs. A good rule of thumb is to add an additional 20% to the top of your estimate to cover any “what if” situations.

Physically, the most challenging part of finishing a basement is installing egress windows or doors when the space is below ground level. Mentally, the hardest part may be envisioning the project and planning around load-bearing and mechanical obstacles.

The cost of finishing a basement is about $18,400 on average. As you can see, the framing portion of this project costs less, because you’re essentially just dealing with laying the foundation for a finished basement. The finishing portion of the project involves a lot more intricate work and design, as well as high-end materials.

It’s less expensive to finish your basement than it is to build an addition to your home. The average cost to refinish a basement is $32,000 (between $7 and $23 per square foot) while building an addition to your home costs $50,325 ($80 to $210 per square foot). Depending on the size of your basement and other factors, like moving plumbing and electrical, refinishing a basement is a more cost-effective option in most cases.

The Alton, MO homeowners’ guide to basement remodels

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