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St. Louis Basement Finishing Specialists

Finishing your Basement is the easiest way to expand your Home's Living Area without the higher cost associated with building a Room Addition.

Whether you are wanting to add an extra bed room & bath for a teenager or an entertainment and play space for the whole family (that might include a bar and a home theater) building it in the basement can be done for about 1/3 the cost of building a room addition.

Top Ten Reasons for Finishing Your Basement

What ever is lacking in the rest of the home can be realized in the basement adding an extra bedroom, bathroom, family room, home theater space, bar/mini-kitchen, home office or hobby room.

Quite and Orderliness -- Warmth & Coolness
Children & Teens can take their Activities, Behavior, Music & Video Games to a clean and dry basement family room.
Many of our projects include insulating the ceiling which not only dampens the noise between floors, but helps to keep the basement living space toasty warm in the winter months and in the summer naturally the coolest place in the house.

Casual Comfortable Atmosphere
There is something about the casualness of a Finished Basement that allows family members and guests to relax in a way that is not as possible in the more formal upstairs living areas.
As a building contractor who has specialized in Finished Basement Projects for over 20 years, when I check back with folks, months or even years later I often find that their Finished Basement is by far the most frequented & enjoyed area of the house.

Investment & Resale
Dollar for Dollar .. Finishing your Basement offers the best value per square foot.. compared with a room addition. In many cases by adding an authentic bedroom with an egress window or a nicely designed bathroom .. the value of the home can be increased dramatically.

About Us

Basement Finishing Specialists is owned and operated by Steve Cassilly.

Steve has been a building contractor for over 30 years and has specialized in Finished Basement Projects for 21 years..

In that time frame the company has completed well over 100 Finished Basement Projects in the St. Louis Area.

Our practice is to work with the Homeowners Ideas and together with our experience, thoughtfully design the project, skillfully and cheerfully deliver Quality workmanship in a efficient and timely manner while keeping within an Affordable Budget.


George & Nancy's Basement Video
1st Promo Video
Better Homes & Gardens Article Video
Picture Gallery

Process for Getting Started

Call or Email Steve for an Appointment: 314-968-0999

Day of Appointment :
Allow 1 to 2 hours

Steve will discuss your design needs and ideas and will draw a floor plan that reflects the existing basement and the design concepts brought forth in that day's conversation.

Usually, further discussion & research is indicated to clarify design ideas and specifications.

When the necessary decisions are made with regard to design and materials the homeowner will be presented with a list of detailed specifications describing the scope of work and a professionally drawn floor plan illustrating those specs.

When the homeowners review and approve their selected specifications ..myself as a contractor will provide a written Bid..

Upon acceptance of this Bid I will then formalize this list of specifications and floor plan into a contract document.

When both parties have a signed contract in hand.. we usually can start within 2 weeks.

Contact Us

Basement Finishing Specialists
Steve Cassilly
405 E Swon Ave.
Webster Groves, MO

Basement Finishing Specialists
Steve Cassilly
405 E Swon Ave.
Webster Groves, MO

Proudly serving:
Des Peres
Creve Coeur
West County
and the greater St. Louis metro area