How to Convert a Crawl Space

Evaluate your crawlspace and foundation, with a certified builder, to determine if a conversion process will work and be cost-effective.

Design and draw up plans for the conversion. Consider hiring an architect, who has experience with crawl space conversions, to help with the plans. Decide, during this process, the potential relocation of heating ducts, plumbing and electrical lines. Also, decide whether to bring stairs down into the room from the inside or create entry only from the outside.

Hire an excavator to dig under the house to increase the necessary space and height of the crawl space. Find one who has experience with this type of work.

Have the excavator create a ramp for ease of access into the work area. They will then remove soil from the crawl space area to the agreed-upon size and height.

Reinforce or hire a building contractor to reinforce the foundation and structural supports. Do not attempt to do this yourself unless you know what you are doing.

Hire a concrete contractor to install new footings, foundation walls and slabs for your room.

Install a drainage system to keep water out of the new room and cover it with a stone base. Drainage should be placed on the uphill side of the retaining wall and under the new slab. Pour the concrete floor after the draining system is complete.

Frame in the walls for the room, as well as the entry point or points to the room. Move or install air handling, plumbing and electrical work or the room. Install insulation.

Drywall the room and add paint and flooring. Add other touches such as baseboards and crown molding, as desired.