The average cost of basement remodeling varies based on the square footage of the basement space, if structural changes are needed, and if you are adding in elements such as electrical work for a kitchenette or plumbing for a half bath. Other factors in cost include whether you have design plans already and what work you want done on the finishes such as trim and flooring. Here’s a breakdown of the various cost factors. 

"We love that the basement now has a cozy feel yet is very on-trend and modern. It has doubled our square footage with very usable space and given us an additional bedroom and full bathroom. We used a beautiful door from the 1800s to line the wall behind the urinal in the bathroom, and we burned the cabinets in the dry bar and the bathroom countertop with a blowtorch to achieve a unique look. We lightly etched the concrete floors and then used a urethane, making a mirror-like finish that reflects light."
Carpet use to be the gold standard for basement flooring. Its soft and homey texture blended perfectly in basement remodels across the country. Furthermore, according to our flooring cost estimator, carpet is cheaper than both tile and hardwood flooring. However, carpet has lost recognition over the years and when it comes to flooding, no flooring option is more expensive to fix than carpet.

If you don’t know where to begin, basement waterproofing contractors or local home improvement stores will also be able to tell you what products are best for basement waterproofing. The basement waterproofing cost can be a little bit high but it is a worthwhile investment that will help your avoid a leaking basement. Insulating basement walls is another important step in your basement remodel. Basement insulation is essential to keep your basement and home warm during the winter without running up the heating bills. Framing a basement is what changes it from unfinished to finished. Framing basement walls can be a little tricky for those that have never done it before, but even the DIY homeowner can easily accomplish this task.
It was the start of a year-and-a-half basement finishing project, but it was well worth all of the effort. Jamin and Ashley of the home design blog The Handmade Home began by installing drywall over the cinderblock walls, applying spray foam insulation, and enclosing the necessary but ugly supporting adjustable steel posts. Next came paint, flooring, and furniture, all fusing together to make a lovely daylight basement for work and play.
Be your own general contractor and save 20% right away. It does take a lot of time, but it was worth the savings for me. I recommend that you...1. Read this book to learn the basics of each task 2. Find reputable contractors by using angie's list (craigslist contractors are usually cheaper but I would avoid). Use promo code SAVE25 to save 25% at angie's list.
Installing a bathroom in a basement costs more than installing a bathroom above ground. Costs can range from $2,500 to $5,000 on average, depending on the number of fixtures and whether the plumbing must be installed from scratch or if it’s roughed in already. Basement plumbing requires special considerations to ensure proper drainage and tie-in with the main sewer line, which may not be deep enough to allow the basement bathroom plumbing to use gravity the way above-ground plumbing does. Virgil Miranda’s Construction subcontracts all plumbing work. Miranda says that sometimes the toilet alone in a basement can cost up to $2,500 because sometimes homeowners need to invest in a toilet that does not use gravity but instead a macerating function to grind waste down to prevent clogging. Miranda estimates that each bathroom fixture in a basement costs $800–$900 on average, so a full, three-piece bath could cost $3,000 for the fixtures alone. Adding a kitchenette or wet bar sink adds more to overall refinishing costs. In addition, some basements require a French drain with one or more sump pumps, which can cost up to $10,000 on average, depending on how much ground the drain covers.

Accounting for variables such as square footage, materials, electrical and plumbing, the average basement remodel ranges from $11,034 and $29,226. Some cost as little as $5,000, with top of the line remodels costing over $40,000. The average cost to homeowners is $20,126. Expect to spend between $10 and $35 per square foot depending on the changes made.

Get 'labor only' bids and buy the materials yourself. This allows you to use a 10% off coupon at Home Depot or Lowe's (available on eBay). You can also use a 5% cash back credit card like Discover when buying materials. (BONUS: Our readers get $50 free when they get a Discover card - sign up here.) And be sure to join ebates first to save an additional 1%. These are all small percentages but when taken off potentially very expensive items they really add up.
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