We turn underused basements into the best room in your house.
Trusted by homeowners in San Diego and surrounding areas
We don't do kitchens, decks, or roof work. Basements are all we do, which means we know the quirks of below-grade construction inside and out.
Our crew handles framing, electrical, plumbing, drywall, and flooring in-house. You get one point of contact instead of juggling multiple contractors.
We give you a detailed line-item estimate before any work begins. No vague allowances, no surprise charges at the end of the project.
We take your unfinished basement from bare concrete to a fully livable space. Framing, insulation, drywall, flooring, lighting — the whole package.
Moisture is the number one enemy of any basement. We install interior drainage systems, sump pumps, and vapor barriers to keep your space dry.
Adding a bathroom to your basement makes the space far more functional. We handle plumbing, tiling, fixtures, and ventilation from the ground up.
We offer a full lineup of basement services, from structural work to the finishing touches. Take a look at what we do and reach out when you're ready to get started.
Call or send a request with the property details, the service you need, and anything important about the project in San Diego.
We review the request, explain the service path, and make the scope feel easy to understand before work begins.
The work is completed with the same focus on communication, professionalism, and follow-through that customers expect from Cottonwood Basement Experts.
We don't do kitchens, decks, or roof work. Basements are all we do, which means we know the quirks of below-grade construction inside and out.
Our crew handles framing, electrical, plumbing, drywall, and flooring in-house. You get one point of contact instead of juggling multiple contractors.
We give you a detailed line-item estimate before any work begins. No vague allowances, no surprise charges at the end of the project.
We pull all required permits and schedule inspections with the city of San Diego. Everything is done to code so you never have to worry about it later.
The website is built to make the business feel professional, easy to contact, and grounded in the neighborhoods it serves.
"They turned our dingy basement into a real living space with a bathroom and kitchenette. The crew was respectful of our home and finished right on schedule."
"We had water issues for years and finally got them fixed before finishing the basement. Cottonwood handled the waterproofing and the buildout — no more damp smell and the space looks incredible."
"Honest pricing, no weird change orders, and the finished product looks exactly like what they showed us in the design phase. Would absolutely use them again."
Have a question? We've got answers. If you don't see what you're looking for, give us a call.
Call (619) 272-2364Costs vary depending on the size of the space and what you want to include, but most basement finishing projects in San Diego range from $30 to $75 per square foot. Adding a bathroom, egress windows, or custom features will push the price higher. We provide detailed estimates after an on-site visit so there are no surprises.
Yes, most basement remodeling work in San Diego requires a building permit, especially if you're adding electrical, plumbing, or changing the layout. We handle the permit process for you and make sure all work passes city inspections. Skipping permits can cause serious problems when you go to sell your home.
A typical basement finishing project takes between four and eight weeks depending on the scope. Projects that include plumbing, egress windows, or waterproofing may take longer. We give you a realistic timeline upfront and keep you updated throughout the process.
Absolutely. Finishing a basement without addressing moisture issues is asking for mold, warped flooring, and damaged drywall. We always assess moisture levels before starting a finishing project and recommend waterproofing solutions if there's any risk.
You can, but it needs to meet specific building code requirements including an egress window or door for emergency exit. The room also needs to meet minimum ceiling height and square footage standards. We make sure every basement bedroom we build is fully code-compliant.
Luxury vinyl plank is the most popular choice because it's waterproof, durable, and looks great. Porcelain tile and epoxy coatings are also solid options depending on how you plan to use the space. We help you weigh the pros and cons based on your specific basement conditions.
Contact us today for a free, no-obligation estimate. We serve San Diego and surrounding areas.
