Basement Remodeling & Finishing in Waukesha & Lake Country, WI
Your lower level can be the room everyone gathers in. Platinum Renovations is a family-owned design-build firm based in Pewaukee. We design and build lower levels for homeowners across Waukesha County and Lake Country: family rooms, wet bars, theaters, guest suites and more.
2025 NARI Remodeler of the Year Silver Award, for our Muskego basement with golf simulator, presented by NARI Milwaukee.
Email: info@platinumrenovationswi.com
Office: (262) 326-0207
An Award-Winning, Family-Owned Design-Build Team
We're a local family business, and we treat your home with the same care we give our own. One team handles your project from the first conversation to the final walkthrough: design, selections, permits, framing, plumbing, electrical and finishes. You always know who to call.
That approach earned our Muskego golf simulator basement a 2025 NARI Remodeler of the Year Silver Award. It started as an unfinished basement with exposed mechanicals. It's now a lower level with a golf simulator, full kitchen, theater area, gym and full bath.
What We Build in Lower Levels
Most of our basement projects combine several of these spaces into one plan.
Family Rooms & Rec Spaces
A comfortable place to watch the game, play with the kids or host friends, with lighting, built-ins and storage planned around how your family uses the space.
Wet Bars & Kitchenettes
From a simple beverage station to a full second kitchen, we plan the plumbing, cabinetry and countertops together. Our Hartland and Muskego projects both center on the bar.
Home Theaters & Media Rooms
Dedicated theaters, open media lounges, lighting control and wiring, all designed before the walls close. See our media rooms page for more.
Golf Simulators
Simulator rooms need the right ceiling height, room depth, screen placement and impact protection. Learn what to plan for in our golf simulator guide.
Guest Suites & Lower-Level Baths
A bedroom, a full bath and a place for guests to unwind. We handle the plumbing and layout, and our bathroom remodeling team designs the bath to match the rest of your home.
Home Gyms
Durable flooring, mirrors, good lighting and ventilation give you a workout space you'll actually use.
Built for Wisconsin Basements
Moisture Comes First
Before we finish a basement, we look for signs of moisture during our visit to your home. Waterproofing isn't part of our services. If it's needed, a waterproofing specialist completes it before finishing begins, and we're happy to refer a trusted trade partner.
Egress Windows & Code
A basement bedroom needs a code-compliant egress window. We plan egress windows into the design so your guest suite is safe and meets local code.
Insulation, Comfort & Mechanicals
We plan insulation, heating and cooling, and electrical so your lower level stays comfortable through Wisconsin winters.
Flooring for Below-Grade Spaces
Concrete slabs stay cool and can wick moisture, so flooring choice matters. Compare LVP, carpet, tile and epoxy in our basement flooring guide.
Permits & Inspections
We handle the permits and inspections required for the work we do, and we coordinate directly with your municipality.
Our Signature Process
-
Complimentary phone consultation. Tell us about your lower level and what you'd like to do with it, and we'll talk through budget.
-
Visit to your home. We see the space, ask questions and look at what's behind the walls and above the ceiling.
-
Preliminary ballpark estimate. A courtesy estimate so you know where your project stands before you commit to design. Please allow 7 to 10 business days after our visit for us to put it together.
-
Design agreement and selections. We design the space and create renderings so you can see the layout and finishes before construction. Then we make selections together.
-
Construction and final walkthrough. Our team builds your lower level, then walks through every detail with you at the end.
Investing in Your Lower Level
Every project is custom. Most basement projects begin around $75,000, and we discuss budget on a complimentary phone consultation. For a closer look at what drives cost, read How Much Does It Cost to Finish a Basement in Wisconsin? See sample estimates for lower-level projects.
What Our Clients Say
“We had a long list of projects to tackle, including the kitchen, hardwood flooring, family room fireplace wall, laundry room, primary bathroom, guest bathroom, and an existing bedroom, bathroom and bonus room in a partially finished basement, plus much more. … We absolutely love our newly renovated home and couldn’t be more pleased with the results!”
— Michael and Pandré S., Hartland, WI · Google review
Serving Our Local Communities
From our office in Pewaukee, we design and build lower levels throughout Lake Country and Waukesha County. That includes basements in Brookfield, Lisbon, Hartland and Muskego.
Lake Country: Oconomowoc, Delafield, Hartland, Nashotah, Pewaukee and Summit
Waukesha County: Brookfield, Waukesha, New Berlin, Muskego, Sussex and Menomonee Falls
Milwaukee Suburbs: Wauwatosa, West Allis, Germantown and Mequon
Serving Pewaukee: learn more about home remodeling in Pewaukee.
Serving Waukesha: learn more about home remodeling in Waukesha.
Frequently Asked Questions
How much does it cost to finish a basement?
Every project is custom. Most basement projects begin around $75,000, and we discuss budget on a complimentary phone consultation. Our basement cost guide explains what affects the number.
Do you handle permits and inspections?
Yes. We handle the permits and inspections required for the work we do and coordinate with your municipality.
Do I need an egress window for a basement bedroom?
Yes. A basement bedroom needs a code-compliant egress window. We'll look at your space during our visit and plan egress into the design.
Do you do basement waterproofing?
Waterproofing isn't part of our services. We look for moisture concerns during our visit to your home. If waterproofing is needed, a specialist completes it before we begin finishing, and we're happy to refer a trusted trade partner.
Can you add a bathroom or wet bar to my basement?
Yes. We plan the plumbing, layout and finishes for lower-level baths, wet bars and kitchenettes as part of the design.
What's the best flooring for a basement?
It depends on how you'll use the space and your slab's conditions. Our basement flooring guide compares LVP, carpet, tile and epoxy.
Can you build a golf simulator room?
Yes. Our award-winning Muskego basement includes one. See our golf simulator guide for what to plan.
How involved will I be in the design?
As involved as you'd like. We walk you through layouts, renderings and selections until the plan feels right.
Is my basement a good candidate for a full remodel?
Most basements can be transformed. We look at ceiling height, mechanicals, moisture and egress during our visit to your home.
What happens on the complimentary phone consultation?
We'll talk about your lower level, how you want to use it and your budget, then set up a visit to your home if it makes sense to move forward.
Keep exploring
Connected Main Level
Hartland, WI
Start Your Lower-Level Remodel
Ready to make your basement the best room in the house? Let's talk about it.
Email: info@platinumrenovationswi.com
Office: (262) 326-0207