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Fixed-price contracts (the quote is the price) · 3D design before demolition · Walk-out lower levels, in-law suites, full entertainment basements · MI-code egress & Cascade Township permits handled · 4.7★ on Google
Real basement finishing for Cascade Township — from the Thornapple River corridor and Cascade Village core to the newer Forest Hills-border subdivisions. Real permits. Real MI-code egress. Real moisture and floor-leveling work before the drywall goes up.
Book Your Free Discovery CallEvery Cascade basement we finish starts with a conversation about whether the concrete floor is level (consistent grade) and whether it's flat (no high or low spots in a 10-foot run). One question. Two very different answers. Real implications for tile, LVP, and engineered hardwood. More walkthroughs on YouTube →
619 36th St SW, Wyoming, MI 49509 · By appointment only — we come to you for in-home consultations. · Open in Google Maps →
Cascade Township has the best unfinished square footage in Kent County — 9-foot pours, daylight windows, walk-out conditions on the river-grade lots, framed mechanicals already tucked to one side. The shell is there. The foundation is done. The question is which contractor actually treats your lower level like the rest of your house.
An estimate is a guess. A fixed-price contract is binding. Once design and scope are locked, the number we put in writing is the number you pay — no allowance games, no surprise change orders. The only way the number moves is if you choose to change scope, and that's priced and approved in writing before any work happens. See how the process works.
Our in-home consultation in Cascade is a working session, not a sales pitch. We measure the basement, sketch a real 3D model in front of you, and hand back a budget range tied to actual scope choices — bar vs. kitchenette, egress count, walk-out integration, finish level — before you commit to anything.
Every basement bedroom requires a code-compliant egress opening. Every habitable-space finish requires a Cascade Township permit, plus separate electrical, plumbing, and mechanical trade permits. We pull all of them, coordinate every inspection, and handle every interaction with the township as part of the fixed-price contract.
Every Thornapple client gets a private project portal with the full schedule, photo updates after each day on-site, change-order history, and a single point of contact. Most basement contractors expect you to chase them. We expect to manage the project so you don't have to.
Cascade Township housing splits into two broad eras. Newer subdivisions (2000s and on) sit on engineered slabs with 9-foot pours, daylight windows, often a daylight or full walk-out, and pre-stubbed mechanical for a future bath rough-in. Established subdivisions (1970s through 90s, plus the Cascade Village core) have 8-foot pours, more variable floor flatness, and occasional historical moisture from before modern damp-proofing standards.
The Thornapple River corridor is its own scope. Walk-out lower levels are common, the water table is closer to the slab, and grade-level moisture management is non-negotiable before any framing goes up. We inspect every Cascade basement for efflorescence, hairline foundation cracks, and history of seepage during the discovery call — not after demo.
The other Cascade reality: Forest Hills CDP covers the northern half of Cascade Township and parts of Ada and Grand Rapids Township. If your address falls inside the Forest Hills designation, your basement work still happens under Cascade Township permits as long as the parcel sits in Cascade. We confirm jurisdiction during the discovery call.
A kids' playroom finish and a full in-law apartment conversion are very different projects. The Thornapple process — discovery, 3D design, fixed price, build, walkthrough — is the same for both. Pick your scope below.
Defined family room, custom built-ins, ambient + task lighting, finished mechanical room, and the kind of trim work that reads as a real living floor — not a finished basement. Often the everyday room the whole household ends up in.
Acoustic-treated walls and ceilings, tiered seating risers, dedicated AV and lighting circuits, in-wall speaker pre-wire, and the right kind of dark room with the right kind of low lighting. Built in or alongside the broader lower-level finish.
Private entry (often through an existing walk-out door), full kitchen or kitchenette, dedicated bedroom with code-compliant egress, private full bath, separate climate zoning where possible, and acoustic ceiling-floor isolation. Built for parents, returning adult children, or long-term guest hosting.
A guest bedroom or kids' bedroom in the basement is one of the most common Cascade scopes — and it requires a real egress window. We handle excavation, the window unit, the well, and the cover. Sized to MI Residential Code R310 (5.7 sq ft minimum net clear opening, 20" wide, 24" tall, 44" max sill). Full egress guide here.
Full wet bar with sink, beverage center, ice maker, custom millwork, and lighting that flatters the bottles. Or a kitchenette with cooktop, fridge, and prep counter for an in-law suite. We rough in supply, drain, vent, and dedicated circuits per Cascade Township code.
Adding a full bath (or upgrading a builder rough-in into something usable). Below-grade plumbing, ejector pump considerations, ventilation, waterproofing, and finish-level tile design. Often pairs with our bathroom remodel service for higher-finish builds.
Rubberized flooring, mirrored wall, dedicated ventilation, sound-rated framing if it sits below a bedroom, and the right outlet count for the equipment you actually use. Often paired with a sauna or steam room in higher-end Cascade builds.
Open finished play space with durable flooring, washable wall finishes, layered lighting, lots of storage, and a layout that grows with the kids from preschool through middle school. The right starter scope when the rest of the lower level can wait.
Below are honest 2026 ranges for Cascade Township basements. Pricing depends on square footage, walk-out vs. full basement, egress count, bath count, kitchen ambitions, and finish level. Every project locks at a fixed-price contract after design. For the deeper breakdown, read our basement remodel cost in Grand Rapids page.
Insulation, drywall, flooring, recessed lighting, and a single egress window. Great for a kids' playroom, secondary living room, or workout space. Half bath optional. Floor leveling and moisture work priced separately.
Defined family room and bar area, dedicated guest bedroom with egress, full bath, custom millwork, upgraded lighting, finished mechanical room. The everyday lower level that earns its keep.
Full bar with sink and beverage center, theater or media room, full bath, guest bedroom, custom built-ins, wine display, statement lighting. The lower level your friends ask to host the party in.
Private entry (often through a walk-out), full kitchen or kitchenette, dedicated bedroom with code-compliant egress, private full bath, separate living area, zoned climate control. Built for parents, returning adult children, or long-term guest hosting.
Walk-out lower levels in the Thornapple River corridor often add $8,000 to $15,000 for grade-level moisture management, exterior threshold integration, and patio-side framing. Older Cascade subdivisions with 8-foot pours and historical moisture sometimes add a meaningful pre-finish adder — priced into the fixed contract during discovery so it never becomes a surprise change order mid-project.
Cascade Township requires a building permit for any basement finishing project that adds habitable space, plus separate trade permits for electrical, plumbing, and mechanical work. We pull every permit and schedule every inspection — rough-in, insulation, and final — directly with the Cascade Township Building Department. You never step into a municipal office.
Michigan Residential Code R310 (egress) is non-negotiable in any basement bedroom or habitable sleeping space. The minimum net clear opening is 5.7 sq ft, with a minimum 20-inch opening width and 24-inch opening height. Sill height tops out at 44 inches above the finished floor. Window wells (where the opening is below grade) must provide at least 9 sq ft of floor area with a minimum 36-inch projection from the foundation wall — and a permanent ladder or steps if the well is more than 44 inches deep. Most code-compliant retrofits end up around 28" x 44" or larger. We handle excavation, the window unit, the well, and the cover.
If your basement is being finished as open living space without a dedicated bedroom, you may not need an egress retrofit at all — daylight or existing walk-out openings often satisfy code in non-sleeping rooms. We confirm what your specific scope requires during the discovery call and price it into the fixed contract before you sign. Deeper detail in our complete basement egress window guide.
Concrete slabs are poured to industry-flat tolerance, not finish-flat. That's enough for the structural floor — not enough for LVP, engineered hardwood, or large-format tile, which need a tighter flatness spec. Most Cascade basements need either self-leveling underlayment in targeted spots or full-floor leveling before the finish flooring goes down. The conversation about whether your floor is level (consistent grade across the room) vs. flat (no high or low spots in a 10-foot run) is the conversation in the video at the top of this page.
Moisture management happens before we frame. We inspect the existing slab and foundation walls for efflorescence, hairline cracks, and any history of seepage; verify the perimeter drain; confirm the sub-slab vapor barrier (newer Cascade builds have it — some older homes do not); and design the wall assembly correctly. Closed-cell spray foam directly against foundation walls is the preferred approach on most Cascade basements. Where spray isn't right, we use rigid foam board with a proper framing standoff. We never frame tight to a foundation wall with kraft-faced batt insulation — that's a moisture trap and a long-term mold problem.
For walk-out lower levels along the Thornapple River corridor, we pay extra attention to exterior grade, door-threshold detailing, and patio-side flashing. Walk-out doors at the same grade as finished interior floor look great. Walk-out doors with a 4-inch sill change you didn't ask for — because the contractor didn't think about it — do not. We design that detail before the threshold gets ordered.
Real Thornapple lower-level builds. Descriptive names — no client names, no street addresses.
A full lower-level build for a Cascade-area home — custom bar with beverage center, media room with tiered seating, dedicated guest bedroom with code-compliant egress, full bath, and custom millwork throughout. The room the whole household ends up in.
Indoor golf simulator bay, lounge seating with custom built-ins, full bar with beverage center, and a primary-style bath. A lower level built around how the family actually relaxes — designed in 3D before any framing went up.
A river-corridor walk-out finished as a second living floor — kitchenette, dedicated bedroom with R310-compliant egress, full bath, lounge area, and a level threshold from the interior floor to the rear patio. Extra grade-level moisture management priced into the fixed contract before framing.
“Communication and work completed was high quality.”
— Verified Google review (4.7★ average across 19 reviews)
From our Wyoming office at 619 36th St SW, we cover Cascade Township and the neighboring communities. From a walk-out basement on the Thornapple River corridor to a Forest Hills in-law suite to an East Grand Rapids family-room finish, the same fixed-price, design-protected process runs every project.
The real questions Cascade homeowners ask before booking a basement finish — not the generic ones the other guys recycle.
Cascade basement finishing typically runs from about $40,000 for a basic open finish (drywall, flooring, lighting, single egress, no bath) up to $130,000+ for a full entertainment lower level with bar, theater, full bath, and guest suite. In-law suite and apartment conversions with full kitchens usually start around $120,000. Walk-out lower levels in the Thornapple River corridor often add $8,000 to $15,000 for grade-level moisture management, exterior door integration, and patio-side framing. Every project locks at a fixed-price contract once design and scope are finalized. Full breakdown on our basement remodel cost page.
Yes. Cascade Township requires a building permit for any basement finishing project that adds habitable space, plus separate trade permits for electrical, plumbing, and mechanical work. Thornapple pulls every permit and schedules every inspection — rough-in, insulation, and final — directly with the Cascade Township Building Department as part of the fixed-price contract. You never have to coordinate with the township.
Michigan Residential Code R310 requires an emergency egress opening in every basement bedroom and any basement used as habitable sleeping space. The minimum net clear opening is 5.7 sq ft, with a minimum opening width of 20 inches and a minimum opening height of 24 inches. Sill height cannot exceed 44 inches above the finished floor. Window wells (where the opening is below grade) must provide at least 9 sq ft of floor area with at least a 36-inch projection from the foundation wall, plus a permanent ladder or steps if the well is more than 44 inches deep. Most code-compliant retrofits land at roughly 28" x 44" or larger. Full guide: basement egress window requirements.
Yes — in-law suite and apartment conversions are one of the most-requested scopes in Cascade, especially in homes with walk-out lower levels. We design private-entry layouts (often through the existing walk-out door), full kitchens or kitchenettes, dedicated bedrooms with R310-compliant egress, private full baths, separate climate zoning where possible, and acoustic ceiling-floor isolation. We confirm zoning and accessory dwelling unit rules with Cascade Township before design begins. More on our basement apartment conversion guide.
Concrete basement slabs — even on newer Cascade builds — are poured to industry-flat tolerance, not finish-flat tolerance. That's enough for the structural slab but not for LVP, engineered hardwood, or large-format tile. Most Cascade basements we finish need either self-leveling underlayment in targeted spots or full-floor leveling before the finish flooring goes down. There is also a separate question of whether the floor is level (consistent grade across the room) versus flat (no high or low spots in a 10-foot run). We walk through that tradeoff — and what it costs — during the discovery call. The short YouTube video at the top of this page covers the tradeoff in two minutes.
Moisture management happens before we frame a single wall. We inspect the existing slab and foundation walls for efflorescence, hairline cracks, and any history of seepage; verify the perimeter drain system; confirm the sub-slab vapor barrier (newer Cascade builds have it; some older homes do not); and design the wall assembly with closed-cell spray foam against foundation walls or rigid foam board with a proper framing standoff. We never frame tight to a foundation wall with kraft-faced batt insulation — that creates a moisture trap and a long-term mold problem. For walk-out lower levels along the Thornapple River corridor, we pay extra attention to exterior grade and door-threshold detailing.
Yes — walk-out lower levels are common in Cascade, especially along the Thornapple River corridor and on the sloped lots in the newer subdivisions. Walk-outs change the scope in three meaningful ways: the existing walk-out door becomes a primary entrance (especially for in-law suites), egress requirements relax in rooms with grade-level access, and grade-level moisture management becomes more important. We design walk-outs to read as a real ground-floor living space rather than a finished basement — full-height windows, level threshold to the patio, finished trim that matches the rest of the home.
Most Cascade basement finishing projects run 8 to 14 weeks from demolition to final walkthrough. Simple open finishes (drywall, flooring, lighting, no bath) finish on the faster end. Full entertainment lower levels with bar, theater, and full bath — and in-law suites with full kitchens — typically run 12 to 16 weeks. Walk-out lower levels usually add a week for the exterior threshold and grade work. Every milestone is mapped in your contract and tracked in your project portal.
Our full basement finishing service page — scope, process, what's included, FAQs.
Real Grand Rapids-area basement remodel costs broken down by scope and finish level.
MI Residential Code R310 requirements, sizing, installation, and what a compliant egress retrofit costs.
In-law suites, returning-adult-child apartments, and accessory dwelling units in your existing lower level.
Our complete West Michigan remodeling service hub — kitchens, baths, basements, additions, whole-home.
Kitchen remodels, bathroom renovations, additions, and whole-home projects for Cascade Township.
It starts with a free discovery call — a quick phone conversation to discuss your project, get honest answers, and see if we're the right fit. No commitment. No pressure. Just clarity.
Book Your Free Discovery CallOr call us at (616) 404-3400
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