Basement Bedroom Addition Liberty Lake Otis Orchards, Washington
Turn unused Spokane basements into warm, livable square footage year-round
Basement Finishing Service in Otis Orchards, Washington
Basement Finishing in Spokane & the Inland Northwest
An unfinished basement is often the largest block of untapped square footage in a Spokane home. Stonegate Builders, a licensed general contractor serving Spokane, Spokane Valley, Liberty Lake, and Mead, turns that raw lower level into finished bedrooms, bathrooms, family rooms, home offices, and in-law or accessory living quarters. Every project is built with the strength, precision, and trust that define our work, so the finished space feels like a natural extension of your home rather than a converted cellar.
You get it, the subject of basement finishing is just one of those things in life you have to trust a professional to do. So feel free to skip all the reading and click the button below to get a quote now, or scroll down to learn more.
Get A QuoteWhat a Finished Basement Includes
A complete basement build brings the lower level up to the same standard as the rest of your house. Our scope typically covers:
- Framing of walls, soffits, and partitions to define new rooms
- Insulation and vapor control engineered for below-grade conditions
- Egress windows and wells for safe, code-required bedroom exits
- Electrical, plumbing, and HVAC rough-in and finish work
- Basement bathrooms, wet bars, and kitchenettes
- Drywall, flooring, trim, and paint for a fully finished feel
We coordinate every trade so the phases flow in the right order and the details line up, from outlet placement to door swings and lighting.
Our Process, Step by Step
- Consultation and assessment — we review your existing basement, moisture history, ceiling height, and goals
- Design and layout — we plan rooms, egress, and mechanical routing around your foundation
- Permitting — we pull the required permits and coordinate City of Spokane or Spokane County inspections
- Construction — framing, systems, insulation, and finishes are installed in sequence
- Final walkthrough — we verify inspections pass and the space meets your expectations
Moisture & Vapor Control for Our Climate
In the Inland Northwest, moisture management is the foundation of a lasting finished basement. Below-grade walls face ground moisture year-round, and Spokane's freeze-thaw cycles put real stress on foundations. We address drainage, sealing, and vapor barriers before a single wall goes up, and we frame with materials and details that resist trapped humidity. Getting this right protects your investment from mold, musty odors, and finish damage down the road, and it keeps the space healthy for the people who will use it every day.
Materials & Options
We help you choose finishes suited to below-grade living: moisture-tolerant flooring, insulated framing assemblies, and durable, easy-to-maintain surfaces. Whether you want a bright rec room, a quiet guest suite, or a functional accessory living space, we tailor the layout and material choices to how your family actually uses the home, balancing comfort, durability, and energy efficiency. Thoughtful lighting, sound control, and storage can turn a plain basement into one of the most-used rooms in the house.
Warmth, Comfort & Energy Efficiency
A properly insulated basement is one of the most effective ways to add comfortable living area in a region with cold, snowy winters. Thoughtful insulation and air sealing keep the lower level warm and help stabilize temperatures throughout the house, so your new space is inviting in January, not just July. A tighter, better-insulated lower level also reduces drafts and helps your heating system work less to keep the whole home comfortable.
Why Stonegate Builders
As a licensed, bonded, and insured Spokane contractor, we bring careful craftsmanship and local knowledge to every project. We understand regional building requirements, four-season conditions, and the permitting and inspection process across Spokane County and the surrounding communities. Our masonry and stonework background means we read foundations and below-grade structures with a builder's eye for what will last, and we treat your home with the care we would want in our own.
Ready to reclaim your lower level? Call Stonegate Builders at (509) 609-5199 to schedule a basement finishing consultation and start turning unused space into a room you'll love.
Basement Finishing FAQs
Stonegate Builders serves Spokane and the greater Inland Northwest, including Spokane Valley, Liberty Lake, Mead, Cheney, Deer Park, and surrounding communities. We bring local knowledge of regional building conditions and the area's permitting and inspection process to every basement project.
Many homeowners want a basement suite for guests, family, or added flexibility. Depending on your goals and local requirements, we can design a lower level with a bedroom, bathroom, and living area, and discuss what an accessory living arrangement involves. We will review layout, egress, and code considerations so you understand your options.
A properly insulated and air-sealed basement is one of the most effective ways to improve comfort in a home built for cold Inland Northwest winters. Insulating below-grade walls reduces heat loss and helps stabilize temperatures throughout the house, making the lower level genuinely comfortable year-round rather than cold and unused.
Timelines vary with the size and complexity of the project, the number of rooms and systems involved, and permitting and inspection schedules. A straightforward rec room moves faster than a multi-room build with a bathroom and egress work. After assessing your basement, we can walk you through a realistic sequence and the phases involved.
Yes. Basement bathrooms are one of the most valuable additions we build. The approach depends on your plumbing layout and how drainage is routed below the slab. During consultation we assess your existing systems and design a bathroom that fits your space, whether it is a simple half bath or a full bath for a guest suite.
Yes, finishing a basement typically requires permits, especially when adding bedrooms, bathrooms, electrical, or plumbing. As a licensed general contractor, we handle the permitting process and coordinate the required City of Spokane or Spokane County inspections, so your project is documented, code-compliant, and properly recorded for the future.
Moisture control comes first. Below-grade walls face ground moisture year-round, and Spokane's freeze-thaw cycles stress foundations. Before finishing, we evaluate drainage and any moisture history, then use appropriate sealing, vapor barriers, and moisture-tolerant assemblies. Addressing water and humidity up front protects your finished space from mold, odors, and damage over the long term.
Yes. Building codes require a compliant egress window or door in any basement bedroom to provide a safe emergency exit and natural light. As part of a basement finishing project, we plan egress openings and window wells that meet code and coordinate the required cutting, framing, and inspections so your new bedroom is legal and safe.
Cost depends on the size of the space, the number of rooms, and whether you add a bathroom, egress windows, or a kitchenette. Plumbing, moisture control, and higher-end finishes also affect the total. The most reliable way to understand your investment is a walkthrough, where we assess your basement and provide a written estimate based on your specific goals and existing conditions.