Pool House Cost in Boise & the Treasure Valley: 2026 Pricing Guide
What Determines the Cost of Building a Pool House?
A pool house transforms your backyard from a swimming area into a complete outdoor living destination. For homeowners in Boise, Eagle, Star, and across the Treasure Valley, the pool house cost depends on what you’re building — from a simple changing room to a fully equipped guest suite. With summer temperatures routinely reaching the 90s and a strong culture of outdoor entertaining, the Treasure Valley is an ideal setting for this kind of investment.
This guide breaks down pool house costs by type, covers the materials and site work that drive pricing, and addresses the Idaho-specific considerations that affect your project.
Pool House Cost by Type
The scope of your pool house has the most dramatic impact on cost. Here’s what Boise-area homeowners are paying:
| Pool House Type | Typical Size | Estimated Cost Range | Key Features |
| Basic Changing Room / Storage | 150 – 300 sqft | $30,000 – $60,000 | Changing area, storage, basic electric |
| Pool Cabana with Bathroom | 250 – 500 sqft | $60,000 – $120,000 | Bathroom, changing room, covered seating |
| Full Guest Suite Pool House | 500 – 1,000 sqft | $120,000 – $250,000+ | Bedroom, kitchen, bathroom, living area |
| Entertainment Pavilion | 400 – 800 sqft | $80,000 – $180,000 | Open-air or semi-enclosed, outdoor kitchen, bar |
Basic Changing Room and Storage ($30,000 – $60,000)
This is the most straightforward pool house option — a compact structure that gives your family a place to change, store pool toys and furniture, and keep cleaning equipment. These buildings are typically wood-framed with siding that matches your home, include electrical for lighting and outlets, and may have a covered porch area for shade.
At this price point, you’re not including plumbing, which keeps costs significantly lower. The structure itself is similar to a high-quality shed, but purpose-built with proper ventilation, durable finishes that resist moisture, and an architectural style that complements your home.
Pool Cabana with Bathroom ($60,000 – $120,000)
Adding a bathroom is the single biggest upgrade that separates a basic pool house from a truly functional one. A pool cabana with a full or three-quarter bathroom eliminates the need for dripping-wet swimmers to walk through your main house — which is the number one reason Treasure Valley homeowners invest in a pool house.
These structures typically include a changing room, a bathroom with shower, covered outdoor seating, and storage. Plumbing adds $15,000 to $30,000 to the project cost, depending on the distance to your main sewer or septic connection and whether a sewer line extension is required.
Design Tip: Consider positioning the bathroom entrance so it’s accessible from the pool deck without walking through the changing room. This small design decision dramatically improves usability when hosting guests.
Full Guest Suite Pool House ($120,000 – $250,000+)
A guest suite pool house is essentially a small, self-contained home adjacent to your pool. These structures include a bedroom or studio sleeping area, a full bathroom, a kitchenette or full kitchen, a living area, and often a covered patio or porch. At this level, the pool house serves multiple purposes — guest accommodations, a home office, a private retreat, or even rental income potential.
Construction costs at this level reflect the complexity of a small residential build: full foundation, framing, insulated walls and ceiling, HVAC, plumbing, electrical, and complete interior finishes. Many of our clients in Eagle and Star choose this option because it adds significant flexibility and value to their property.
Entertainment Pavilion ($80,000 – $180,000)
Entertainment pavilions are designed for hosting. These can be open-air structures with a roof and support columns, or semi-enclosed spaces with retractable screens or glass walls. They typically include an outdoor kitchen area with a built-in grill, bar seating, a sink, a refrigerator, and comfortable lounge areas.
The cost varies based on how much is open-air versus enclosed, the quality of kitchen appliances and countertops, and whether the structure includes utilities like gas for cooking and running water.
Materials Breakdown
Material selection significantly impacts both cost and longevity. Here’s how common material choices affect pricing:
Foundation
Concrete slab ($8 – $15/sqft) is standard for pool houses. Elevated foundations with post-and-beam construction cost more but work well on sloped lots.
Framing
Standard wood framing is the most common and cost-effective option. Steel framing adds 20-30% but offers superior durability and resistance to moisture.
Roofing
Architectural shingles ($4 – $7/sqft) are the most popular choice. Metal roofing ($8 – $14/sqft) lasts longer and handles Idaho’s snow loads well. Cedar shake or tile add premium character at $12 – $20/sqft.
Exterior
Matching your home’s siding is important for visual cohesion. Fiber cement ($6 – $12/sqft installed) is durable and low-maintenance. Natural stone or stacked stone accents ($15 – $35/sqft) add a high-end look.
Countertops (for kitchens/bars)
Granite ($50 – $100/sqft installed), quartz ($55 – $120/sqft), or natural stone ($60 – $150/sqft). Outdoor-rated materials that resist UV and temperature swings are essential for exposed countertops.
Site Preparation and Utility Costs
Beyond the structure itself, site preparation and utility connections add to your total investment:
Site Preparation: $3,000 – $15,000. This includes grading, compaction, and drainage work. Pool areas often have unique grading requirements to manage water runoff away from both the pool and the pool house foundation. Properties with slopes or drainage challenges may require retaining walls or French drain systems.
Utility Connections: $5,000 – $20,000. Running water, sewer, gas, and electrical lines from your main house to the pool house location is a significant cost driver. The distance matters — every additional foot of underground utility line adds cost. Plan for trenching, backfilling, and landscape restoration along the utility route.
Septic Considerations: If your property uses a septic system (common in Star, Eagle, and Emmett), adding a bathroom to your pool house may require upgrading your septic capacity. A septic evaluation costs $500 to $1,000, and an upgrade can run $5,000 to $15,000.
Building Permit Requirements for Pool Houses in Idaho
Every pool house project in the Treasure Valley requires building permits and local approval. Requirements vary between jurisdictions, but most pool houses with electrical, plumbing, or conditioned living space will require full permit review before construction begins.
Ada County (Boise, Eagle, Star, Meridian, Kuna, Garden City): Permits are issued through the city’s building department or, for unincorporated areas, through Ada County Development Services. You’ll need architectural plans, a site plan showing setbacks, structural engineering calculations, and energy compliance documentation. Plan review typically takes 2 to 4 weeks, though complex projects may take longer.
Canyon County (Nampa, Caldwell, Emmett): Canyon County handles permits through its Development Services department, with similar requirements. Processing times can vary but generally align with Ada County timelines.
We manage the entire permitting process for our clients — from preparing permit-ready drawings to scheduling and attending inspections. You’ll never have to stand in line at a permitting office or decipher code requirements on your own.
Winterizing Your Pool House for Idaho’s Climate
Idaho’s winters bring temperatures well below freezing — often into the single digits or teens in the Treasure Valley. If you want your pool house to function year-round (or simply survive winter without damage), winterizing is essential.
Insulation: Walls should have R-21 minimum insulation, ceilings R-38 or higher. Spray foam insulation provides the best moisture barrier and thermal performance for pool house applications.
HVAC: A mini-split heat pump system ($3,000 – $8,000 installed) is the most efficient option for pool houses. It provides both heating and cooling without ductwork, making it ideal for smaller structures.
Plumbing Protection: All water supply lines should be insulated, and the pool house should have accessible shut-off valves so the water supply can be drained for winter if the building isn’t heated continuously. Frost-proof hose bibs and freeze-proof fixtures are standard for Idaho construction.
Windows and Doors: Double-pane, low-E insulated glass is the minimum standard. For unheated pool houses, ensure all windows can be fully sealed during winter.
Total winterizing cost: $10,000 to $30,000 beyond the base construction cost, depending on the level of climate control and the size of the structure.
Permits and Regulations
Pool house construction in the Boise area requires permits and must comply with local building codes:
| Requirement | Details |
| Building Permit | Required for all pool houses with electrical, plumbing, or over a certain square footage |
| Setback Requirements | Pool houses must meet property line setbacks (typically 5-15 feet depending on jurisdiction) |
| Height Restrictions | Most residential zones limit accessory structures to 20-25 feet |
| Lot Coverage | Combined footprint of all structures cannot exceed the maximum lot coverage percentage |
| Permit Costs | $1,500 – $5,000 in Ada County; $1,000 – $3,500 in Canyon County |
If your pool house includes a kitchen and sleeping area, some jurisdictions may classify it as an ADU, which triggers additional requirements. We navigate these regulations as part of our planning process.
Property Value Impact
A quality pool house is one of the stronger outdoor living investments in the Boise real estate market. Here’s how different types affect property value:
| Pool House Type | Typical Cost | Estimated Value Added | ROI |
| Basic Changing Room | $30K – $60K | $20K – $45K | 50 – 75% |
| Cabana with Bathroom | $60K – $120K | $45K – $90K | 60 – 80% |
| Full Guest Suite | $120K – $250K | $90K – $175K | 65 – 80% |
| Entertainment Pavilion | $80K – $180K | $60K – $135K | 65 – 80% |
In premium neighborhoods across Eagle, north Boise, and parts of Star, a well-designed pool house can be the feature that sets your property apart. Buyers in the $600,000+ market increasingly expect polished outdoor living spaces, and homes with pool houses tend to sell faster and closer to asking price.
Frequently Asked Questions
How much does a basic pool house cost in Boise?
A basic pool house with changing room and storage space costs between $30,000 and $60,000 in the Boise area. These structures typically include a changing area, storage for pool equipment and furniture, and basic electrical for lighting. They don’t include plumbing or full bathroom facilities.
Does a pool house increase home value in Idaho?
Yes. A well-built pool house can increase your property value by $50,000 to $150,000 or more in the Boise market, particularly in neighborhoods in Eagle and north Boise where outdoor living is a major selling point. The ROI depends on the quality of construction and how well the pool house complements the overall property.
Do I need a permit to build a pool house in Ada County?
Yes, pool houses in Ada County require building permits. Any structure with plumbing, electrical, or that exceeds a certain square footage threshold requires full permitting and inspections. Expect permit fees of $1,500 to $5,000 depending on the size and complexity of the project.
How much does it cost to winterize a pool house in Idaho?
Winterizing a pool house for year-round use in Idaho adds $10,000 to $30,000 to the construction cost. This includes proper insulation, a dedicated HVAC system (mini-split heat pumps are most common), insulated windows, pipe insulation, and freeze-proof plumbing fixtures. These upgrades are essential for Idaho’s winters where temperatures regularly drop below freezing.
Can a pool house be used as a guest suite?
Absolutely. Full guest suite pool houses are one of the most popular configurations in the Treasure Valley. These include a bedroom or sleeping area, full bathroom, kitchenette, and living space. They range from $120,000 to $250,000+ and often function as a private retreat for guests, a rental unit, or a multigenerational living space.
How long does it take to build a pool house?
Pool house construction timelines in the Boise area typically range from 2 to 6 months depending on size and complexity. A basic changing room or cabana may take 8 to 12 weeks, while a full guest suite pool house with a kitchen can take 4 to 6 months. Design and permitting add 4 to 8 weeks before construction begins.
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A pool house is more than a building — it’s the centerpiece of your outdoor living experience. At Eliezer Custom Homes, we design and build custom pool houses that match the quality and character of your home while standing up to Idaho’s four-season climate.
Schedule a free consultation to discuss your pool house vision, get a detailed cost estimate, and see how we can bring your outdoor space to life.
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