Boathouse Cost Guide for Minnesota Lakefront Properties
If you’re lucky enough to own property on a lake, such as Lake Minnetonka or nearby lake communities in Minnesota, you might be dreaming of a boathouse. In 2025, however, how much will a boathouse cost? Whether you’re planning a basic covered slip or a multi-story boathouse with storage and living quarters, this article explains all you need to know before you start building.
What is a Boathouse?
A boathouse is a type of shoreline building used to provide cover for watercraft such as jet skis and boats. In contrast to open docks, a boathouse offers weather shelter and frequently has additional conveniences like covered boat lifts.
- Equipment, paddles, and life jacket storage
- Living quarters or guest accommodation (in opulent designs)
- Second-level viewing platforms or lounges
- Outdoor decking and recreational areas
Boathouses in Minnesota are subject to municipal laws, particularly those pertaining to Lake Minnetonka, where environmental and zoning requirements greatly influence what is permitted.
Average Cost of a Boathouse in 2025
The price of a boathouse varies greatly depending on its location, size, design, and materials. This is a broad summary:
| Boathouse Type | Estimated Cost (2025) | Includes |
| Basic Covered Slip | $20,000 – $40,000 | Roofed dock, no walls, boat lift optional |
| Mid-Range Boathouse | $40,000 – $80,000 | Walls, boat lift, storage, partial decking |
| Custom Luxury Boathouse | $80,000 – $200,000+ | Multi-slip, upper deck, living quarters |
Pro Tip: In the Lake Minnetonka area, permits and design reviews can affect timelines and costs—so it’s wise to work with a local expert like TonkaBuilt to navigate this early on.
Key Factors That Affect Boathouse Cost
Type of Water (Lake Depth & Movement):
- Shallow, calm lakes: Easier foundation work, lower cost
- Deep or moving water: Requires specialized pilings or floating platforms, which adds to engineering costs
Decking Material:
The choice of decking and framing materials has a major impact on durability and maintenance.
| Material | Cost per sq. ft. | Pros | Cons |
| Pressure-Treated Wood | $15 – $25 | Affordable, easy to repair | Requires frequent sealing |
| Composite Decking | $30 – $45 | Low-maintenance, weather-resistant | Higher upfront cost |
| Aluminum | $40 – $60 | Durable, rust-resistant | Can get hot under sun |
Boat Lift System:
- Manual lift: $2,500 – $5,000
- Electric lift: $6,000 – $12,000
- Hydraulic or remote-controlled lift: $12,000+
Custom Features:
- Upper deck or sun lounge: +$10,000 – $25,000
- Enclosed storage rooms: +$5,000 – $10,000
- Built-in lighting and electrical: +$2,000 – $8,000
- Integrated dock: +$5,000 – $15,000 depending on size/material
Permitting and Local Regulations in Minnesota
The following should be taken into account before building:
- Shoreline setback laws
- Lake association approvals
- Regulations from the Department of Natural Resources (DNR)
- Footprint and height restrictions unique to Lake Minnetonka and other protected lakes
Saving time, money, and hassles, working with a local builder like Tonka Built guarantees compliance with all Minnesota-specific permitting requirements.
Seasonal and Long-Term Maintenance Costs
Once constructed, anticipate the following ongoing costs:
| Maintenance Item | Annual Cost Estimate |
| Lift & hoist inspection | $200 – $400 |
| Dock & deck refinishing | $300 – $1,000 (wood surfaces) |
| Ice damage repairs (if needed) | Varies – $1,000+ |
| Winter dock removal (if applicable) | $500 – $1,200 |
Despite their higher initial price, many Minnesota homeowners choose for composite and aluminum materials because they require less frequent maintenance.
Is a Boathouse Worth the Investment?
Yes, particularly for lakefront landowners who are creating a legacy property for future generations to enjoy and who wish to shield their boats from the heat, storms, and ice.
- Appreciate property appreciation—custom waterfront structures increase resale value
- Arrange to hold parties or entertain guests by the water.
In summary, a well-constructed boathouse is an addition to living rather than just a storage solution.
Why Choose Tonka Built for Your Boathouse Project?
TonkaBuilt understands the unique needs of Lake Minnetonka homeowners and Minnesota’s seasonal climate. Our services include:
- Custom design and 3D rendering
- Permit handling and shoreline compliance
- Premium decking and framing materials
- Seasonal maintenance and lift services
- Local craftsmanship with over 10 years of experience
Curious how much your dream boathouse would cost? Contact Tonka Built for a free consultation and customized estimate—we’ll walk you through your options and make the process stress-free from start to finish.