How Much Does It Cost to Build a Pool House?

Marwa Hasan
Written by Marwa Hasan
Updated December 27, 2021
A luxurious pool house behind a house’s swimming pool
Photo: Ursula Page / Adobe Stock


  • A small pool house (150 sq. ft. or smaller) starts at $26,000.

  • A mid-size or large pool house (300 sq. ft or larger) runs between $48,000 and $180,000.

  • You can personalize a pool house with built-in storage, showers, changing rooms, etc.

  • You can build a custom or a prefab pool house.

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A small detached pool house that is 150 square feet or smaller typically starts at around $26,0000, while a larger pool house of 300 square feet or more costs between $48,000 and $180,000 or an average of $114,000. A prefab structure of the same size can cost an average of $26,600

A pool house is a structure close to your pool that can serve as a functional space with a shower, changing room, and storage. After a fun day in your pool, it’s convenient to take a warm shower and change in a private setting before heading back to your house.

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How Much Does It Cost to Build a Pool House?

A pool and a pool house in a Californian home
Photo: Trinette Reed/Stocksy / Adobe Stock

The size of the pool house depends on the design and the features of the house. Once you figure out what you need, you can start designing the pool house.


A pool house bathroom lets swimmers quickly and conveniently use the restroom without tracking water inside your home.

Built-in Bar

A bar with a sink, fridge and beverage storage is a great way to entertain poolside guests. 


An outdoor shower is a pleasant way to rinse off after swimming. Pool house shower installation costs about $1,000, with a walk-in shower ranging between $750 and $7,000.


Built-in storage shelves and cabinets in a pool house can organize towels, pool noodles, and maintenance equipment.

Changing Rooms

Changing rooms that feature partitions, curtains and hooks eliminate the need for guests to enter your house.


Put a lounging area with a TV for guests to take a break from the pool.


You may want to attach a pergola for a covered relaxation area. On average, a pergola costs between $100 to $9,000, depending on the size and design. 

How Much Does It Cost to Build a Pool House per Square Foot?

A detached pool house costs between $160 and $600 per square foot to build. Adding things like storage, a bar or a kitchen increases the price.

How Much Does It Cost to Build a Pool House by Type?

Pool houses come in two different types, custom building or prefab building. The final cost depends on the type of building you choose.

Custom Pool House

When you build a custom pool house, you control all aspects of the design and construction. The custom pool house is built completely on the site from foundation to roofing. 

Custom-built pool houses cost between $26,600 and $180,000, or between $160 and $600 per square foot. 

Prefab Pool House

A prefab pool house is a pre-built portable construction made in a factory and ready to be installed in your yard. A prefab pool house starts at $5,000 to $6,000. The price can be as much as $25,000 or more for larger prefab pool houses. The cost of a prefab pool house will depend on size, material, and manufacturer.

While you might not be able to control the design of a prefab pool house, you'll save money and won't have to deal with a backyard construction project. 

Building a Pool House Cost Breakdown

After deciding on the pool house's features and design, it's time to consider other factors that will determine the final cost.


Expect to spend anywhere from $160 to $600 or more per square foot to build a detached pool house. A 300-square-foot pool house can cost $48,000 to $180,000 to build.


The cost for labor alone to build a pool house can run from $34,200 to $68,400.

Interior Finish

Many details make the interior finish of a pool house. 

Exterior finish

From the sheathing to the gutter installation, a lot makes up the exterior finish of a pool house. Asphalt shingle costs run between $3.50 and $5.50 per square foot for roofing. While water-proof vinyl siding will cost from $1 to $8 per square foot.

Cost of Building a Pool House Yourself

Building a new structure or house addition can be messy and time-consuming. Usually, it’s a complicated process for someone who doesn’t have the required skills. Even a prefab pool house will still need foundation and finishing work. 

From obtaining a building permit to framing walls and finishing the building, you can’t build your own pool house unless you are a licensed contractor, which will save you the labor cost of $34,200 to $68,400.

Ways You Can Save Money While Building a Pool House

When building a pool house, there are some ways you can reduce the cost:

  • A prefab house: Building a prefab pool house is so affordable than building a custom pool house.

  • Recycled building: Do you have an old shed or garage? Recycle the old buildings instead of building a pool house from scratch.  

  • Affordable materials: Using recycled or affordable building and finish materials will save you money on the total cost.

Building a Pool House FAQs

What other projects should I do at the same time?

While having builders in your backyard building the pool house, you can also work on a landscaping project in your backyard, such as upgrading the pool tiles. You can also build a pergola or home addition.

What’s the difference between a guest house, a pool house, and a shed?

  • Guesthouse: A small lodge close to the primary home to accommodate guests. It has to provide enough room for guests to live comfortably.

  • Pool house: Located near the pool to serve as storage, a lounging area, and a place for entertaining guests.

  • Shed: A small structure in the backyard used to store home equipment and garden tools, leaving the house and yard clean and uncluttered.

Is a pool house a good investment?

The main purpose of a pool house is to provide a convenient space to take showers, use the bathroom, or change in and out of swimsuits. It also provides a place to relax and entertain friends or family.

A pool house adds value to your home, making it an excellent long-term investment. 

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