How to Build an Indoor Pool: A Complete Step-by-Step Guide

Building an indoor pool is a complex process that requires careful coordination of planning, materials, and construction skills. If you’re considering this kind of project, working with a custom pool builder can help you manage the many moving parts, like space evaluation, permits, structural design, drainage, plumbing, and finishing details. This guide outlines the key stages of the indoor pool building process, so you know what to expect and how to prepare for each step.

Planning and Permits

Thorough planning and proper permits are essential before starting construction. Begin by assessing the available space and determining the pool’s size, depth, and shape. Consider optional features like a spa area or sauna if space allows.

Detailed blueprints must be created to address plumbing, ventilation, and structural requirements. Professionals should review these plans to confirm they align with local building codes and safety regulations.

Permit approvals typically include construction, plumbing, and electrical clearances, all of which must be secured before excavation begins. Completing this step properly helps avoid costly delays and ensures everything is done to code.

Design and Layout

Designing the layout involves balancing visual appeal with functionality. The location of the pool inside your home must be chosen carefully to support the required ventilation, moisture control, and access. Decide on dimensions that suit your lifestyle, whether you want a lap pool, a recreational pool, or a shallow area for relaxing.

Material choices will also impact both performance and appearance. A well-thought-out layout should also include proper drainage systems to manage humidity and water runoff. Ensuring ease of movement around the pool and planning for features like a seating area or adjacent storage will contribute to the overall usability of the space.

Excavation and Foundation

Once your design and permits are approved, the building process begins with excavation. Clearing the designated area is the first step, followed by marking the exact shape and size of the pool. The depth and slope must match the plan closely to avoid later adjustments.

After excavation, the base must be leveled and compacted to provide support for the structure. Proper drainage systems are installed at this stage to handle water efficiently and protect the foundation.

Then, a concrete base is poured to serve as the core support structure for the pool. This layer must be even, strong, and free from cracks to ensure a long-lasting installation.

Plumbing and Electrical Work

Plumbing and electrical systems are installed before the pool shell is completed. Water flow, drainage, heating, and filtration all rely on a correctly designed plumbing setup. The pipes should be corrosion-resistant and arranged to minimize friction and maximize efficiency.

At the same time, electrical work is carried out to power lighting, filtration equipment, heaters, and control systems. All components must be weather-sealed and installed in compliance with safety codes. To reduce the risk of issues later, plumbing and electrical lines should be kept separate and tested during installation. This part of the process is best handled by licensed professionals who can ensure safe and reliable operation.

Construction and Finishing Touches

The structural shell of the pool is completed after the underground systems are in place. Materials like concrete or gunite are used to form the body of the pool, which must be carefully shaped and cured.

Waterproof tiles are applied with precision to both protect the surface and enhance the appearance. Decking is added next, using slip-resistant materials that provide a clean finish and comfortable walking area.

Lighting is strategically placed to enhance safety and ambiance, both underwater and around the perimeter. A strong filtration system is installed to maintain water clarity. Once all components are in place, a final inspection confirms that the pool meets design expectations and safety standards.

Maintenance and Upkeep

Routine maintenance is key to keeping your indoor pool in working condition. Regular cleaning helps prevent the buildup of dirt and algae, especially in areas with less circulation. Maintaining balanced water chemistry ensures the pool remains safe for use and protects the internal systems.

Testing should be done frequently, and adjustments made as needed for pH, alkalinity, and sanitizer levels. Equipment like pumps, filters, and heaters should be inspected regularly to identify any signs of wear or malfunction.

Cleaning or replacing filters on a set schedule will support better performance. Annual professional servicing is also recommended to address potential issues early and keep the pool running smoothly year-round.

Related Topics:

• How to Build a Cocktail Pool: Design and Construction Tips

• How to Design a Swimming Pool