Top 5 Mistakes to Avoid When Installing a Pool in Ontario

Adding a swimming pool to your backyard can transform your outdoor space into a relaxing retreat, but only if the installation is done right. In Ontario, where climate, building regulations, and landscape conditions vary widely, pool installation comes with unique challenges.

At Green Side Up Contracting, we’ve helped countless homeowners create stunning, long-lasting outdoor spaces across the Greater Toronto Area. We’ve also seen how common mistakes can turn a dream pool into a costly project. 

Here are the top five pitfalls to avoid when installing a pool in Ontario.

Related Article: How Long Does It Take to Install a Swimming Pool?

1. Skipping the Permits and Zoning Requirements

Before you break ground, you need to know what’s allowed on your property. Pool installation in Ontario is regulated by local bylaws and provincial codes. These rules cover:

• Setback distances from property lines and structures
• Fence and safety barrier requirements
• Electrical clearance
• Drainage and water management

What can go wrong:

• Fines or stop-work orders
• Required changes mid-project
• Delays in inspection and approval

How to avoid it: Work with a contractor who handles the permit process. At Green Side Up, we coordinate with local municipalities and ensure your design is fully compliant from day one.

Extra tip: Even if you think a permit isn’t needed, confirm in writing. Many homeowners assume small changes don’t require approval, only to be surprised later.

2. Choosing the Wrong Pool Type for Your Space

Not every backyard is suited to every kind of pool. Factors like soil type, slope, drainage, and size all influence what pool will perform best.

Common issues:

• Fiberglass pools are lifting due to high water tables
• In-ground concrete pools are cracking on unstable soil
• Oversized pools overwhelm small yards

Better approach: Have your site assessed by an experienced landscaper and builder. We evaluate your property conditions and help you choose a pool that looks good and functions well long term.

Design insight: Think beyond the pool: How will it fit into your overall backyard layout? Consider traffic flow, sun exposure, views from the house, and future upgrades.

3. Underestimating the Total Cost

The sticker price of the pool is just the beginning. Many homeowners focus solely on the base cost of the pool shell or system, overlooking all the essential components that turn a hole in the ground into a functional, beautiful, and safe backyard feature.

Hidden Costs That Add Up:

• Landscaping around the pool: Softscaping (plants, turf) and hardscaping (patios, retaining walls) are often left out of initial quotes but significantly influence usability and aesthetics.
• Decking, fencing, and lighting: Safety and design standards in Ontario require approved fencing and secure access points. LED lighting for ambiance and visibility adds value but also cost.
• Permits and inspections: These aren’t free, and permit fees can vary by municipality. Additional costs may arise from design adjustments or required changes after inspection.
• Utilities like gas and electrical: Connecting heaters, pumps, lighting, and automation systems usually requires licensed professionals, with material and labour charges that can’t be ignored.
• Safety features: Automatic pool covers, safety gates, and alarms are critical for families with children and pets, and they’re sometimes required by law.

The Consequences:

Without a comprehensive budget, projects may stall halfway or be rushed to completion without key features, compromising the final result.

What Green Side Up Recommends:

Get a detailed estimate that includes the full scope of work, not just the pool itself. We walk our clients through line-by-line budgets, offering options and upgrades transparently so you stay in control of your investment.

Pro Planning Tip:

Always add a 10–15% contingency buffer to your budget to absorb unexpected changes, such as finding unsuitable soil during excavation, or deciding mid-project to upgrade materials or finishes.

Budgeting smartly from the start allows you to enjoy your pool fully from day one without the stress of surprise expenses.

4. Ignoring Drainage and Water Management

Ontario’s freeze-thaw cycle and seasonal storms make drainage critical. Poor drainage leads to water pooling around your pool or even structural damage.

Risks:

• Soil erosion
• Pool shifting or cracking
• Water damage to nearby patios or foundations
• Ice buildup in winter causes surface cracks

Preventive measures:

• French drains or weeping tiles
• Proper grading of the surrounding soil
• Permeable pavers or stone features
• Strategic planting to absorb runoff

Green Side Up integrates these systems into your design to ensure water flows away from your pool and home.

Bonus tip: Don’t forget about managing water from your home’s downspouts. Divert runoff away from your pool area to maintain stable soil.

5. Hiring Unqualified or Inexperienced Contractors

The biggest mistake? Working with a company that cuts corners or doesn’t specialize in outdoor construction in Ontario.

Signs of trouble:

• No insurance or warranty
• Vague contracts
• Poor communication or missed deadlines

Why it matters: Improper installation can shorten your pool’s lifespan, create safety hazards, or lead to expensive repairs.

What to look for:

• Proven experience with Ontario climate and soil
• Workplace Safety and Insurance Board coverage and liability insurance
• Transparent timelines and written guarantees

Green Side Up Contracting is known for professionalism, craftsmanship, and honest communication. Our award-winning team treats every backyard like our own.

Additional note: Ask for references and visit past projects. A reputable builder will be happy to show off their work and let you speak with satisfied clients.

Related Article: Top 5 Swimming Pool Water Features You Need

More Tips for a Successful Pool Build

Even with the big mistakes avoided, there are a few smaller decisions that can significantly improve your experience and outcome:

• Plan for shade and seating. Add pergolas, umbrellas, or built-in benches to make your space usable during hot Ontario summers.
• Think about storage. Pool equipment, toys, and maintenance tools need a clean, dry place.
• Choose energy-efficient equipment. Variable-speed pumps and LED lighting reduce long-term operating costs.
• Prep for winterization. Pools in Ontario must be closed properly before winter. Plan for the necessary covers, chemicals, and closing services.

Related Article: Why Hire Professional Swimming Pool Contractors

Do It Right the First Time

Installing a pool is a major investment in your home and your lifestyle. Avoiding these five common mistakes will save you time, money, and stress. It’s not just about having a pool; it’s about having the right pool, installed the right way, by the right team.Thinking about adding a pool to your Ontario backyard? Contact Green Side Up today to book a consultation and get expert advice from start to finish.