How an inground pool actually gets built.
Reviewed by the GTA Pool Contractors editorial teamLast reviewed How we research
The sequence
Each stage waits on the one before it.
A pool is not built in parallel. That is why a two-week permit delay in April becomes a July swim date, and why the checks below are worth making while the work is still visible.
- 01
Feasibility and design
A survey of the yard: setbacks, grades, access for machines, where the equipment pad can live and how the deck will meet the house. The design is drawn from those constraints, not from a catalogue.
Does the layout clear your municipality's setbacks and leave room for the enclosure?
- 02
Permit application
Drawings, site plan and the enclosure detail go to the municipality. Timelines depend on the local queue, and no excavation should start before the permit is issued.
Is the permit posted, and is the number on your contract?
- 03
Locates and site preparation
Utility locates are booked and marked, the access route is agreed, and fencing, tree protection and a staging area protect the rest of the property.
Are the locate marks visible before the excavator arrives?
- 04
Excavation
The hole is dug to the design profile and the spoil is hauled away or stockpiled where agreed. Rock and groundwater are the two variables that change both scope and price.
Is the hole measured against the plan before shell work begins?
- 05
Shell
Concrete is sprayed over a steel cage, wall panels and a floor are set for a liner, or a manufactured shell is craned into place on a prepared base.
Walls straight, depth correct, plumbing stubs where the drawing puts them.
- 06
Plumbing and electrical rough-in
Skimmers, main drain, returns, light niches and conduit are installed and bonded, then pressure-tested while they are still accessible.
Did you see the pressure test hold before anything was covered?
- 07
Inspections
Municipal building and enclosure inspections, plus electrical and gas where they apply. Each one has to pass before the work it covers disappears under finishes.
Are the passed inspections recorded, not just promised?
- 08
Finishes
Plaster or pebble is applied and cured on a schedule that includes when the pool gets filled, or the liner is fitted and the coping and waterline tile are set.
For plaster, is the fill time in writing? For a liner, are there wrinkles or gaps at the seams?
- 09
Decking, equipment and start-up
Interlock or stone, the pump, filter, heater and controls, final grading and restoration, then water, chemistry and a walkthrough of the equipment with you.
Do the installed model numbers match the contract, and is balancing included?
What moves the date
Delay is usually decided before the dig.
Ask every builder what they do when one of these lands mid-build. The good answer names the person who calls you, and how the schedule is reissued.
None of this is a reason to accept a vague timeline. It is the reason a timeline should have dates and contingencies attached.
- Permit queue and inspection availability
- Weather — rain during excavation, frost under a shell
- Rock, groundwater or unstable soil
- Material lead times on liners, shells, stone and equipment
- Change orders agreed mid-build
- Access: a machine that cannot reach the yard without a crane or a neighbour's driveway
Next
Then check who is holding the shovel.
The sequence is predictable. The contractor is the variable — insurance, WSIB, permits, subcontractors and a written schedule are what you are actually buying.
Get three local quotes before the crews book out.
Tell us the service and your city. We pass the job to up to three technicians who actually cover your street — no call centre, no obligation.