The lowest total may omit work included elsewhere. Compare line by line and ask each bidder to confirm exclusions in writing.
Create common categories
Compare shell, excavation, spoil, base, plumbing, equipment, electrical, barrier, deck, drainage, permits and restoration.
- Mark included, allowance or excluded
- Record brand/model
- Note quantities
Read allowances carefully
An allowance can transfer price risk to the owner. Ask what product and installation assumptions support it.
- Check taxes and delivery
- Ask about overage markup
- Confirm selection deadlines
Compare equipment performance
Pump size, filter area, heater output, controls, warranty and service network affect value.
- Avoid brand-only comparison
- Check electrical requirements
- Confirm commissioning
Protect payment and change control
Use milestone payments, written changes and clear acceptance criteria.
- No verbal extras
- Keep receipts
- Photograph progress
Safety and legal note: Have a qualified local professional review major contracts where appropriate.