Ontario · Costs · 2026
What a septic quote should include — line by line
A one-number quote is not a quote; it is an opening position. Here is every line a complete Ontario septic replacement quote contains, what each one covers, and which missing line costs owners the most when it surfaces later as a change order.
The rule of thumb: a real quote names the system class, states the soil assumption it was priced on, and itemizes at least eight scopes. Anything vaguer is a number designed to win the job, not describe it.
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The part nobody tells you
Designers charge $800–$2,000 just for the paperwork in these quotes.
Ontario law lets you do that part yourself, on your own property. OntarioSepticDesigner.ca turns your answers into the same 26-page package the township clerk sees every day — calculations, drawings, forms, all of it.
The eight lines every complete quote has
1System class and size — named class, tank litres, bed length, and the T-time the sizing assumes
2Design and permit work — who produces the paperwork and files it, or an explicit exclusion (the $800–$2,000 line owners can take back for themselves)
3Excavation and disposal — the dig, the haul, and where the old bed material and tank go
4Materials — tank supplier, stone, pipe, fabric; spec named, not “materials incl.”
5Machine and labour — days on site, crew size
6Restoration — grading, topsoil, seed; the line most often silently missing
7Allowances and exclusions — rock, dewatering, imported sand: priced, capped, or excluded in writing
8HST and payment schedule — in or out, and when money moves
The three most expensive missing lines
| Missing line | How it comes back | Typical hit |
|---|---|---|
| Old-system disposal | “Contaminated material surcharge” after excavation opens | $2,000–$5,000 |
| Imported sand allowance | Test holes force a raised bed the quote never priced | $10,000–$20,000 |
| Restoration | Machine leaves; the yard stays a moonscape | $1,500–$4,000 |
Compare quotes on the same soil
Two quotes on different T-time assumptions are two prices for two different jobs. Before comparing anything, get all bidders pricing the same test-hole data — dig the holes first and hand every bidder the same log. That single move disciplines the whole table. Why quotes spread $15,000 apart is explained here.
The $18,950 line that never appears on a quote
A real worked example: 3-bedroom bungalow, conventional bed. Tank supplied and set, pipe, stone, fabric, one day of machine and labour, permit allowance — $13,049 with HST. The same job quoted at $32,000. The gap is design fees, markup, and labour you may not need to buy.
Two minutes on the free checker shows the numbers your own lot generates — daily flow, tank size, risk level — before anyone quotes you.
Walk in with your own baseline
The free 2-minute check turns your bedrooms, soil and water answers into a bed size and planning cost before any bidder arrives. Quotes stop being mysterious when you hold your own numbers — and the full cost tables show what a fair total looks like for every system class.
Quote questions, answered straight
Should a septic quote be itemized?
Yes. A complete quote names the system class, the soil assumption, and at least eight scopes. Lump-sum single numbers hide the lines that come back as change orders.
Is the permit included in a septic quote?
Sometimes — and it must say so either way. Design and permit work runs $800–$2,000 when bundled, and Ontario lets owners produce that package themselves instead.
What is an allowance in a septic quote?
A capped budget line for a known risk — rock removal, dewatering, imported sand. A quote with no allowances on a risky lot is not cheaper; it is just unpriced.
Does a septic quote include putting the yard back?
Only if the restoration line says so — grading, topsoil and seed are the most commonly omitted scope in Ontario septic quotes.
Get your numbers before their numbers
The free check gives you the bed size and planning cost for your lot in 2 minutes — the baseline every quote has to beat.