Snagging cost estimator
Turn your snag list into an indicative remediation-value range — useful when you're pushing a developer to complete the list before completion, or asking for compensation for what's left outstanding. It's a negotiation aid, not a bill: the developer is generally obliged to fix genuine snags under your warranty at no cost to you.
This is an information tool, not advice: figures are rough, indicative estimates, not quotes from a builder or surveyor.
Worked example: 3-bed house, 12 snags, mixed severity
A 3-bedroom new-build house with 12 items on the snag list — mostly cosmetic-to-moderate defects, not structural.
Indicative remediation value: £1,800 to £7,200 — worked out from a per-snag range of £150 to £600, nudged up slightly for a 3-bed house over the 2-bed baseline.
Change the inputs below to model your own numbers.
A smaller flat with fewer, more significant snags
A 2-bedroom new-build flat with 6 snags rated significant — things like a poorly-fitted door frame or a leaking pipe joint, not just cosmetic marks.
Even with a third of the snag count, the higher severity band gives a materially larger range: £3,000 to £9,000. Severity, not snag count, is usually what drives the total up.
Change the inputs below to model your own numbers.
Count every item on your snagging list, however small.
FAQ
Do I have to pay for these repairs myself?
No — genuine snags reported within your warranty's defects period (typically the first 2 years) are the developer's responsibility to fix at no cost to you. This estimate is a negotiation aid to show the scale of what's outstanding, not a bill you're expected to pay.
How is the estimate actually calculated?
We use rough industry-ballpark per-snag ranges by severity (cosmetic, mixed, significant), scaled up slightly for larger houses with more bedrooms, then multiplied by your snag count and rounded to the nearest £50. It's deliberately conservative and generic — real costs depend heavily on the specific trade and region.