Managing a Customer Snagging List

Quick Answer: Issue your own snagging list at practical completion, walk the property with the customer, agree the items in writing, and close each one with a dated sign-off. Use BS 8000:Part 0 tolerances as the technical standard for what is and isn't a defect. A 14-21 day target for snag close-out is industry norm; longer than 30 days from sign-off without resolution can trigger Consumer Rights Act 2015 s.56 price reduction rights.

Summary

Snagging is where small jobs become big jobs and good customer relationships die. A snagging list well-managed is closed within three weeks of practical completion with both parties signing off, the customer paying the retention or final invoice, and a Google review on the way. A snagging list badly managed grows in scope, drifts past 90 days, and turns into a Consumer Rights Act dispute.

This article covers the operational side: how to issue your own list first (you set the standard), how to triage customer items, how to use BS 8000 tolerances to push back on unreasonable claims, and how to close out efficiently. For the responding-by-letter side of snagging — formal written replies and the legal framework — see snagging letter.

The discipline is in being proactive. The tradesperson who walks the property at practical completion with their own checklist beats the tradesperson who waits to be told what's wrong. Snagging is yours to lead.

Key Facts

• Practical completion — the point at which work is substantially complete and the building/area is fit for use, even if minor snags remain. Triggers handover, defects liability period, and final payment cycle.
• Defects liability period (DLP) — typically 6-12 months from practical completion under JCT contracts; the period during which the contractor must return to fix defects.
• BS 8000-0:2014 — Workmanship on construction sites, Part 0: Introduction and general principles. Sets out tolerances by activity.
• BS 8000-7 — Workmanship on building sites — Glazing.
• BS 8000-11 — Workmanship on building sites — Wall and floor tiling.
• NHBC Standards — for new-build housing, the National House Building Council standards define acceptable tolerances; widely cited even for non-NHBC work.
• Snagging list categories: Cosmetic / Functional / Safety / Compliance. Different priority and timeline for each.
• 14-21 day standard close-out — industry norm for completing snags on a domestic job; 30+ days risks customer claiming Consumer Rights Act 2015 s.56 price reduction.
• Retention — typically 2.5-5% of contract value held until end of defects liability period (JCT 6 months for Minor Works).
• De minimis principle — minor cosmetic imperfections within tolerance are not "defects"; the customer is not entitled to perfection but to "reasonable care and skill" (CRA 2015 s.49).
• Latent vs patent defects — patent defects are visible at handover and should be snagged; latent defects emerge later and remain claimable for 6 years under simple contract or up to 12 years under deed.
• Independent snagging surveyors — increasingly common on larger residential jobs; expect a 20-100 item list at £350-£600 inspection cost.
• Email or app-based lists — provide an evidence trail; avoid hand-written lists on scraps of paper.
• Customer signature on closure — each item should be marked off with the date and customer initials when accepted as fixed.
• Two-strike rule — if you've returned twice to fix the same snag and it still isn't accepted, escalate: either bring in independent assessment, propose a price reduction, or formalise the dispute.

Quick Reference Table

Detailed Guidance

Issue your own snagging list first

The tradesperson who walks the job at practical completion with their own checklist and a pen anchors the entire close-out process. Before the customer creates their own list, you've already identified, listed, and (ideally) fixed the obvious items. The customer's list then becomes additions to yours, not a full audit you're defending against.

Your own snagging checklist by trade:

Bathroom installation:

• Silicone joints continuous, even, no gaps
• Tile grout lines straight, no missing grout, sealed at corners
• WC, basin, bath taps all tight, no drips after 24h
• Bath panel secure, gaps to wall consistent
• Shower screen seal continuous
• Extract fan running, vents clear, light operating
• Floor level, no rocking
• Skirting cut tight, sealed at floor
• Door swings clear, hinges aligned, lock operates
• Light switches and sockets level, plates flush

Kitchen installation:

• Cabinet doors all aligned, soft-close working
• Handles all level, same height across run
• Worktop joints flush, no lippage, sealed
• Sink tap tight, drainer flush to worktop
• Tile splashback grouted, sealed at worktop
• Plinths fitted, no gaps, vented if dishwasher/oven below
• Cooker hood ducting connected, fan operating
• All sockets switched, RCD protected
• Appliances tested, paperwork present
• Lighting all operational, dimmers tested

Electrical work:

• Test certificates issued (EIC or EICR)
• Earthing and bonding checked
• All circuits labelled at consumer unit
• Switches and sockets level, plates flush, screw heads level
• Cable routes captured behind plasterwork or chased neatly
• No exposed cable
• RCD test buttons tested with customer present

Plumbing/heating:

• Benchmark book issued for boiler
• Gas Safe / OFTEC notification submitted
• All radiators heating evenly, vented
• TRVs operational, all set to control position
• Pipework neat, clipped, no rattles
• No leaks at any joint after 24h commissioning
• System pressure correct
• Filling loop disconnected (combi) or accessible

Walk the property with this list. Fix any items you find. Sign off internally.

The practical completion walk-through

Schedule a formal walk-through with the customer for the day work finishes. Allow 60-90 minutes for a typical kitchen or bathroom. For larger jobs (extensions, refurbs), 2-3 hours.

Bring:

• Your snagging checklist
• Camera (phone)
• Notebook or app to capture items
• All certificates, warranties, instruction manuals
• Spare grout, silicone, paint matches for touch-ups

Walk room by room. Encourage the customer to point out anything they're not happy with. Treat every item seriously — even if you think it's within tolerance, write it down. You can address tolerance disputes in the written response, not on the spot.

At the end of the walk:

• Agree which items are snags and which are queries
• Agree a target date for snag close-out (typically 14 days)
• Confirm whether the customer is signing off practical completion
• Sign and date the snagging list, both parties

Use BS 8000 tolerances to push back

Customers (especially first-time buyers and those who've engaged a paid snagging surveyor) often raise items that are within tolerance. Knowing the standards lets you push back politely and professionally.

Common tolerances from BS 8000 series and NHBC Standards:

Polite pushback wording:

"I've looked at this item again. The variation here is around 2mm under a 2m straight edge, which is within the BS 8000-0 tolerance for plastered walls of ±3mm. I'm not able to make it perfectly flat — that's a property of plaster as a material. Happy to walk you through this on site if it helps."

This is honest, technical, and protects you. Customers who push past clear tolerance arguments are not acting in good faith and you should escalate per the complaint procedure (complaint handling procedure).

Triage the customer's list

Sort every item the customer raises into four categories:

Accept — clearly within scope and below acceptable standard. Fix it.

Accept with caveat — fix it, but note in writing that it's a goodwill response rather than a contractual obligation. Example: paint colour the customer chose looks different in their lighting — repaint at their cost in a new colour.

Query — investigate before responding. Example: customer says "this radiator is cold" — needs balancing check before agreeing.

Reject (with reason) — out of scope, within tolerance, or customer-induced. Write the reason against the item: "Within BS 8000 tolerance ±3mm" or "Item not within original scope of works (QT-0142)" or "Damage caused by furniture move after handover".

Your written response to the snagging list addresses each item with this classification. See snagging letter for the formal letter template.

The snagging list document

A good snagging list captures the following per item:

This format works on paper, in a shared spreadsheet (Google Sheets, Excel), or in a snagging app (Snagged, BuildPass, Procore, or the snagging feature in apps like squote.app). The customer should have a copy.

Close-out and final payment

Each snag is closed when:

• The work is done
• The customer signs/initials accepting it
• The date of closure is recorded

When all snags are closed:

• Issue a snag close-out certificate (a single page saying "all snags raised on [date] have been closed and signed off as of [date]")
• Request final payment (if not already paid)
• Release retention (if held)
• Send the warranty and certificate package
• Ask for the Google review (see asking for google reviews)

If the customer holds retention and refuses to release it after all snags are closed, send a formal demand referencing the contract and your final certificate, then follow the payment-chasing escalation in payment chasing templates.

When snags become a complaint

If a snag is contested, escalates in scope, or remains unresolved after 30 days, transition the matter from snagging to formal complaint handling. The trigger criteria:

• Customer rejects your remediation as inadequate after a second attempt
• Customer adds new items not present at practical completion
• Customer cites a Consumer Rights Act 2015 right (repeat performance, price reduction, or rejection)
• Customer threatens Trading Standards, court, review, or chargeback
• More than 30 calendar days have elapsed since practical completion without close-out

Move to the procedure in complaint handling procedure. The snagging list becomes part of the evidence file.

Independent snagging surveyors

On larger residential jobs (extensions, full refurbs, new builds), customers increasingly engage independent snagging surveyors. Typical findings include 30-100+ items in a single report.

How to handle:

• Don't be defensive — these reports are exhaustive by nature and most items are minor
• Triage as above (accept / accept with caveat / query / reject with reason)
• Respond in writing item-by-item — they expect a formal response
• For genuinely out-of-tolerance items, fix promptly
• For within-tolerance items, cite the standard
• Expect 20-40% of items to be rejectable on tolerance or scope grounds

The customer pays the surveyor (typically £350-£600) and may try to deduct this from your invoice. They cannot — the surveyor's fee is not your liability unless the original contract said so.

Retention and defects liability

Under JCT Minor Works Building Contract 2016, the standard practical completion regime is:

• 50% of retention released at practical completion
• Defects liability period: 6 months from practical completion
• Final 50% of retention released at end of DLP after final certificate

For smaller, non-JCT domestic jobs, retention is uncommon — typically the customer pays in full at practical completion with the implicit 12-month workmanship warranty. If you offer a workmanship guarantee (which most TrustMark members do), state the length explicitly in your T&Cs.

Frequently Asked Questions

What if the customer keeps adding to the list?

A clear written snagging list dated at practical completion is your reference document. Additions beyond that list are either (a) latent defects that genuinely emerged later — which are still within your warranty and you should fix, or (b) opportunism. Politely respond: "Items 1-12 were captured on the snagging list dated [date] and signed by both parties. New items raised after that date that are within warranty (12 months) I'll attend to under the warranty terms. Items outside scope or warranty I'd need to price separately."

Can the customer withhold payment because of snags?

Yes, but proportionately. Under the Consumer Rights Act 2015 and standard contract principles, the customer can withhold an amount reasonably proportionate to the cost of remedying outstanding defects — not the full contract value. For a £15,000 bathroom with £500 of snags, withholding £500-£1,000 is reasonable; withholding £15,000 is not. The Construction Act 1996 requires a "pay less notice" for construction contracts — see payment chasing templates.

What's the difference between snagging and defects?

At practical completion the term is "snags" — known minor items to be closed out. After practical completion, items that emerge are "defects" and fall under the defects liability period or the workmanship warranty. After the warranty expires, items remain claimable for 6 years under the Limitation Act 1980 s.5 but the customer must prove the defect existed at completion.

How do I respond to a paid snagging surveyor's report?

Treat it like any other snagging list, but respond in writing item-by-item. Use BS 8000 tolerances and NHBC Standards as your references. Expect inflated findings — surveyors are paid to find issues — but the underlying obligation under CRA 2015 s.49 is unchanged. Don't be intimidated by the volume; triage and respond professionally.

Can I refuse to come back for a single snag a year later?

Within the 12-month workmanship warranty, no — you must attend within a reasonable time. Outside warranty (and outside the 6-year Consumer Rights Act window for proven workmanship issues), yes, but most tradespeople choose to attend minor items as a goodwill gesture, since the reputational cost of refusing usually exceeds the cost of a half-hour visit.

Regulations & Standards

• Consumer Rights Act 2015 (s.49) — services performed with reasonable care and skill.

• Consumer Rights Act 2015 (s.55, s.56) — right to repeat performance, then price reduction.

• BS 8000-0:2014 — Workmanship on construction sites, Introduction and general principles.

• BS 8000-3:2020 — Workmanship on construction sites — Concrete, masonry and rendering.

• BS 8000-7:1990 — Workmanship on building sites — Glazing.

• BS 8000-11:2011 — Workmanship on building sites — Internal and external wall and floor tiling.

• NHBC Standards — Technical Standards for new homes, often cited even outside NHBC sites.

• JCT Minor Works Building Contract 2016 — defects liability period and final certificate procedure.

• Limitation Act 1980 (s.5, s.8) — 6-year limitation for simple contract; 12-year limitation under deed.

• Housing Grants, Construction and Regeneration Act 1996 — pay less notice regime for construction contracts.

• BSI: BS 8000 series — Workmanship on construction sites standards

• NHBC Standards — Technical Standards for new homes

• Consumer Rights Act 2015 (legislation.gov.uk) — primary legislation

• JCT Contracts — Minor Works Building Contract

• TrustMark Customer Charter — standards for registered firms

• snagging letter — Written response to snagging lists, formal letter framework

• complaint handling procedure — When snagging escalates to formal complaint

• project handover — Practical completion sign-off and handover documents

• payment chasing templates — Recovering retention or final payment