Snagging Checklist for UK Homeowners

1. What snagging actually means

Snagging is the process of finding and fixing the small defects that always exist at the end of a building or renovation project, before you sign off and release the final payment. On a typical UK extension or refurbishment, expect 30–80 snags. Most are minor. Catching them now is far easier than fighting about them in six months.

2. When to snag

Walk round near practical completion, before final payment. Then again a few weeks later once paint has cured and timber has settled. Hold a small retention (or final payment) until the agreed snags are fixed.

3. How to walk through a room

Take your time, in daylight, with a torch and a notebook (or your phone). Look high, look low, and look from a couple of angles. Open and close every door, window, drawer and tap. Photograph each snag and number it.

4. Walls, ceilings and decoration

• Cracks at plaster joints, around openings and at ceiling lines
• Roller marks, missed patches, paint on sockets and frames
• Visible nail/screw heads, uneven filler
• Plumb walls and square corners

5. Floors

• Squeaks, deflection, level transitions between rooms
• Tile lippage, cracked grout, sealant tidiness
• Skirting joints, scribes around radiators and pipes

6. Doors and windows

• Even gaps around frames, smooth operation
• Latches engage, locks work, keys supplied
• Trickle vents open, draughts at seals
• Glass scratches, scuff marks, beads sitting flush

7. Kitchens and bathrooms

• Cabinet doors aligned, soft-close working, handles square
• Worktop joints, sealants, sink falls
• Taps fixed, no drips, hot/cold the right way round
• Showers run hot, no leaks at trays/screens
• Extractor fans run on the right switch

8. Electrics and services

• Every socket and switch works; faceplates square and clean
• Lights on the correct circuits, dimmers don't buzz
• Smoke/heat alarms tested and interlinked
• Boiler commissioned, radiators balanced, no air in system
• Electrical certificate, gas safety, building control sign-off

9. Outside

• Mortar joints clean, weep vents clear
• Gutters, downpipes, soakaways running properly
• Paths and patios falling away from the house
• Garden and driveway made good

10. Sign-off, paperwork and warranties

• Building control completion certificate
• Electrical Installation Certificate (EICR/EIC)
• Gas Safe / Benchmark book for boiler
• Manufacturer warranties (windows, boiler, appliances)
• Builder's workmanship guarantee in writing

Use a proper handover record

The Homeowner Renovation Prep Pack includes a printable snagging checklist, a handover record and a maintenance plan so nothing slips through the cracks between final payment and the first few months of living with the work. The free Builder Quote Checklist covers the front end of the project — what to check before you accept the quote.

The Builder's Brief UK provides practical homeowner guidance based on real trade experience. It is not legal, financial, architectural, structural engineering, planning or building-control advice, and is not a replacement for project-specific guidance from suitably qualified professionals.