The last ten per cent of a renovation is where projects stall

Everything below about snagging comes from what actually happens rather than from what is supposed to.

Why the end drags

The final stage is a long list of small items in different trades, each needing someone to return for an hour, which is the least efficient work on a project. By this point the builder has usually started the next job and the incentive to return is weak unless money is outstanding.

This is not usually bad faith; it is the economics of small return visits. Structuring the contract so a meaningful payment depends on completion is what aligns the incentives.

How to make a useful list

Go room by room in good daylight, look at every surface at eye level and then crouch and look along it, because defects show at grazing angles. Open and close every door, window, drawer and cupboard, run every tap, test every socket and switch, and check every light works on every control. Photograph each item and number it, because a written description of a mark on a wall is useless three weeks later.

A list produced this way is taken seriously; a vague complaint is not.

What is a defect and what is not

Cracks at junctions between different materials, shrinkage in new timber and small movement cracks after the first heating season are normal and expected. Doors sticking after a wet season, and gaps opening in timber during a dry one, are the building responding to humidity. A defect is work that does not meet the specification or normal standards, and distinguishing the two prevents unnecessary conflict.

Live with it a while and a good builder will explain which is which, and a written schedule agreed at the start avoids the argument entirely.

Some things only appear later

New plaster dries over weeks, new timber moves through its first year, and a heating system reveals problems only when it runs through a winter. This is why defects periods exist, commonly running six or twelve months after completion, during which the contractor returns to fix what emerges. Holding a small retention until the end of that period is standard on larger contracts and reasonable to ask about on smaller ones.

It also gives you an incentive to keep good records of when things were finished.

Handover information is part of the job

Certificates for electrical and gas work, warranties, appliance manuals, paint colours and codes, and as-built information all belong to you. Paint colour and product records in particular save real money the first time something needs touching up.

Photographs of open walls and floors, showing where services run, are the most valuable single item in that file. Ask for all of it before the final payment, because collecting it afterwards is much harder.

Anything structural belongs with a qualified professional, not an article.

Give it time before deciding it is wrong

A newly finished room looks different once furniture, textiles and use are in it, and judgements made on handover day are frequently reversed. Living with the space for a few months reveals which irritations are real and which were the shock of unfamiliarity. Leaving some decisions — storage, lighting positions, colour — until after that period usually produces better ones.

The project is not the end of the room; it is the point at which the room starts.

The takeaway

Hold back a payment until the list is done, photograph every item, and collect the certificates before the last invoice is paid.

The best rooms look like a decision, not a purchase.