The Best Home Renovations Builder in London? Here's How to Judge That Claim

Every builder in London will tell you they're the best. We're going to tell you the same thing, so you should be suspicious of us too. The difference is that we'll show you how to test the claim, because after six years of renovating houses across South East and South West London, most of the work we win comes from people who got burned by the last firm.

This post covers the problems that make finding a good renovation builder in London hard, what we changed about how we work because of them, and how to check any renovation company before you hand over a deposit. Including us.

Why finding a builder in London goes wrong so often

Around 480 people a month search "find a builder near me". A couple of hundred more search "reputable builders near me" and "trusted builders near me". Read those searches again: nobody types the word "trusted" unless they've stopped trusting. And one of the more popular builder searches in the UK is "top 10 worst house builders". People aren't researching builders. They're researching how not to get stung.

Here's what actually goes wrong, from the jobs we've taken over halfway through:

The quote that isn't a quote. You get one page with a round number and the phrase "subject to survey" doing an enormous amount of work. Three weeks in, the extras start. The floor was worse than expected. The wiring wasn't to regs. None of it was in writing, so none of it was ever in the price.

Day rates with no end date. A day rate sounds fair until you realise the person setting the pace is the person being paid by the day. We priced a job in Sydenham last year where the previous builder had been on site, on day rate, for seven months. It was a bathroom.

The disappearing act. Small firms juggle jobs. When a bigger job comes up, yours goes quiet. You find out your builder has gone when the plasterer stops answering the phone, because the plasterer was never employed by the builder anyway. He was a subcontractor three links down a chain you never saw.

Nobody owns the paperwork. Building Control sign-off, electrical certificates, party wall notices. On a proper renovation these aren't optional, and when no single person is responsible for them, they don't happen. We've opened up finished work to fix problems a Building Control inspector would have caught two years earlier, if anyone had booked one.

Reviews you can't check. Directory profiles are easy to fill with reviews and hard to verify. A builder with 200 five-star reviews and no company address should worry you more than a builder with 30 reviews and a registered office you can look up.

Why this makes us better at home renovation

Everything about how All Well Property Services works exists because of the list above. Not as a philosophy. As scar tissue.

A fixed price, in writing, before we start. We survey the property first, then give a written quote. The price we quote is the price you pay. If we lift the floor and find rotten joists, we price the repair in writing and you approve it before we carry on. No provisional sums, no TBC lines, no invoice surprises. On the housing stock we work in, 120-year-old terraces in Crystal Palace, Dulwich and Lewisham, surprises behind the walls are normal. Pricing them properly is the job.

One person runs your job, and it's the director. Richard runs projects personally, from the first survey to handover. One phone number for the whole build. When you ask a question on a Tuesday, you get an answer on the Tuesday, not a relayed message through three trades.

A programme with dates on it. You get a week-by-week schedule before work starts and photo updates as it runs. When a client in Sydenham asked to move a radiator halfway through her renovation, we priced the change, added a day to the programme, and she signed it off. That's the whole system: no change happens without a price and a date attached.

The paperwork is our problem. Building Control, NICEIC electrical certification, structural engineer's calculations, party wall notices where a shared wall is involved. We book them, chase them and hand you the certificates at the end. A renovation without sign-off is a problem you inherit at resale, so we treat the paperwork as part of the build, not an extra.

Is that "the best home renovations builder in London"? By the measures that wreck renovations, the ones above, we'd argue yes, and our Google reviews from clients across South London back the claim. But you shouldn't take our word for it, which brings us to the next section.

How to check a home renovation company in London (including us)

Whichever renovation companies you shortlist, run these checks. They take twenty minutes and they filter out most of the horror stories.

Look the company up on Companies House. You want a trading history, a registered address and accounts that get filed. Ask for the insurance certificate, not a promise that one exists. Public liability should be current and in the company's name.

Run all of that on us. We'll pass, and we'd rather win the job from someone who checked. Our guide to choosing a builder in London goes deeper on this, including the questions to ask before any money moves.

What a home renovation project manager actually does

Some London homeowners hire a standalone project manager on top of their builder, typically at 10 to 15 per cent of the build cost, to do the coordination the builder should be doing anyway. That tells you what the market thinks of builder-led management.

On our jobs the project management is built in. In practice that means sequencing the trades so the electrician finishes first fix before the plasterer closes the walls, booking Building Control inspections at the right stages rather than at the end, holding the programme when a materials delivery slips, and answering the two hundred small decisions a renovation generates: socket positions, door swings, tile layouts. Miss a week of those decisions and the job stalls; that's where day-rate builds go to die. If you want the detail, we've answered is renovation a project? properly on our renovation FAQ pages.

The takeaway

"Best builder in London" is a claim, not a fact, whoever says it. What you can verify: whether the price is fixed in writing, whether one accountable person runs the job, whether the programme has dates, whether the paperwork gets done, and whether the company stands up to twenty minutes of checking. Those five things decide how your renovation goes. The tiles don't.

We've built our whole firm around passing those five tests, across more than a hundred projects in South London since 2020. If you're planning a renovation anywhere from Crystal Palace to Clapham, book a free site visit. You'll get a survey, a fixed written quote, and a straight answer about whether the job is worth doing at all. The price we quote is the price you pay.