Anyone can call themselves a high-end builder. There’s no licence, no register, and nothing stopping a firm that fitted three kitchens last year from describing itself as a specialist in luxury construction.
Which leaves you working it out yourself, usually from a website and a quote. Here’s what actually tells you something.
High-end isn’t the same as expensive
Expensive is easy. Specify enough marble and any builder can produce a big number.
High-end is about what happens where things meet. The line where the floor meets the wall. Whether a door closes the same way in year three as it did on handover. Whether the joinery still fits when the heating has been on all winter and the timber has moved.
None of that shows in photographs, which is why photographs are the least useful thing on a builder’s website. The difference between a good finish and an excellent one is almost entirely in preparation and tolerances, and both are invisible by the time anyone takes a picture.
So the job is finding evidence of things you can’t see. That’s what the questions below are for.
Eight questions worth asking
1. Can I see something you finished three years ago?
Not last month. Anything looks good the week the protection comes off. You want to see how the work has aged — whether the plaster has cracked at the junctions, whether the doors still shut, whether the paint has held at the skirtings.
A builder who can arrange this has clients who are still happy three years later. That single fact tells you more than a portfolio.
2. Who will actually be on site?
Ask whether the trades are employed, long-term subcontractors, or found for the job. There’s nothing wrong with subcontracting — most quality firms do it — but you want the same carpenter and the same plasterer the firm has used for years, not whoever answered the phone.
Then ask who supervises them, and how often that person is on site.
3. What does your quote exclude?
The most revealing question on this list. Every quote has exclusions. An honest builder lists them; an optimistic one leaves them vague and calls them variations later.
If the answer is “nothing, it’s all included”, ask about the things that genuinely can’t be known yet — what’s under the floor, what state the existing drains are in, what happens if the structural engineer specifies more steel than assumed.
4. How do you price changes once we’ve started?
You will change something. Everyone does. What matters is whether the mechanism is agreed in advance — rates written down, changes quoted before the work happens, and nothing carried out on a verbal nod that appears on the final invoice.
5. What is the payment schedule tied to?
Stages of completed work, not dates in a calendar. Paying for progress is normal. Paying for time that has passed regardless of what got built is how people end up funding somebody else’s job.
Be wary of a large deposit. Materials need buying, so some money up front is reasonable, but it should relate to something specific.
6. Can I see your insurance certificates?
Public liability and, if they employ anyone, employers’ liability. Ask for the actual documents and check the dates. This takes a minute and almost nobody does it.
7. Who do I call when something’s wrong?
One name. Not an office, not a general number. On a job that runs three months you need a person who knows your project and picks up.
Ask how often you’ll hear from them without having to chase.
8. What happens after you leave?
Snagging is normal — small defects show up in the first weeks of the space being used. What matters is whether the builder comes back promptly and without argument. Ask what the process is and what’s covered in writing.
Paperwork that should exist before anyone starts
If these aren’t in place, the job hasn’t really started properly, whatever’s happening on site.
A written contract with a defined scope. A quote broken down rather than a single figure. Structural calculations from an engineer where any structure is being altered. Building control approval, which is separate from planning. Party wall notices served where the work affects a shared wall — two months’ notice for most jobs. Insurance certificates you’ve actually seen.
None of this is bureaucracy for its own sake — every item on that list exists because somebody once had a very expensive argument without it.
Warning signs
A quote well below the others. It rarely means someone found efficiencies. It usually means something has been left out, and you’ll meet it later as a variation when you have no leverage.
A large deposit in cash, or pressure to pay quickly to “hold a slot”.
No written contract, or a one-page quote presented as one.
Reluctance to give references or show completed work in person.
Pressure to decide now. Good builders are usually booked weeks ahead and don’t need an answer this afternoon.
A single price with no breakdown. You can’t compare it, you can’t check it, and neither can they when there’s a dispute.
Where to look
Word of mouth is still the best source, particularly from someone who had a difficult job rather than an easy one. Ask what went wrong and how the builder handled it — that’s the useful part.
Trade bodies help narrow the field. The Federation of Master Builders vets its members, and platforms like Checkatrade and TrustATrader carry out insurance and identity checks. Treat these as a filter rather than a recommendation.
Then look locally. A builder who works regularly in your area knows the housing stock, the council, and which streets have the drainage problems. Our guide to choosing a London builder goes into that in more detail.
How we work
Briefly, because this is a guide rather than a pitch.
We survey before we price, we list exclusions, and we tie payments to completed stages. You get one point of contact for the duration. We’ve been building across London for over 25 years, on full refurbishments and extensions, and a fair amount of our work comes from clients we finished for years ago.
If you want to see the standard rather than read about it, our page on high-end building in London covers what that involves.
Frequently Asked Questions
How do I know if a builder is genuinely high-end?
Look at completed work that’s a few years old rather than recent photographs, ask to speak to past clients, and check how the firm handles the parts you can’t see — preparation, tolerances, and what they do when something goes wrong. Anyone can produce a good photograph of a new kitchen.
What should I ask a builder before hiring them?
The most useful questions are what the quote excludes, how changes get priced once work has started, what payment is tied to, who will actually be on site, and whether you can see a job finished three years ago. The answers tell you more than any brochure.
How much deposit should a builder ask for?
Enough to cover materials being ordered, tied to something specific, and paid against a written contract. Be cautious about large upfront payments, cash requests, or pressure to pay quickly to secure a start date.
Should I always choose the cheapest quote?
No, and the cheapest quote is often the most expensive job. A price well below the others usually means work has been excluded rather than found more cheaply. Compare what’s included line by line before comparing totals.
Do I need a written contract for building work?
Yes. It should define the scope, the price, the payment stages, how variations are handled and what happens at completion. A quote is not a contract, and verbal agreements are where disputes come from.
What insurance should a builder have?
Public liability as a minimum, and employers’ liability if they employ anyone. Ask to see the certificates and check they’re current. It takes a minute and very few clients do it.
Still deciding?
If you’re comparing builders for a London project and want a second opinion on what you’ve been quoted, we’re happy to look at it. Sometimes the honest answer is that somebody else’s price is fair.
Call Force Builders Ltd on 077 6525 5189.
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