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How many quotes should you get for construction?

4 min read
Oct '25 • by Heather

Quick summary

Get at least three quotes from different contractors to understand the reasonable price range for your project, which might vary from around £44,000 to over £134,000 for a rear extension in London. Avoid choosing based solely on price; check what’s included, the timeframe, and references to ensure quality and value.

Home design? Sorted.
Planning permission? Nailed it.
Building regulations? Don’t even worry about it.

It looks like you’re all ready to go into construction, there’s just one problem: you don’t have a builder. But how long can it take to find the right one?

This stage is worth taking your time on to make sure you've approached enough contractors that you're satisfied with who you choose in the long run.

So, how can you avoid this? Follow this advice from our Connect team…

How many quotes should you be getting from potential builders?

We recommend 3

By having at least 3 contractors, ideally from different sized companies, you’re giving yourself enough scope to get an accurate idea of what is reasonable for your project. It should let you paint a picture of what the average price might be and whether or not one contractor is offering dramatically more or less.

For instance, if you’re creating a rear extension in London, you might see quotes for…

  • £80,000
  • £75,000
  • £134,000

or you might see...

  • £75,000
  • £68,000
  • £44,000

In each of these cases, two of these quotes are pretty evenly matched, but one stands out. One is very cheap and one very expensive.

Quotes that come up a lot higher could be from a larger construction company. Though the price might be off-putting, these kind of businesses do typically tend to offer more security, so it might be worth asking what the money gets you. And then there's the cheap quote. Before you sign on the dotted line, do your research and find out just what it includes.

How much does an architect charge?