How our service works
We publish price guidance and, if you ask, put you in touch with a builder. We do not design, make or install extensions. This page sets out what happens after you press the button.
After you ask for a quote
You send three things. A postcode, four answers about the extension (what the room is for, a rough size, whether a crane can reach, when you want it) and a way to contact you.
We look for a builder. One that makes modular extensions and takes work where you live. That usually takes a working day.
We tell you who it is. By phone or email. If you are happy, we pass your request on. If not, it goes no further and you can ask us to delete it.
The builder prices the job. They visit, look at the ground, the drains and the street, and give you a figure in writing. Any contract is between you and them.
Who pays
The builder pays us a fee for the introduction. You pay us nothing, whether you go ahead or not, and the fee is not added to your price by us.
What we do not do
- Ask you for money or a deposit.
- Share what you send with anyone before you agree, or with any firm other than the one we named to you.
- Give you a price for your house. Only a builder who has seen it can.
- Put you on a mailing list.
We have no connection with any extension company whose name resembles this site's.
About the figures here
The prices on this site are typical national ranges gathered from UK price guides published in 2026. Planning fees and the rules on planning, building regulations, party walls and VAT come from GOV.UK and the Scottish Government. Use them to set a budget. A builder's written price for your house replaces them, and the planning notes are general guidance rather than legal advice.
Contact
Email support@grubleads.com. To have what you sent us removed, see the privacy page.
Get a quote for your extension
A guide figure only goes so far. Tell us where the house is and what you want built, and a builder can price the real thing.
Your pick:
This site is a free introduction service, not a builder. We look for a firm that builds modular extensions where you live and tell you its name. Your details go to that firm only once you say yes.
Thank you. We have your request.
- We look for a builder that makes this kind of extension and works in your postcode, then ring or email you with its name.
- Nothing is passed on unless you tell us to go ahead.
- The builder visits, looks at the ground and the street, and gives you a price in writing. We never send marketing.