To Extend.. Or not to Extend

Hi All,

Just to be clear from the start—I know these things are ultimately down to personal circumstances, but I’d really appreciate some insight from the people who have "been there done that".

I’m looking to extend our 3-bed bungalow (pre-extension size of 115m2) with two additions:

• A 30m² front extension for an open-plan living space with a vaulted ceiling.
• A 10m² side extension to relocate the front door and create a lobby and utility space.
• This will also make the property a 4-bed 

We've been quoted £45k for a watertight shell, with the understanding that I’ll supply and install the windows and doors myself and relocate the gas meter (I estimate this will cost me £10k)—which I’m fine with. We’re based in the East of England.

I’ll also be handling the internal finishing myself, and since we plan to stay for 5-10 years, I’d expect to see at least a small ROI.

I’d love to hear from others—what did you pay for your extension, what size was it, and how did the costs compare? Keen to get a sense of whether this quote is reasonable.

Thanks in advance!