If you’re planning a home extension in the UK, I hope these tips from our 12-month renovation help you prepare for what’s really ahead.

If you’ve ever watched a home renovation programme and thought that looks stressful… well, you’re absolutely right. We’re now 12 months into our extension project (originally meant to be 180 days—ha!), and while I wouldn’t change the outcome for the world, there are definitely a few things I wish I’d known before we started.

From unexpected surprises (hello, hidden chimney!) to budget blowouts and family chaos, it’s been a rollercoaster. If you’re planning an extension of your own, here are 10 lessons I’ve learned the hard way. Hopefully, they’ll save you a little stress, money, and maybe even a few arguments along the way!