Part L Checker analyses your site photos like a senior UK Building Control Officer — so builders catch problems before submission, and send approved evidence straight to appb.co.uk.
Everything you need to capture, prove, and submit Part L evidence — without the back-and-forth.
Snap a junction photo on site and get a PASS / MARGINAL / FAIL verdict against Part L Appendix B in seconds — with specific fixes before you submit.
Every approved image is filed under its project and numbered plot, so your evidence is always where it should be.
Push one image or all ready images to appb.co.uk in a click, and track each one from sent to confirmed.
Three steps from site to submitted.
Take a photo of the thermal junction on your phone, right there on site.
Our AI Building Control Officer scores the photo and tells you what to fix if needed.
Approved images are sent to appb.co.uk and marked confirmed when they arrive.
Create your account, add a project, and run your first Part L check in minutes.