I've been scraping 241 UK council planning portals – 2.6M decisions so far
UK planning data is technically public. In practice it's locked behind 400+ different council portals, some still running bespoke ASP.NET that looks like it dates from 2004, some behind AWS WAF, all with subtly different schemas. I've spent four months scraping them. I'm now at 241 councils and 2.6 million decisions across England, Scotland and Wales.
The scraping problem
Most UK councils run one of a handful of portal systems, Idox being the most common. In theory this makes things easy. In practice every council has configured theirs differently, some block non-browser requests via TLS fingerprinting, some have rate limits that will get you banned inside 10 minutes, and a handful are running the aforementioned bespoke ASP.NET.
I ended up writing several scrapers: a standard requests-based one, a Playwright-based one for councils that block anything that doesn't look like a real browser, and a curl_cffi one for TLS fingerprinting. Some councils I still can't get. Liverpool's portal sits behind AWS WAF with a JavaScript challenge. I have a working Playwright-based scraper that solves the challenge once and reuses cookies, but the WAF rate-limits the IP after about 10 requests and then blocks me for a day. So I have 60k Liverpool decisions from an old scrape and no easy way to add more.
What I found
The approval rate stuff is what most people come for. Nationally it's around 88%, but it varies wildly by ward within a council, not just between councils.
The more interesting finding came from the time-to-decision data. Across 119 English and Welsh councils, 36.5% of home extension applications missed the statutory 8-week target in 2025, up from 27.9% in 2019. Guildford is the worst at scale: 66% of decisions over target, averaging 13.3 weeks.
What it is now
A postcode checker (free) and paid PDF reports (£19/£79). Zero paying customers so far, which is fine. I've been heads down on data quality and coverage.
Site is planninglens.co.uk if you want to poke around. AMA on the scraping side – that's where the interesting problems are.
1. Brilliant! Governments (and corps) treat public data like it’s theirs not ours. Information yearns to be free.
2. Having said that, you are likely violating T&Cs by scraping at all.
3. It is a lot easier to defend your position if you are making it free and public yourself.
4. But paying for food is nice
5. I suggest the business model here is providing architects and lawyers with strong evidence of prior planning decisions nationally
Most people applying for (difficult) planning have experience locally. But the planning system is a mess because it is not coherent nationally or regionally. The win here is not providing a copy of your data (that has legal issues) but providing pointers to decisions that support the case of the person paying you.
So I want to turn an old pub into tasteful housing and a cafe for the local village. The local planning team don’t like it, I could spend money bribing them and the councillors (see how much I understand British democracy) or I could get from you the fifteen pub to housing conversion decisions from around the country and use that to help my bribed councillors defend their u-turn
Everyone wins :-)