Why now
The UK has more than 150,000 households a year obtaining permission to alter their homes, tens of thousands trying to build one, and a cost environment that makes a static quote out of date within months.
householder planning decisions in England in the year to March 2026 — 90% granted
MHCLG planning statistics, Jan–Mar 2026
people on Right to Build registers in England, while serviced-plot permissions fell 18% in a year
MHCLG self-build data release, Sept 2025
median UK renovation spend in 2024, up 26% on the year; 83% funded from savings
Houzz UK 2025 study
construction materials prices year on year; structural steel +17.7%
DBT building materials statistics, July 2026
of SME builders hit by skills shortages; 49% delaying jobs
FMB State of Trade, H2 2025
of UK homeowners regret early renovation decisions
Tapi survey, Aug 2026
Help to Build shut to new applications on 31 March 2025 — there is no live public affordability product for self-builders
Homes England
Future Homes and Buildings Standard in force: a self-builder designing now completes under new rules
HCWS1445
What this means for a household
Costs move faster than a build. Trades are scarce, so sequencing matters. Rules change mid-project. And the money is overwhelmingly the household's own savings, released over years. A plan that can't be re-simulated as those things change isn't a plan.