Enter your site address and a few details. Our engine pulls the solar resource for your exact coordinates, builds the Part L 2021 baseline, works through the energy hierarchy — be lean, be clean, be green — sizes your solar array, calculates the carbon savings and writes the full professional report your planning application needs, charts and tables included.
The solar yield for your exact coordinates from the European Commission's PVGIS satellite dataset, your regional grid carbon intensity, heating degree days — and for London sites, the heat networks near you.
A Part L 2021 baseline for your exact floor areas, then Be Lean, Be Clean and Be Green savings computed stage by stage — with the carbon waterfall chart, demand tables and the percentage reduction councils look for.
Performance against your local target — including the London Plan 35% requirement and carbon offset calculation where they apply — plus fabric specifications, overheating strategy and draft planning conditions.
Full address, what you're building, floor areas, how you plan to heat it and roughly how much roof you have. No technical knowledge needed — sensible defaults cover the rest.
Live solar, grid and climate data is fetched for your exact location, the energy model runs the hierarchy, the charts are drawn and the full report is written and quality-polished automatically.
Your free report is ready in minutes — review every page, chart and table and download it immediately.
Householder schemes, single dwellings and small sites where the validation checklist asks for an energy statement or sustainable design and construction details — the most common reason applications stall.
Offices, retail, industrial and mixed-use schemes needing a Part L 2021 baseline, an energy hierarchy assessment and a renewables feasibility screen.
London sites get the 35% on-site target, heat network screening and the carbon offset calculation automatically; sites in councils with their own carbon targets pick the local requirement in the form.
Householder, minor and medium-scale applications across the UK — new dwellings, extensions, conversions, commercial and mixed-use schemes. The report provides the energy hierarchy assessment, carbon calculations and specification commitments local authorities ask for at planning stage. Detailed SAP/SBEM compliance modelling for Building Regulations is a separate later-stage exercise that builds on the commitments in this report.
Approved Document L (2021 edition) with SAP 10.2 carbon emission factors, the energy hierarchy methodology of national practice and the London Plan (Policies SI 2–SI 4 and the GLA Energy Assessment Guidance where the site is in London), Approved Document O for overheating, and the National Planning Policy Framework's climate change chapter — plus your council's own adopted policies, researched automatically for your site.
Live from official open datasets at the moment your report is created: the solar resource for your exact coordinates from the European Commission's PVGIS SARAH3 satellite dataset, your regional grid carbon intensity from the national Carbon Intensity API, heating degree days from the Copernicus ERA5 reanalysis, and — for London — the GLA's London Heat Map. Every source and access date is listed inside the report.
The report detects a London site automatically, applies the 35% on-site carbon reduction target beyond Part L 2021, screens heat networks near your site using the London Heat Map, and calculates the carbon offset contribution for any residual emissions at the GLA-recommended price — the number your borough will ask for in the section 106 agreement.