Property Data Insights

Mar 3, 2026 · 10 min read

UK House Price Growth by Postcode: Tracking Capital Appreciation via API

How to pull 1Y, 3Y, 5Y, and 10Y capital appreciation for any UK outcode — with Python code to rank postcodes by appreciation, time-adjust historic valuations, and calculate LTV movement for mortgage clients.

Feb 17, 2026 · 12 min read

How to Build an Automated Property Valuation (AVM) with the Homedata API

Build a production-ready AVM in Python or JavaScript: combine comparable sold prices, EPC floor area, and price growth trends to estimate any UK property's market value. Full code, confidence scoring, and API reference.

Building a School Finder: Ofsted Ratings + Distance from Any UK Postcode

Build a school finder that returns nearby schools sorted by Ofsted rating and distance — in under 30 lines. Covers primary, secondary, and special schools. Full Python and JavaScript examples using the Homedata Schools API.

Feb 3, 2026 · 9 min read

Jan 20, 2026 · 10 min read

Development 🏗️

How to Calculate Property Development Feasibility in the UK

A practical guide to GDV, profit on cost, and residual land value — with Python code to estimate end values from sold price comparables using the Homedata API.

How to Build a Rental Yield Calculator with the Homedata API

A practical tutorial: combine sold prices, rental comparables, EPC scores, and area trends to calculate gross and net rental yield for any UK property. Full Python and JavaScript code.

Jan 6, 2026 · 11 min

How Much Is My Council Tax? The Exact Formula (and Why Postcode Estimates Are Wrong)

Your council tax bill depends on your property's band and your local authority's Band D rate — not your postcode. Here's how to calculate the exact annual charge per property, and how to look it up programmatically via API.

Dec 22, 2025 · 9 min

Address Lookup Tutorial: Typeahead → Resolve → Enriched Property in Under 50 Lines

Build an address autocomplete with property enrichment using the Homedata API. From typeahead to bedrooms, EPC score, and comparable sales — in under 50 lines of Python or JavaScript.

Dec 8, 2025 · 8 min

What Is a UPRN? The Complete Guide to UK Property Reference Numbers

Everything developers need to know about UPRNs — what they are, where to find them, and how to use them to build property data applications.

Nov 24, 2025 · 8 min

EPC Ratings Explained: A Developer's Guide to Energy Performance Certificates

How EPC ratings work, what data they contain, and how to use EPC data programmatically via API for property applications.

Nov 10, 2025 · 10 min

UK Flood Risk Data Explained: NAFRA2, Risk Bands, and the EA Flood Risk API

What EA NAFRA2 flood risk data means, how the four risk bands work, and how to query flood risk for any UK property by UPRN.

Oct 27, 2025 · 9 min

Council Tax Bands API: VOA Data, Band Lookup, and Use Cases

How council tax bands are assigned, where the VOA data comes from, and how to look up bands programmatically for estate agents, proptech, and conveyancing tools.

Oct 13, 2025 · 7 min

Build an EPC Compliance Checker with Python and the Homedata API

A practical tutorial: check MEES compliance across a property portfolio using the EPC API. Includes a full Python script with CSV export and Band C stress-testing.

Sep 29, 2025 · 10 min