One API. 29 million properties. Built for developers, PropTech, finance, insurance, and AI teams.
Try it with any UK address. No signup. Real data.
Five audiences, one data foundation. Same API, same schema, same free tier — whether you ship code, mortgages, policies, or prompts.
One API key. 33 endpoints. JSON responses with EPC ratings, ownership records, and sold-price history across 29 million properties.
Learn more →Propalt normalises 8+ authoritative sources into a single consistent schema. Real-time property data — one integration, one invoice.
Learn more →Versioned endpoints, 24-hour refresh, and a full audit trail. Build automated valuation models you can actually defend in an audit.
Learn more →EPC fabric data, environmental risk scores, and comparable sales — all in one structured response. Price risk in seconds, not days.
Learn more →Our MCP server connects Propalt to AI assistants directly. Agents answer natural-language questions about any UK property — no code required.
Learn more →Same data, same key, same source-of-truth — three ways to consume it. Pick what fits your team.
33 endpoints across property, market, landlord, EPC, and planning data. Deterministic JSON. Authenticated with a single Bearer token.
The Propalt MCP Server gives Claude Code, Cursor, Windsurf, and any MCP-compatible client direct access to UK property data. Natural-language queries, structured answers, your existing API key.
Hosted, configurable workflows that turn Propalt's raw data into ready-to-deploy intelligence — landlord prospecting, valuation leads, area benchmarks, and AI assistants tuned for property questions.
Production-ready REST API. OpenAPI 3.1 spec. MCP-compatible. Use it from any language, any framework, any AI tool.
curl -X GET "https://api.propalt.ai/v1/property?uprn=100021888688" \ -H "Authorization: Bearer YOUR_API_KEY" \ -H "Accept: application/json"
import httpx
response = httpx.get(
"https://api.propalt.ai/v1/property",
params={"uprn": "100021888688"},
headers={"Authorization": "Bearer YOUR_API_KEY"},
)
data = response.json()
print(data["data"]["address"])const res = await fetch(
"https://api.propalt.ai/v1/property?uprn=100021888688",
{ headers: { Authorization: "Bearer YOUR_API_KEY" } }
)
const { data } = await res.json()
console.log(data.address){
"data": {
"uprn": "100021888688",
"postcode": "SW1A 2AA",
"address": "10 Downing Street, London",
"tenure": "Freehold",
"epc_rating": "D",
"last_sold_price": 4200000,
"last_sold_date": "2019-03-14"
}
}We normalise the canonical sources of UK property data into one consistent schema. No scraping. No estimates where verified data exists.
Ownership, transactions, title, sold-price history
29 million delivery points — the authoritative UK address file
Demographics, deprivation indices, and statistical boundaries
Energy performance certificates, fabric data, and improvement recommendations
Council tax banding, rateable values, and rental market data
Flood risk zones, environmental hazard signals
Corporate ownership, landlord portfolios, and director networks
UPRN master file, building footprints, and topographic boundaries
We do one thing: UK property data. Here's how we stack up against the alternatives — checked feature-by-feature against each competitor's current public site.
| Feature | Propalt AIUK property data · 2026 | PropertyDatapropertydata.co.uk | Homedatahomedata.co.uk | Street.co.ukdata.street.co.uk | Chimneychimney.com |
|---|---|---|---|---|---|
| Property coverage | 29M+ England & Wales | 25M properties | Partial | Listed only | Listed only |
| Data sources | 8 authoritative registers | 3–4 sources | 2–3 sources | 2 sources | 1–2 sources |
| API endpoints | 33 structured endpoints | 12 endpoints | 8 endpoints | 5 endpoints | 4 endpoints |
| AI / MCP ready | ✓ | ✗ | ✗ | ✗ | ✗ |
| OpenAPI 3.1 spec | ✓ | ◐ Partial | ✗ | ✗ | ✗ |
| Free tier | ✓ 500 credits/mo | ✗ | ✗ | ◐ Limited | ◐ Limited |
| Pricing | Transparent, usage-based | Quote-based | Quote-based | Subscription | Subscription |
| Refresh cadence | 24h across all sources | Weekly–monthly | Monthly | Weekly | Monthly |
| Landlord intelligence | ✓ | ◐ Partial | ✗ | ✗ | ✗ |
| EPC data | ✓ | ◐ Partial | ✗ | ✗ | ✗ |
| Sold prices | ✓ | ✓ | ◐ Partial | ✓ | ◐ Partial |
Last verified · 28 May 2026 · against each competitor's public website.
Tap any outcome to see the receipts — endpoints, metrics, and the kind of teams already shipping it.
One API key replaces a patchwork of Land Registry exports, EPC PDFs, and VOA downloads. One schema, one bill, zero joins.
Propensity-to-sell scores and landlord portfolio data let you find motivated vendors before they hit Rightmove.
Flood risk, EPC fabric, and planning history in a single API call. Build automated risk models that audit-trail every decision.
Our MCP server gives AI assistants 12 typed tools over real UK property data. No hallucinations. No stale context.
UK property data is fragmented across government registers, local authorities, and private feeds. Different schemas, different cadences, different identifiers. Propalt takes that off your roadmap.
UK property data lives across eight independent registers, each maintained by a different government body. HM Land Registry holds ownership and sold prices for England & Wales. Royal Mail PAF is the only authoritative address source — and licensed separately. EPC certificates are publicly downloadable but updated on different schedules per region. Companies House identifies corporate landlords. ONS publishes demographics at LSOA level. None of these systems share identifiers, schemas, or update cadences. Joining them — and keeping the join fresh — is a multi-quarter engineering project.
We resolve every property to a single canonical identifier and back-fill the same record with whatever each source contributes — ownership from Land Registry, EPC fabric from MHCLG, building footprint from Ordnance Survey, council tax band from VOA, corporate ownership chains from Companies House. The output is a deterministic JSON shape: same fields, same types, same nullability rules on every call. You write your code once.
Propalt replaced six different data integrations on day one. We shipped our valuation tool a quarter ahead of plan.
Bypass sales. Read the docs, try the API, ship in an afternoon.
Complete endpoint documentation with request/response schemas, authentication, rate limits, and interactive examples.
View API Docs →Get your first property lookup running in under 60 seconds. Covers authentication, your first API call, and reading the response.
See MCP Tools →Connect Propalt to Claude Code, Cursor, Windsurf, or any MCP-compatible AI assistant in three lines of config.
Explore Developer Portal →From API key to live property data in under a minute — we walk through authentication, your first endpoint call, and how to read the normalised response.
Automated valuation models fail audits for one reason: the data trail is opaque. Here's how versioned endpoints and source attribution change that.
Portfolio-size filters, renewal-cycle signals, and yield-gap alerts — five API queries that surface motivated landlords before your competitors do.
Book a 20-minute demo to see Propalt against your use case, or start building today with the free tier.