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NewUK address autocomplete API

UK Property & Land APIs

Every UK property API you need.
One Integration.

Valuations, sold prices, EPCs, demographics, deprivation, connectivity, planning constraints, ownership and title. REST JSON from propertyinsights.co.uk/api/v1, authenticated with a single API key.

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Start a 14-day free trial with 500 test API credits. API key auth, OpenAPI spec included.

30.2Msold price records since 1995
29.1MEPC certificates
4.3M+company-owned property records
46available APIs
GET/api/v1/property/valuation?postcode=S11+8YH&address=10+Example+Road
200 OKapplication/json
  "success" true  "data"    "valuation"      "recommended"        "value" 245000        "method" "Comparables"        "confidence" 78            "range" "low" 230000 "mid" 245000 "high" 260000         "epc" "currentEnergyRating" "D"
Estimated £245,000Confidence 78EPC D

Example response excerpts from the Valuation, Council Tax and Area Sold Prices APIs. Fictional addresses and illustrative values.

What we believe

Good property data is only half the job.

The experience around the data matters too. You should be able to integrate quickly, understand every call and see exactly where your credits are going.

01

More than rows and fields

Useful documentation, clear responses and the tools to understand production behaviour are part of the product, not extras.

02

No long lock-ins

Change plan or cancel without a harsh contract or a drawn-out exit. We want you to stay because the service earns its place.

03

Built for developers

One API key, OpenAPI documentation, predictable JSON and practical examples help you move from sign-up to a working request quickly.

04

Every call is traceable

Inspect the endpoint, source, status, credits, latency, request parameters and stored response details for each API call.

05

Quality improves over time

Request evidence helps us find inconsistencies in public sources and improve matching, validation and fallbacks as patterns emerge.

06

Usage stays visible

Transparent burn charts show actual credit use against your billing cycle, so there are no surprises at the end of the month.

Developer workspace
Illustrative dashboard data
Calls this cycle1,842Across 11 endpoints
Error rate1.7%31 of 1,842 calls
Average latency238msP95 684ms
Credits remaining31,580On track this cycle
API quality

Reliability by day

This cycle
150100500
2xx success4xx client5xx server
Credit burndown

50,000 credit cycle

On track
Used18,420
Actual remaining31,580
Actual remainingTarget pace
Request history

Open any call and see what happened

req_7F2A91
/api/v1/property/valuationpostcode=ZZ1 1ZZ · address=14 Example Lane
API key200GET238ms8 credits
Request parameters
{
  "postcode": "ZZ1 1ZZ",
  "address": "14 Example Lane"
}
Response summary
{
  "success": true,
  "confidence": 78,
  "creditsCharged": 8
}
Response body
{
  "data": {
    "valuation": "£245,000"
  }
}

Stored audit data is size-limited and credentials are redacted.

Developers first

Make your first API calls in minutes

This example showcases the Property Valuation API, using a fictional address and illustrative response values that match the documented response structure.

  • API key auth. One key for all endpoints, sent in the
    x-api-key header.
  • Transparent Credit Usage Most API calls cost 1 credit, manage your balance via your developer portal.
  • Continually Updated All data is refreshed and automatically kept up to date with no effort required from you.
Property Valuation API example
curl "https://propertyinsights.co.uk/api/v1/property/valuation?postcode=S11%208YH&address=10%20Example%20Road" \
  -H "x-api-key: YOUR_API_KEY"
Example response excerpt · 200 OK

  "success": true,
  "data": {
    "valuation": {
      "recommended": { "value": 245000, "method": "Comparables", "confidence": 78 },
      "range": { "low": 230000, "mid": 245000, "high": 260000 }
    }
  }

Data coverage

One key, 46 APIs

All the property data you could need, sourced across government and multiple organisations in one easy to use implementation.

New Address capture

Address autocomplete for forms that need to move.

Help customers find a Great Britain address in a few keystrokes, then return structured fields, its UPRN and coordinates.

Free suggestions35 creditsMonthly credit plans
Explore the address autocomplete API

Property Analysis API

Deep dive comparison data including sold prices, crime rates, council tax bands, and comprehensive market intelligence.

GET · API reference

Property Valuation API

Automated property valuation using HPI and comparable sales methods with confidence scoring.

GET · API reference

Property Boundary API

Resolve a UPRN, HM Land Registry title number, and INSPIRE boundary geometry for an address in England or Wales.

GET · API reference

Property Due Diligence API

Prioritised enquiry prompts from open screening data with optional OS property context.

GET · API reference

Flood Risk Screening API

River, sea, surface-water, reservoir and English coastal-risk screening from free official mapping.

GET · API reference

Ground Risk Screening API

Coal-mining matches, nearby recorded landslides and BGS 1:50,000 geological context.

GET · API reference

Environmental Risk Screening API

Flood, radon, noise, landfill, coal mining, invasive plants, current air and groundwater-protection factors with explicit data status.

GET · API reference

UPRN to Address API

Look up a canonical Great Britain address from a UPRN, or match an address and postcode to its UPRN.

GET · API reference

Property Profile API

Create a concise property profile with identity, title, tenure, property facts, Council Tax and review enquiries.

POST · API reference

Land Registry & Title API

Match HM Land Registry titles, check document availability, purchase official copies and extract register text.

POST / GET · API reference

Property Information Pack API

Generate a private, customer-branded PDF combining property, valuation, market, EPC, council tax, ownership, crime, schools and finance data.

POST / GET · API reference

Renovation Uplift Calculator

Calculate adjusted property values with extensions, renovations, and quality uplift scenarios.

GET · API reference

Stamp Duty Calculator

Instant, accurate logic for 2026 UK Stamp Duty Land Tax, including additional dwelling surcharges.

POST · API reference

Council Tax Search

Postcode, property, and billing-authority council tax lookup across England, Scotland, and Wales with tax-year support.

GET · API reference

EPC Certificate Data

Retrieve current Energe Performance Certificates (EPC) data, ratings, and recommendations.

GET · API reference

Crime Statistics

Hyper-local crime data aggregated by postcode, including outcome status and crime types.

GET · API reference

Corporate Ownership

Access 4.3M+ records of UK properties owned by UK and overseas companies.

GET · API reference

Sold Comparables

Find comparable sales nearby with enrichment data like price per sq ft and bedroom counts.

GET · API reference

Sold Prices History

Historical transaction data filtered by location, property type, and date range.

GET · API reference

Area Sold Prices

Complete sold price history for any UK postcode area with filtering, pagination, and street-level search.

GET · API reference

Area Analytics

Aggregated intelligence on demographics, transport, and amenities for any postcode sector.

GET · API reference

Deprivation API

English deprivation scores, ranks, deciles, domain breakdowns, and local authority context for a postcode.

GET · API reference

Demographics API

Combined Census 2021 age, household, tenure, bedroom, ethnicity, religion, qualification, and occupation data.

GET · API reference

Liveability API

Neighbourhood liveability scores with safety, social, amenity, school, crime, and Census context.

GET · API reference

Broadband Availability API

Aggregated Ofcom broadband availability, coverage, and predicted speed data for a postcode.

GET · API reference

Mobile Coverage API

Aggregated Ofcom signal scores and technology availability for EE, Vodafone, Three, and O2.

GET · API reference

Planning Constraints API

Known listed building, conservation area, Article 4, and tree preservation constraints near a location.

GET · API reference

Schools & Education

Detailed performance data, catchment info, and Ofsted ratings for 51k+ UK schools.

GET · API reference

House Price Index

Official UK HPI data for tracking market trends at regional and national levels.

GET · API reference

Internal Area Size API

Access detailed internal floorspace measurements and area data for UK properties.

GET · API reference

Mortgage Rates API

Live tracking of UK mortgage rates with Bank of England data across all LTV bands.

GET · API reference

Bank Rate API

Monitor current and historical bank interest rates from major UK financial institutions.

GET · API reference

Inflation Rate API

UK Consumer Price Index (CPI) inflation data with monthly readings and historical trends from 1989.

GET · API reference

Who builds on it

Built for all sorts of teams

Proptech & portals

Enrich every listing with valuation, sold history and EPC data at page-load speed instead of maintaining your own Land Registry pipeline.

valuationsold-pricesepc

Lenders & insurers

Pre-fill applications and run desktop checks with a confidence-scored AVM, ownership records and area risk signals in one call chain.

valuationownershipcrime

Surveyors & estate agents

Pull comparables, EPC history, title records and nearby planning constraints for appraisals and reports without leaving your own tools.

sold-pricesplanningepc

AI builders

Give agents real UK property facts as tools. Connect over MCP or ChatGPT Actions and every endpoint becomes a callable function.

mcpall 46 APIs

Agent ready

Property data your AI can call as tools

Our MCP server exposes all endpoints as typed tools, and a ChatGPT Actions integration does the same for GPTs. Point an agent at UK property and it gets facts, not guesses.

  • Typed tools, strict JSON. Every endpoint has an OpenAPI schema, so agents get structured facts and clean tool selection, not free-text guesses.
  • UK-first coverage. Sold prices, EPCs, demographics, deprivation, broadband, mobile coverage, planning constraints, ownership and title from public and primary national sources.
  • One key, three surfaces. The same API key works across the REST API, the MCP server and ChatGPT Actions.
Read the MCP docs →Set up ChatGPT Actions →
mcp.propertyinsights.co.uk
# Claude Code
claude mcp add property-insights \
  https://mcp.propertyinsights.co.uk

# Then, in any session:
> "What did terraced houses on Bentinck Road
   in Nottingham sell for since 2020?"
Claude DesktopClaude CodeCursorChatGPT Actions

How it works

From sign-up to first response

Create an account

Sign up and start a 14-day free trial with 500 test API credits, so you can start building straight away.

Get your API key

Your key is on the dashboard the moment you sign in. Send it in the x-api-key header on every request.

x-api-key: YOUR_API_KEY

Make a call

Any endpoint, any HTTP client. Structured JSON comes back ready to use.

curl propertyinsights.co.uk/api/v1/epc/search?postcode=S11+8YL

Questions

Asked before you got here

How accurate are the valuations?

Every estimate combines House Price Index and comparable-sales methods, and comes with a confidence score from 0 to 100 (under data.valuation.recommended.confidence) plus a low, mid and high range. High-turnover streets score higher; unusual properties score lower, and we tell you rather than hiding it. Use the score to decide when to show the figure and when to ask for a survey.

What are the rate limits?

Limits are per plan and returned on successful responses in X-RateLimit-Limit, X-RateLimit-Remaining and X-RateLimit-Reset headers. If you exceed them you get a 429 with the reset time in the response, never a silent failure. Higher limits are a plan change, not a negotiation.

Where does the data come from?

Primary national and public sources: HM Land Registry, the domestic EPC register, Police.uk, the Department for Education and Ofsted, Companies House, the Valuation Office Agency, the Bank of England, ONS Census and inflation data, Ofcom, and planning.data.gov.uk. Each endpoint documents its source, coverage and important limitations.

Can I use it from Claude, Cursor or ChatGPT?

Yes. Add the MCP server at mcp.propertyinsights.co.uk to Claude Desktop, Claude Code or Cursor and all 46 APIs are available as typed tools. For GPTs, install the ChatGPT Actions integration. Both authenticate with the same API key (x-api-key) as the REST API.

Is there a free trial?

Yes: a 14-day free trial with 500 test API credits, meant for building and testing. A card is required to start the trial. Move to a paid plan when you go to production.

What does coverage look like across the UK?

Coverage varies by source. Sold prices and EPC certificates cover England and Wales, Ofcom connectivity data covers available UK postcodes, and deprivation and planning constraints currently cover England. Planning source coverage is incomplete, so an empty result does not prove that no constraint applies. Each API response and guide makes its coverage clear.

Start with one address

Sign up, take your key from the dashboard and make your first call in the next few minutes. Free while you build.

Get your API key View the API reference