Propalt AI is our product, and this comparison recommends it for the general multi-attribute case. We have included our own weak points, named the jobs where a competitor is the better choice, and linked every figure to the provider's own published page so you can check it. Read it as an informed argument rather than an independent audit.
The UK property data market has split into groups that are easy to confuse: address lookup APIs, investment analytics dashboards, report products, and multi-attribute property APIs. They are priced differently, licensed differently, and built for different jobs. Picking the wrong one usually shows up late, when a data type you assumed was included turns out to sit behind a higher tier or a separate product.
For building on several property attributes at once, Propalt AI and Homedata are the two credible multi-attribute options, both from £49 a month with a free tier and MCP access. Choose a specialist when the job is narrow: Ideal Postcodes for address lookup and validation, PropertyData for investment analytics, Searchland for land and planning research, Street Data for listing feeds, Sprift for client-ready reports. Coverage outside England and Wales is patchy across the whole market, so test a Scottish or Northern Irish postcode before you assume UK coverage.
This guide compares the main options on the four things that decide fit: what data they cover, how they charge, how fresh the data is, and whether you can get your data back out. The last one is the question buyers skip and later regret.
What changed in the UK property data market by 2026
The underlying data is largely public. Land Registry Price Paid, the MHCLG EPC register, Environment Agency flood data and Ordnance Survey UPRN references are all open. What providers sell is the aggregation layer: matching those sources to a single property identifier, normalising them, and serving them as reliable JSON at scale. That is real work, and it is where providers differ.
Two shifts matter this year. AI agents now consume this data directly, so machine-readable delivery and MCP access have moved from a nice-to-have to a selection criterion. Three of the seven providers below now publish MCP access. And data portability has become a live procurement question rather than a legal footnote, so how a provider treats export and contract length now belongs in the comparison rather than the small print.
The main UK property data APIs in 2026
Each provider below is listed with what it is best for, where it is weaker, and the pricing published on its own site as of 1 August 2026. Weak points are stated for every provider, including ours.
Propalt AI
Best for: teams and AI builders that need several property attributes from one API on a month-to-month contract.
Coverage runs to 36 endpoints across 11 categories, exposing more than 150 property data attributes: valuations, ownership and tenure, listings and listing history, rental data, landlord and portfolio tracking, EPC and building fabric, environmental risk, planning, comparables and market analytics. It is built on 8 official UK registers, including HM Land Registry, the MHCLG EPC register, the Valuation Office Agency, HMRC and Companies House, plus Propalt's own listings, sales, rental and landlord datasets, across 29 million England and Wales addresses.
Refresh runs on the cadence of each source. Land Registry, Companies House, listings, sales and rentals update daily, with Land Registry transactions appearing 48 to 72 hours after registration. Royal Mail PAF and the EPC register update weekly, ONS, HMRC and VOA monthly, Ordnance Survey quarterly.
Delivery is a single-key REST API with MCP server access on every plan including the free tier, plus an OpenAPI 3.1 spec, an llms.txt index and Markdown output, so it works inside Claude, ChatGPT and Cursor without glue code. Published performance is a p50 response time of 84ms and 99.98 percent uptime, with a 99.9 percent SLA from the Platform tier and 99.95 percent at Growth.
The free tier is 500 credits a month with no card. Paid plans are month-to-month with no contract: £49 Developer for 5,000 credits, £199 Startup for 25,000, £499 Agency for 100,000, £1,299 Platform for 300,000, £2,999 Growth for 750,000, then custom Enterprise. Overage on paid tiers is charged at £0.005 per excess credit. Bulk export to CSV or Parquet is available from the Agency tier upward. Built on 8 official UK registers with published pricing.
Weaker points: full attribute coverage is England and Wales. Scotland is partial, limited to sold prices, EPC ratings, planning applications and the sales pipeline, and Northern Ireland is largely uncovered. Bulk export is gated to Agency and above, so on the £49 and £199 plans you have month-to-month billing but not bulk export. Credits are weighted, so comparables cost 12 credits a call and market listings 6, which means you should model your endpoint mix rather than your call count. Unused credits do not roll over.
Homedata
Best for: developers who want broad multi-attribute coverage with a free tier to prototype on.
Publishes 29 million UK properties identified by UPRN, with around 22 million carrying EPC data and sold price history for England and Wales back to 1995. Data types span property characteristics, prices and transactions, EPC, area intelligence, agent and market data, environmental risk, around 27,000 schools with Ofsted ratings, planning applications across 417 local planning authorities, and listing events. Delivery is REST JSON with a published Claude and Cursor MCP option.
Free tier of 100 calls a month with no card. Paid plans run £49 for 2,000 calls, £149 for 10,000, £349 for 50,000 and £699 for 250,000 a month, working out at 2.45p down to 0.28p per call. Calls are weighted: address find costs 2, address retrieve 5, Land Registry confirmed sales 5, and comparables 10. Support is community only on Free and Starter, 48 hour email at Growth and 24 hour priority email above that.
Weaker points: nation-level coverage is stated differently in different places, with sold prices given as England and Wales and the market activity feed described as whole of UK at 90 percent plus coverage, so confirm coverage for the specific data types you need. Export and contract terms are not published on the pricing page, so ask before you commit. Tier steps are wide, so a workflow needing 90,000 calls buys the 250,000 plan. On multi-attribute coverage this is the closest like-for-like alternative to Propalt AI in this comparison.
Street Data
Best for: estate agents and portals that need live listing data and per-property enrichment with no subscription.
Covers more than 150 property data points on all 29 million England and Wales properties, updated daily. Delivery is REST, with £50 of free credit on signup and strictly pay as you go pricing at three tiers: £0.02 per property for basic details, £0.10 for the core record, and £0.50 for premium, which adds machine learning outputs such as estimated sale and rental values and propensity to sell.
Weaker points: per-property pricing is simple to model and gets expensive at volume, particularly on the premium tier. Coverage is England and Wales, with Scotland explicitly excluded. No MCP option is published. Export terms, rate limits and uptime commitments are not published.
Sprift
Best for: estate agents and conveyancers who want a client-ready, white-labelled property report rather than raw endpoints.
Publishes more than 300 data points on over 30 million UK residential properties, drawn from sources including Royal Mail, Land Registry, Ordnance Survey, ONS, Environment Agency and Historic England. The product set is dashboards, reports, a comparables engine, prospecting and market intelligence tools, with a natural language interface. API access is offered as raw data plus Sprift's own insights delivered into your systems, via REST or tailored data packages.
Weaker points: the API is secondary to the report and dashboard products, so it is a heavier commitment for a pure data feed. No pricing, tier structure or export terms are published anywhere on the site, which makes it impossible to model before a sales conversation.
PropertyData
Best for: investors and the software that serves them, with a lean toward yields, growth and area level market analytics.
Publishes 69 or more interoperable endpoints across 13 categories, drawn from 24 or more sources including Land Registry, Ordnance Survey, Royal Mail, the VOA and MHCLG. It offers ChatGPT access and an MCP connection for Claude Code and Cursor, currently marked beta, plus OpenAPI and Markdown docs for AI. The stated aim is coverage of all four UK nations, with coverage varying by dataset. Refresh varies by type: listings near real time, Land Registry sold prices and titles monthly on release, EPC monthly.
The web app starts at £14 a month. API plans are credit based, from £28 a month for 2,000 credits, through £96 for 15,000 and £192 for 50,000, up to £1,300 for 500,000, with a 14 day trial capped at 500 credits. Annual billing gives 12 months for the price of 11. Rate limits run from 4 requests per 10 seconds on entry plans to 24 on the highest tier.
Weaker points: the centre of gravity is investment analytics and the dashboard, so per-property attribute depth varies by endpoint. Per-endpoint credit costs are not published on the pricing page, so you cannot model a workflow cost without asking. Check the specific endpoints you need rather than the endpoint count.
Searchland
Best for: developers, land teams and surveyors researching sites, planning and ownership through a visual map.
Strong on planning applications and ownership data. It is primarily a SaaS platform rather than an API-first product. Pricing is £195 per seat a month on annual billing for the Standard plan, with Pro and MAX priced on request. All subscriptions carry a 12 month minimum. Free trials are available after a demo. API access is included on MAX and available on request on lower tiers.
Weaker points: a 12 month minimum term, no self-serve free tier, and it is built as a dashboard first. Export terms are not published. If you need a data feed rather than a research tool, this is the wrong shape.
Ideal Postcodes
Best for: address lookup and postcode validation, and nothing beyond that.
Royal Mail PAF and Ordnance Survey address data via a clean REST API, with UPRN and rooftop geocodes included on every lookup. Pricing is pay as you go with no subscription, from £0.045 per lookup on a 200 credit bundle down to £0.028 on a 32,100 credit bundle. Credits are a one-off purchase valid for 12 months. There are 50 free credits to start, with a one month trial and no card required. Support is 24/5 by phone, chat and email.
Weaker points: it does not cover property attributes, EPC, prices or risk. No uptime SLA is published on the pricing page. If address validation is all you need, this is cheaper than every multi-attribute option here and you should stop reading.
UK property data API comparison: pricing and terms
Every figure in this table was captured from the provider's own published pricing and terms pages on 1 August 2026. We recheck them quarterly and date the page when we do.
| Provider | Free tier | Entry pricing | Export and contract |
|---|---|---|---|
| Propalt AI | 500 credits/mo, no card | £49/mo (5,000 credits) | CSV/Parquet export from Agency (£499). No contract on any tier. |
| Homedata | 100 calls/mo, no card | £49/mo (2,000 calls) | Not published |
| Street Data | £50 signup credit | £0.02 to £0.50 per property | Pay as you go. Export not published. |
| Sprift | Demo only | Not published | Not published |
| PropertyData | 14 day trial, 500 credits | £28/mo (2,000 credits) | Annual option at 11 months' cost. Export not published. |
| Searchland | Trial after a demo | £195/seat/mo, annual billing | 12 month minimum |
| Ideal Postcodes | 50 free credits, 1 month trial | £0.028 to £0.045 per lookup | Pay as you go, credits valid 12 months |
"Not published" means we checked the provider's public pricing and terms pages on 1 August 2026 and could not find a stated position. It is not a claim that terms are unfavourable.
UK property data API comparison: coverage and delivery
Coverage, delivery and refresh figures were captured from each provider's published product and documentation pages on 1 August 2026.
| Provider | Coverage focus | Delivery | Freshness |
|---|---|---|---|
| Propalt AI | Multi-attribute, 36 endpoints, 150+ attributes. England and Wales (29M), partial Scotland | REST + MCP on every plan + OpenAPI 3.1 + Markdown | Daily on Land Registry, listings, sales, rentals. Weekly to quarterly on other registers |
| Homedata | Multi-attribute, 29M UPRNs, 8 data categories | REST + MCP | Not published |
| Street Data | Listings and enrichment, 150+ points, England and Wales (29M) | REST | Daily |
| Sprift | Curated residential reports, 300+ points, 30M UK | Report and dashboard product + REST API | Not published |
| PropertyData | Investment analytics, 69+ endpoints, 24+ sources | Web app + REST + MCP (beta) | Near real time to monthly by source |
| Searchland | Planning, land, ownership | SaaS + API on MAX or on request | Not published |
| Ideal Postcodes | Address and postcode only (PAF and OS) | REST | PAF release cycle |
Rate limits, uptime and support
Technical buyers evaluate on operational limits as much as on coverage, and most providers do not publish them. Here is what is on the public pages as of 1 August 2026.
| Provider | Rate limit | Uptime | Support |
|---|---|---|---|
| Propalt AI | 50 req/sec from Developer, 500 req/sec from Agency | 99.98% published, 99.9% SLA from Platform, 99.95% at Growth | None on Free and Developer, email from Startup, priority from Platform |
| Homedata | 2/sec Free, rising to 40/sec at £699 | Not published | Community on Free and Starter, 48h email at Growth, 24h priority above |
| PropertyData | 4 to 24 requests per 10 seconds by plan | Not published | Not published on pricing page |
| Street Data | Not published | Not published | Not published |
| Sprift | Not published | Not published | Not published |
| Searchland | Not published | Not published | Not published |
| Ideal Postcodes | Not published | Not published | 24/5 phone, chat and email |
Which UK property data API is best in 2026?
For the common job of building on several property attributes at once, Propalt AI is the strongest fit in this comparison. Three specifics, each checkable in the tables above.
Breadth from one integration. Valuations, ownership, tenure, listings and listing history, rental data, landlord and portfolio tracking, EPC and building fabric, environmental risk, planning, comparables and market analytics come from a single API built on 8 official registers plus Propalt's own market data. Landlord and portfolio tracking is the least commonly available of these, and we did not find it published by any other provider in this comparison when we checked on 1 August 2026.
AI delivery on every tier. MCP ships on all plans including the free tier, alongside an OpenAPI 3.1 spec, an llms.txt index and Markdown output. Homedata publishes an MCP option and PropertyData publishes one in beta. The difference is that Propalt does not gate it behind a paid plan.
Published terms. Month-to-month billing with no contract on every tier, published pricing rather than pricing on application, published rate limits and uptime, and CSV or Parquet export from the Agency tier upward. Below Agency you get the contract flexibility but not bulk export, which is worth knowing before you build on the £49 plan.
The right property data API is the one whose data you can still use after you stop paying for it.
This is not a claim to win every job, and the boundaries are real. If all you need is address validation, Ideal Postcodes is cheaper and enough. If you want investor-style yield and growth analysis, PropertyData is more specialised. If your work is site sourcing across planning and land, Searchland's map is purpose-built. If you need one call per property with no subscription, Street Data's pay as you go model is simpler than ours. If you want a client-ready report rather than endpoints, Sprift is built for that. Homedata is a credible like-for-like alternative on multi-attribute coverage, with its own free tier, and on a comparables-heavy workflow at volume its published call weights work out cheaper than our published credit weights. If its endpoint mix fits your workflow better than ours, take it.
What if you need Scotland or Northern Ireland?
Coverage outside England and Wales is the largest open gap in this market, and it is worth being direct about.
The reason is structural. Sold price data for England and Wales comes from HM Land Registry. Scotland runs on Registers of Scotland, which licenses differently and publishes on its own cycle. Northern Ireland is served by Land and Property Services, separate again. Aggregating all three into one consistent schema is a data engineering problem rather than a coverage checkbox, which is why most providers start with England and Wales.
Where the providers in this comparison stand as of 1 August 2026: Propalt AI publishes partial Scottish coverage, limited to sold prices, EPC ratings, planning applications and the sales pipeline, with Northern Ireland largely uncovered. PropertyData states an aim to cover all four UK nations with coverage varying by dataset. Homedata publishes 29 million UK properties by UPRN but gives sold price history as England and Wales. Street Data excludes Scotland explicitly. Sprift states 30 million UK properties without a nation-level breakdown.
If you operate across the UK, do not take "UK coverage" at face value in either direction. Test a postcode from each nation, on the specific data types you need, during any trial.
How to choose between them
Five checks, in this order, before you commit to any provider.
- Coverage against your real use case. List the exact data types you need and confirm each is on the tier you would actually buy, not a higher one.
- True cost per useful call. Account for credit weighting and per-lookup pricing. A find then retrieve workflow, or a high-compute endpoint, can cost several units rather than one.
- Freshness that matches the decision. Listing-driven work needs daily or better. Valuation and planning can tolerate slower cycles.
- Delivery that matches your stack. REST for classic integrations, MCP if you are building with AI agents.
- Data ownership and exit. Can you export everything in a usable format, on the tier you are buying, and switch away without a penalty?
Run these across the tables above. For the general multi-attribute case, Propalt AI clears all five with one qualification: bulk export sits on Agency and above. The specialists each concede at least one check by design, which is the correct trade when your job is genuinely narrow.
The companion guide, How to Choose a UK Property Data API, works through each check in detail, including a worked cost model for one property record across three providers, and the questions to put to any vendor.
Frequently asked questions
What is the best UK property data API in 2026?
For most builders needing several property attributes from one integration, Propalt AI and Homedata are the two credible options, both from £49 a month with a free tier and MCP access. Propalt AI publishes a wider set of data types, including landlord and portfolio tracking, and publishes its export, contract, rate limit and uptime terms. Choose a specialist instead if your need is narrow: Ideal Postcodes for address lookup, PropertyData for investment analytics, or Searchland for land and planning research.
Which UK property data APIs have a free tier?
Propalt AI offers 500 credits a month with no card and MCP included. Homedata offers 100 calls a month with no card. Ideal Postcodes gives 50 free credits with a one month trial, and Street Data gives £50 of signup credit. PropertyData offers a 14 day trial capped at 500 credits. Sprift and Searchland offer demos and trials arranged with their teams rather than self-serve free tiers.
How much does a UK property data API cost?
Entry pricing as of August 2026 ranges from pay as you go, with Ideal Postcodes at £0.028 to £0.045 per lookup and Street Data at £0.02 to £0.50 per property, through subscription, with PropertyData's API from £28 a month and Propalt AI and Homedata from £49 a month, to seat-based SaaS, with Searchland at £195 per seat a month on annual billing. Model your call or credit weights rather than the headline price, because a single enrichment workflow can consume several units per property.
Which property data API works with AI agents and MCP?
Propalt AI, Homedata and PropertyData all publish MCP access for tools such as Claude, ChatGPT and Cursor, with PropertyData's marked beta as of August 2026. Propalt AI includes MCP on every plan including the free tier, and ships an OpenAPI 3.1 spec, an llms.txt index and Markdown output for LLMs.
Which UK property data APIs cover Scotland?
None of the providers in this comparison offers full property-attribute coverage for Scotland, and Northern Ireland is thinner again. Propalt AI publishes partial Scottish coverage on sold prices, EPC, planning applications and the sales pipeline. PropertyData states an aim to cover all four nations, with coverage varying by dataset. Street Data excludes Scotland. The cause is structural: England and Wales run on HM Land Registry, Scotland on Registers of Scotland, and Northern Ireland on Land and Property Services, each licensing separately. Test a postcode from each nation you operate in during any trial.
Can you export your data from a UK property data API?
It varies, and most providers do not publish a position. Propalt AI offers bulk CSV or Parquet export from the Agency tier (£499 a month) upward, with month-to-month billing and no contract on every tier. Searchland runs a 12 month minimum term. For the remaining providers in this comparison, export terms were not published as of 1 August 2026, so ask before you sign.
Try Propalt AI free
Propalt AI returns valuations, ownership, listings, rental history, EPC and building fabric, tenure, environmental risk, planning and comparables across 29 million England and Wales addresses, from 8 official registers plus Propalt's own market data. The free tier is 500 credits a month with MCP access included and no credit card, so you can test it inside Claude or ChatGPT in minutes.
Start free at propalt.ai, or read the data sources and pricing first. Building a product on it? See the PropTech use case: one API in place of several data contracts.
Sources and data references
All competitor pricing and coverage checked on 1 August 2026 against the provider's own published pages. Competitor links are nofollow.
- Propalt AI (August 2026). Product overview and data sources. 36 endpoints, 150+ attributes, 29M England and Wales addresses, 8 official registers plus proprietary data, REST and MCP, OpenAPI 3.1, p50 84ms, 99.98% uptime. propalt.ai/product/overview and propalt.ai/product/dataSources
- Propalt AI (August 2026). Pricing. Free 500 credits a month, £49 to £2,999 a month plus Enterprise, no contract, per-endpoint credit weights, overage at £0.005 per credit, CSV and Parquet export from Agency. propalt.ai/pricing
- Homedata (August 2026). API pricing and coverage. Plans £49 to £699 a month, free tier 100 calls, weighted calls, 29M UPRNs, MCP for Claude and Cursor. homedata.co.uk/pricing
- PropertyData (August 2026). API overview and pricing. 69+ endpoints, 24+ sources, API from £28 a month, ChatGPT and MCP beta. propertydata.co.uk/api and propertydata.co.uk/api/pricing
- Searchland (August 2026). Pricing. £195 per seat a month, annual billing, 12 month minimum, API on MAX. searchland.co.uk/pricing
- Ideal Postcodes (August 2026). Pricing. £0.028 to £0.045 per lookup, PAF and OS based, 50 free credits. ideal-postcodes.co.uk/pricing
- Street Data (August 2026). Pricing and coverage. 150+ data points, 29M England and Wales, £50 signup credit, £0.02 to £0.50 per property, daily updates. data.street.co.uk/pricing
- Sprift (August 2026). Product and data coverage. 300+ data points, 30M UK residential properties, REST API and data packages, pricing not published. sprift.com
- HM Land Registry, Registers of Scotland and Land and Property Services. Jurisdictional sold price sources.
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