Tracking UK Property Market Activity via API: Listing Events, Price Reductions, and Deal Flow

What Land Registry doesn't tell you

Land Registry is the canonical source for UK property transactions. If a property sold, it's in there — eventually. The problem is that word "eventually." The typical gap between completion and registration runs two to four months. By the time it appears, the market has moved on.

Land Registry only records completions. It tells you nothing about the journey from listing to sale: when a property first came to market, how many price cuts happened before an offer was accepted, how long it sat as Sold STC before the deal fell through. That's the data estate agents use to price correctly and investors use to find deals. HM Land Registry Price Paid Data is published monthly and is the authoritative source for completed transactions — Homedata's Market Activity data covers everything in between.

Homedata Market Activity covers the full listing event timeline for UK properties that have been marketed: Added, Reduced, Under Offer, Sold STC, Withdrawn, and Completed. Thirty years of history, UPRN-linked. It is an enterprise dataset, arranged per customer rather than sold self-serve, so access starts with a conversation about coverage and volume.

What the data covers

Every event is recorded against the UPRN, so a property's history holds together across changes of agent, re-listings, and the address reformatting that breaks naive string matching. Each event carries its type, the date it happened, the price where there is one, and the listing cycle it belongs to. A listing cycle is a single stretch of market activity — from first listing to either withdrawal or completion.

The six event types:

Added — first listed, with asking price and listing agent
Reduced — price cut, with the new price and date
Under Offer — an offer accepted, but not yet exchanged
Sold STC — sold subject to contract (offer accepted, solicitors instructed)
Withdrawn — removed from the market before sale
Completed — exchanged and completed (cross-references Land Registry)

What a listing history looks like

A single property's timeline, from first listing to offer accepted:

12 Jan 2024   Added       £595,000
28 Feb 2024   Reduced     £575,000
05 Mar 2024   Reduced     £565,000
15 Mar 2024   Sold STC    £565,000

Four events, and the questions that matter answer themselves: 63 days from listing to Sold STC, two cuts, 5% off the original asking price. Across a street, a postcode or a whole portfolio, the same events turn time-on-market and discount-to-asking into measurable series rather than anecdotes.

Watching for price reductions

Deal monitoring is the other common shape. Rather than one lookup, you want a standing watch on a set of properties and a signal when one is Reduced, comes back after a withdrawal, or falls out of Sold STC. That is set up per customer: which events you want, for which properties or areas, and at a frequency your system can absorb.

Practical use cases

1. AVM enrichment — time-on-market as a value signal

A property that sold in 14 days at asking price is a different market signal to one that sat for 180 days and took three reductions. Incorporating days-on-market and reduction history as features in an automated valuation model gives you a quality-of-demand signal that comparable sold prices alone can't provide.

2. Estate agent CRM — vendor pricing alerts

When a vendor instructs you after listing with a competitor, the event history shows you exactly how long they've been on market and where the price has moved. Walk in knowing the data instead of asking for it.

3. Investment deal flow — finding motivated sellers

Properties that have been Reduced more than once, or that came back to market after a withdrawal, often represent motivated sellers. Tracking these systematically — by area, property type, and price band — surfaces deals before they hit the forums.

4. Conveyancing due diligence — fall-through history

A property that went Sold STC and then came back to market twice is worth scrutinising. That pattern — Sold STC → returned as Active — shows up in the event timeline and is worth flagging to buyers before they commit to survey costs.

5. Mortgage/lending — LTV recalculations on refinance

For a property being refinanced, the listing event history gives you recent price discovery: if it was listed and reduced 8 months ago, that's evidence of market value that an AVM alone can miss.

Combining listing events with sold prices

The listing event history tells you the journey. Land Registry tells you the outcome. Together they let you verify that a sale completed at the agreed price — or spot the cases where it didn't. The two are matched on the UPRN, and the gap between the price a property went Sold STC at and the price it finally registered at is a signal in its own right.

Getting access

Market Activity is an enterprise dataset. It stays live for the customers already using it, but it isn't part of self-serve signup — coverage, volume and delivery are agreed per customer.

If that's what you need, tell us what you're building and which properties or areas you need to track. The rest of the Homedata API is self-serve, and the Getting Started guide covers authentication and your first call.