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REPORTS · AUCTION DUE DILIGENCE

Auction Site Due Diligence in 48 Hours

Auction site due diligence: hero image
48 hours from confirmed boundaryDesktop study

The legal pack just landed in your inbox, the auction date is in the calendar, the bridging facility is lined up, and the only question left is the bid cap.

This page is written for SME and small developers bidding on infill plots, backland sites, small brownfield lots, pub or garage conversions, and 1 to 20 unit schemes, where a 10% deposit on the fall of the hammer is a real personal exposure and bridging or auction finance terms run on a tight clock.

Our desktop screen reviews flood, ground, ecology, heritage, access and policy constraints against published Environment Agency, Coal Authority, Historic England and local plan data, in 48 hours, between legal pack publication and the hammer. It is risk screening, not a guarantee.

Order a Site Appraisal · See a sample report

In the legal packNot in the legal pack
Title plan, registers, special conditions of sale, planning history, Land Registry searchesCurrent EA Flood Zone read, Coal Authority CMRA trigger, BNG screening, heritage setting review, grey belt test under NPPF paragraphs 154 to 155 (December 2024)

The legal pack confirms ownership and contract terms. The constraint screen indicates whether the planning route is credible. Each missing item maps directly to bid-cap impact:

  • Flood sequential test under NPPF paragraph 174 (December 2024) can rule out higher-density residential and force a lower density scheme, which lowers the GDV the bid can support.
  • Coal Authority CMRA in a Development High Risk Area adds a specialist report, possible intrusive investigation, and remediation cost and time before commencement.
  • Access and highways can expose ransom strips, unadopted frontages, or visibility splays needing third-party land, all of which carry a price and a delay.
  • Ecology survey seasons (bats, nesting birds, GCN) can push the planning programme by 6 to 9 months if the window is missed.
  • Heritage setting near a listed building under NPPF paragraph 207 (December 2024) raises objection risk and can force scheme redesign or reduced height.

For the deeper read, see our auction site due diligence guide.

Four packs sized to four decisions

SITE SCREENING. For auction bidding, start here. Decision: Is this auction lot worth bidding on? From £199, 48 hours from confirmed boundary. This is the pack to order between legal pack publication and the auction. The other three packs below are for after the hammer falls or for a separate planning route, so resist the urge to overbuy at the bidding stage.

Order a Site Appraisal · See a sample report

PackDecision momentFrom
Feasibility IntelligenceAfter winning the lot, before committing capital, IC paper, or funder drawdown£895
Pre-Application PackWalking into pre-app with the LPA on a fresh application£1,995
Planning Intelligence PackSubmitting alongside the architect's drawingsTailored

See the auction site due diligence guide for which pack fits which lot.

Hour 0, Hour 24, Hour 48

  1. Hour 0. Send postcode, title plan or red-line boundary from the legal pack, intended use, and indicative dwelling count.
  2. Hour 24. Internal QA on flood, coal, ecology, heritage, access and policy flags.
  3. Hour 48. Receive the constraint screen with traffic-light verdict, overlay maps, and any sequential test trigger under NPPF paragraph 174 (December 2024).
  4. Day 4 (your decision). Use the report to finalise your bid cap, price in abnormal costs, or walk before exchange and deposit risk.

A £199 to £399 screen against a 10% deposit on a £250,000 to £1,000,000 lot is around 0.2 to 1.6 percent of the deposit at risk.

Send the boundary today, finalise the bid cap on Day 4

If the legal pack is in your hand and the auction date is in the calendar, a 48-hour screen reduces deposit risk before you raise the paddle. Use it to lower your maximum bid, price in abnormal costs, or walk before exchange.

  • Inputs: postcode, red-line boundary, intended use, dwelling count.
  • Turnaround: 48 hours from confirmed boundary.
  • Deliverable: traffic-light constraint screen, overlay maps, NPPF policy flags including paragraphs 154 to 155 and 165 (December 2024). See what is included in our 48-hour desktop pack.

From £199 to inform whether to bid. From £895 once the lot is won. From £1,995 to walk into pre-app. Tailored to submit alongside the architect drawings.

What this desktop report does not replace. The screen is a desktop constraint review designed to inform a bid decision. It does not replace a Phase 2 ground investigation, hydraulic flood modelling, seasonal ecology survey, transport assessment, drainage strategy, heritage statement, or RICS valuation. Where the screen flags a trigger, the report names the specialist study, the indicative cost range and the typical timeline. The screen does not provide a legal opinion. Title, easements, covenants, overage and special conditions of sale remain with the conveyancing solicitor.

See our development land due diligence main page for the wider buyer-moment version of this same workflow.

Order a Site Appraisal

48 hours from confirmed boundary. £199 (1-9 dwellings), £299 (10-50), £399 (51-200). Feasibility Intelligence from £895 once the lot is won. Pre-Application Pack from £1,995. Planning Intelligence Pack tailored.

Order a Site AppraisalSee a sample report