Development finance on a straightforward site with full planning is challenging enough. This deal was anything but straightforward — a former residential plot with a live railway line on its southern boundary and an active contamination risk from a buried underground fuel tank. Two issues that, without the right lender and the right structure, would have killed the deal at the credit committee stage.
We arranged a £2.4 million facility — covering 60% of the £600,000 land purchase and 100% of the £1.8 million build costs — in four weeks from instruction to completion. Here's how the deal was structured and why the approach matters for developers facing technically complex sites.
| Detail | |
|---|---|
| Finance type | Ground-up development finance |
| Total facility | £2,400,000 |
| Land purchase price | £600,000 |
| Land loan (60% LTV) | £360,000 |
| Build cost facility | £1,800,000 (100% of build costs) |
| Build drawdown structure | In arrears against QS certification |
| Scheme | 8 new-build residential dwellings |
| Previous use | Pair of semi-detached bungalows |
| Site constraints | Active railway line (southern boundary), underground fuel tank (red diesel contamination risk) |
| Planning status | Full planning consent granted |
| Time from instruction to completion | 4 weeks |
The site's southern boundary ran directly adjacent to an active railway line. This creates a series of legitimate lender concerns: Network Rail's Approval in Principle (AiP) requirements for any works near the operational boundary, the potential for vibration and structural impact on the proposed dwellings, and the knock-on effect on end values if the proximity to the line is reflected in the RICS valuation. Mainstream development lenders often decline or significantly restrict lending on railway-adjacent sites without a clear mitigation plan in place.
The site had previously been used as a private residential plot with an underground fuel tank used to store red diesel — a common feature on older rural and semi-rural properties. Buried fuel tanks represent an environmental liability that triggers Phase 1 and potentially Phase 2 contamination surveys before any lender will proceed. The presence of an undecommissioned tank — even one believed to be empty — is a material risk that affects both the lender's security and the end valuation until remediation is confirmed.
Our approach was to address both constraints head-on in the credit submission rather than hoping the lender wouldn't focus on them — a mistake that costs developers weeks when lenders raise concerns mid-process. We commissioned the relevant reports early, presented a clear remediation and construction methodology to the lender, and identified a specialist development finance lender with appetite for technically complex sites.
We worked with the developer's structural engineer and planning consultant to confirm the extent of the Network Rail proximity zone and the proposed construction methodology for the plots closest to the boundary. The lender's surveyor was briefed in advance of the valuation — not left to discover the constraint on site — and the valuation report addressed the proximity risk directly, with comparable evidence supporting the end values on a scheme of this type.
The key was demonstrating to the lender that the railway constraint was known, quantified, and managed — not an unknown variable that might emerge post-drawdown. Lenders are comfortable with managed risk. They are not comfortable with surprises.
A Phase 1 desktop environmental survey was commissioned immediately and confirmed the presence of the buried tank and the nature of the former use. Rather than waiting for a full Phase 2 investigation before approaching lenders — which would have added weeks to the process — we structured the facility with a retention held against Phase 2 completion and a confirmed remediation contractor in place.
This meant the deal could proceed to completion on the land purchase while the contamination risk was formally quantified and costed, with the lender holding appropriate comfort through the retention mechanism. The tank was subsequently decommissioned and the contamination confirmed as limited in scope, releasing the retention in the normal course of the build programme.
💡 The lesson: The instinct on a complex site is to resolve every issue before approaching a lender. In practice, the better approach is often to structure around the risk — retentions, phased drawdowns, specialist reports — and present a clear mitigation plan that gives the lender confidence. Done correctly, this is faster and keeps the momentum of the deal intact.
The £2.4 million facility was structured in two components, which is standard for ground-up development finance but worth understanding in detail:
The land loan was drawn on completion of the site acquisition. Contributing 40% equity into the land purchase — £240,000 — is a normal requirement for development finance lenders on residential schemes of this type. It demonstrates the developer's commitment to the project and ensures there is adequate equity in the scheme from the outset. The land loan remained outstanding throughout the build, to be repaid from sales proceeds or refinanced at practical completion.
The build facility was structured as a series of drawdowns made in arrears against Quantity Surveyor (QS) certification. This is the standard mechanism for development finance and is worth understanding if you haven't worked with it before:
The in-arrears structure protects the lender by ensuring funds are only released against verified, completed works. For the developer, it means having sufficient working capital to fund each stage ahead of the QS sign-off — something that should be planned into the project cashflow from day one, not discovered mid-build.
Developer briefed us on the site, the planning consent, and the two key constraints. We prepared a structured credit summary and identified three specialist development lenders with proven appetite for technically complex sites. Phase 1 environmental survey commissioned immediately.
Full credit submission presented to the preferred lender, including site appraisal, planning documents, construction methodology, railway proximity analysis, and Phase 1 desktop report. Decision in Principle issued within 48 hours. Valuation instructed immediately on DIP.
RICS valuation completed with the railway proximity addressed and end GDV confirmed. Formal facility offer issued. Developer's solicitors and lender's solicitors instructed simultaneously. Retention mechanism for Phase 2 contamination survey agreed and documented.
Land purchase completed with the £360,000 land loan drawn on the day. Build facility activated. QS appointed and first site inspection scheduled. Developer on site within days of completion.
Four weeks is fast for a development finance deal of this complexity. It wasn't achieved by cutting corners — it was achieved by front-loading the work. The environmental report was commissioned before lenders were approached. The structural engineer's position on the railway boundary was documented before the valuation. The credit submission was complete and professionally presented on day one.
Developers who lose time on finance — and many lose months, not weeks — typically do so because they approach lenders reactively, with incomplete information, and then spend weeks responding to queries that could have been anticipated. A well-prepared submission to the right lender, on a deal structured to address the known risks, moves at pace.
"The two issues that would have stopped most lenders — the railway line and the fuel tank — were the first things we put in front of the credit team, not the last. By the time the valuer arrived on site, the lender already understood the risks and had a view on how they were being managed."
— MW Capital AdvisoryTechnically challenging sites — contamination, railway adjacency, flood zones, unusual planning conditions — are our speciality. We know which lenders have genuine appetite for complex deals and how to present them to get a swift, credible response. Tell us about your site.
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