Development Finance Calculator

How the Development Finance Calculator Works

Our development finance calculator is designed to give Ealing property developers a clear, instant estimate of the finance available for their project. By entering your purchase price, build costs, and expected Gross Development Value (GDV), the calculator models the maximum facility a lender is likely to offer based on two key lending constraints: Loan-to-Cost (LTC) and Loan-to-GDV.

Development finance lenders in the UK use both LTC and GDV ratios to determine the maximum amount they will lend. The LTC ratio represents the percentage of total project costs (purchase price plus construction costs) that the lender will fund, typically ranging from 60% to 75%. The GDV ratio caps the loan at a percentage of the completed project value, usually between 55% and 65%. The lower of these two calculations determines your maximum facility, which is how real-world lending decisions work.

Understanding the Key Inputs

The purchase price is the cost of acquiring your development site or existing building. In Ealing, typical site values vary significantly depending on location. Sites near Ealing Broadway or Acton with Elizabeth Line access command premiums, while areas such as Southall, Greenford, and Northolt offer more competitive entry points for developers. As of 2024, average property prices in Ealing range from around £370,000 in Northolt to over £625,000 in Ealing Broadway.

Build costs encompass all construction expenditure, including contractor costs, materials, professional fees (architect, structural engineer, quantity surveyor), and any enabling works such as demolition or remediation. For ground-up residential developments in the Ealing area, build costs typically range from £150 to £250 per square foot depending on specification, site constraints, and the complexity of the build programme.

The Gross Development Value (GDV) is the estimated total sales value of the completed development. This is typically established through an independent RICS valuation or supported by comparable evidence from recent sales in the area. The GDV is a critical figure because it determines the project's overall viability and directly influences the maximum loan amount available.

How Interest and Fees Are Calculated

Development finance interest is charged monthly, typically on the drawn balance rather than the full facility. Since funds are released in stages as construction progresses (against quantity surveyor certification), the average outstanding balance over the term is usually around 60-70% of the total facility. Our calculator uses a 65% average drawdown assumption to provide a realistic estimate of total interest costs.

The arrangement fee is charged by the lender at the outset, typically ranging from 1% to 2% of the gross facility. Our calculator uses 1.5% as a standard assumption. Additional costs not captured in this calculator include valuation fees, legal fees, monitoring surveyor fees, and potential exit fees. When you speak to our team, we will provide a fully transparent breakdown of all costs associated with your facility.

Development Finance for Ealing Projects

The London Borough of Ealing has become one of West London's most active development markets, driven by the transformative impact of the Elizabeth Line (Crossrail). With three Elizabeth Line stations in the borough — Ealing Broadway, West Ealing, and Acton Main Line — journey times to the West End, City, and Canary Wharf have been dramatically reduced, fuelling residential demand and supporting strong GDV growth.

Developers working across Ealing's diverse neighbourhoods face different opportunities and challenges. In established areas like Ealing Broadway and West Ealing, higher land values require larger facilities but are supported by strong end-sale prices. In regeneration areas like Southall and North Acton, more competitive entry costs can deliver stronger margins, though lenders may scrutinise comparable evidence more carefully.

Whether you are undertaking a ground-up new build, a commercial-to-residential conversion under Permitted Development, or a heavy refurbishment scheme, our calculator helps you model the financial structure before approaching lenders. For a more detailed and personalised assessment, contact our team. We can provide indicative terms from our panel of over 100 specialist development finance lenders within 24 hours, helping you move quickly and secure the best possible terms for your Ealing development project.

Tips for Maximising Your Development Finance

To secure the most competitive development finance for your Ealing project, focus on demonstrating a clear and realistic appraisal. Ensure your GDV is supported by strong comparable evidence — ideally recent sales of similar properties within half a mile of your site. Keep your build cost estimates detailed and realistic, backed by contractor quotes or a quantity surveyor's cost plan. Lenders will also want to see planning permission (or evidence of Permitted Development rights), a clear build programme and timeline, and evidence of your development track record.

If you are a first-time developer, do not be discouraged. Many lenders on our panel will consider first-time developers, particularly where the scheme is straightforward and supported by an experienced professional team. Appointing a reputable contractor, engaging a project monitor, and having a credible exit strategy (such as pre-sales or a refinance plan) will strengthen your application significantly.