In property investment, the margin between success and a failure is often far thinner than most people realise.
When deals go wrong, investors and funders may blame build costs, planning delays, or sudden market shifts. In reality, the biggest losses usually happen long before the first brick is laid.
Here are six finance mistakes I see repeatedly. Each one has the power to erode profits, stall growth, or wipe out returns entirely.
The surest way to overpay for a site is to guess your finance costs.
When developers and investors underestimate the cost of debt or miscalculate leverage, the Residual Land Value (RLV) is instantly compromised. If the cost of finance is estimated too low, the projected profit looks higher than it really is. That artificial profit then feeds directly into the land calculation, convincing the developer there is more headroom to bid on the site than actually exists.
In other words, guess the finance, and you risk inflating the land price, and once that mistake is baked in, it’s almost impossible to recover from.
These errors are often small assumptions that compound. A developer might assume 70% loan-to-cost when the lender will actually offer only 65%. They might budget a 7 percent interest rate when the true cost, once arrangement fees, exit fees, monitoring surveyors and legal costs are included, is closer to 8.5 percent.
On a £10 million development, that difference is not marginal. It can shift hundreds of thousands of pounds from projected profit into finance costs.
The same applies to timing assumptions. If your appraisal assumes a 14-month build programme but lender drawdowns, valuation timings, or planning conditions push that to 18 months, the additional interest roll-up can wipe out a large portion of your expected margin.
And once you have secured the site, there is no easy way back. You cannot renegotiate the land price simply because you guessed your funding costs wrongly.
If you are not working with precise, real-time data on your finance options, you cannot accurately calculate the viability of your deal. No financial investment should ever be underpinned by guesswork.
Loyalty can be admirable, and we all enjoy the recognition of being a repeat customer somewhere, whether it’s the garage squeezing your car in that afternoon or being greeted by your first name in your local restaurant.
However, when it comes to choosing a development finance lender, sticking with the same lender because you have a “good relationship” might feel safe, but it’s likely to be costing you hundreds of thousands of pounds.
Even if it seems convenient, and they have all your details stored on file, it pays in colossal amounts, to shop around. Every development has a different risk profile, and every lender prices risk differently. There is no universally best lender, only the best lender for a specific deal at a specific moment in the market.
By not shopping around, or by failing to use technology that compares the breadth of the market, you leave your Return on Capital Employed (ROCE) to chance, rather than strategically accounting for every pound you invest.
The Loyalty Tax in Numbers: A Case StudyAn experienced developer wanted to progress two sites at the same time, but the bank required a £1.5m deposit for just one scheme, meaning the second site would have to wait. After 20 years of lender loyalty, he decided to shop around, and came across Brickflow’s loan comparison. Bank proposal:
Brickflow analysis:
Loyalty cost: £600k of trapped equity and years of lost momentum. |
Many loyal borrowers only realise after years of paying the “loyalty tax” that a lender is not a friend. A friend would look after your best interests. A friend would tell you there is another lender offering the same loan at a cheaper price, or a much bigger loan at the same price. A lender does not do that.
Loyalty is not rewarded in debt markets. Market discovery is.
Concentrating all your borrowing with one lender is not efficiency. It is exposure.
When multiple projects sit with a single lender, they are often cross-collaterised. This means the lender’s security is not limited to one site. Instead, several schemes in your portfolio are tied together under the same facility.
On paper this can feel convenient. The lender already knows you, understands your track record, and may be willing to move quickly.
But the risk is significant. If one scheme runs into trouble, perhaps a planning delay, a cost overrun, or a slower-than-expected sales period, the lender can trigger cross-default provisions. In practical terms, that means problems on one project can give the lender leverage over every other scheme secured within that facility.
A single underperforming project can suddenly place your entire portfolio under pressure.
In extreme cases, developers find themselves forced to inject additional equity, sell assets earlier than planned, or refinance multiple projects simultaneously just to resolve issues on one site.
Diversification across lenders reduces this risk. By separating funding lines, a delay or setback on one project is far less likely to cascade across the rest of the portfolio. If an IFA told you to invest all of your money in one stock, you’d think they were crazy. Debt should be no different.
Many developers chase the lowest headline interest rate, assuming it’s the best deal.
It rarely is.
They focus on the rate above all else, searching solely on that basis and immediately dismissing lenders whose rate might be 0.02 percent higher.
Lenders know this, enticing developers with their lower rates, but they typically have lower lending limits to match, forcing borrowers to inject more of their own equity, which is the most expensive capital in your stack
Saving a few basis points on interest at the expense of additional leverage can end up costing far more opportunity cost. Tying up your cash to access a marginally cheaper rate limits your ability to recycle capital, scale your pipeline, and respond to new opportunities.
The real question is not “What is the rate?” It’s “What does this do to my return on equity?”
The Rate Chaser: A Case StudyA rate chaser came to Brickflow in despair as he funnelled more and more of his own capital into his project, and started to think there must be a better way to finance this: Loan: Borrowed from a high-street bank with a low rate Consequences
Career impact: One development effectively consumed 4 years Brickflow analysis: |
With the UK planning system continuing to be a slow and protracted process, concentrating 100 percent of your equity in a single deal has become increasingly risky.
Sophisticated developers operate rolling pipelines, typically with:
While one/two schemes work their way through the planning system, another is generating progress on site and another is approaching completion and capital recovery. This staggered structure protects liquidity and keeps it moving through the entire business, meaning that if one project stalls, the business does not.
Developers who bet everything on a single scheme are not just exposed to planning risk. They are exposed to Return on Capital over time. If that one project is delayed by a year or more, the developer has lost that year of momentum, opportunity and capital rotation.
Property developers outsource everything from managing the site to landscape design, and planning applications to construction.
So why treat your debt differently?
Yet, many developers attempt to arrange their own funding, assuming that approaching a handful of familiar lenders will produce a competitive result. In reality, they are often negotiating with a very small slice of the market, without knowing how their deal compares to what lenders are offering elsewhere.
That can mean accepting restrictive covenants, slower credit processes, lower leverage, or simply a more expensive loan structure than necessary.
Most developers enter the debt market two or three times a year, so it’s understandable that their knowledge on specialist finance can be lacking. Meanwhile a specialist debt adviser is in the market every single day.
They know:
That expertise compounds over time, giving you inside access to a market that you know only on the surface.
We recently watched a debt adviser use our software to save a borrower £480,000 on a single scheme in under two minutes.
The developer had spent two months trying, and failing, to arrange the funding themselves.
If your investors knew you were leaving that much profit on the table by doing it yourself, would they still back you?
In development, success is rarely just about building well. It is about structuring capital intelligently before the deal even begins.
Brickflow enables you to do exactly that, and eradicates any more finance guesses, misplaced lender loyalty and pointless rate chasing, whilst helping you spread your equity and scale sooner. Run your numbers now.
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