Most homeowners in Surrey don't think of their garden as a financial asset. It's where the children played, where the dog runs around, where the barbecue lives. But if you own a large garden in Guildford, Waverley, or Elmbridge, part of that land could be worth £150,000 to £400,000 — and every year you leave it sitting there, it's costing you money.
Not because the land is losing value. But because of what you could be doing with the proceeds.
Surrey House Prices: The Uncomfortable Truth
There's a widespread belief among homeowners that property is always a good investment. And over decades, that's broadly been true. But the last five years tell a very different story for Surrey.
According to ONS data, the average property price in Surrey was approximately £518,000 at the end of 2024 — reflecting a modest annual increase of around 1.1%. Over the five-year period from 2020 to 2025, Surrey house prices have grown roughly 5–7% in total when adjusted for the post-pandemic correction.
In some boroughs it's been even flatter. Guildford and Waverley saw prices decline from their 2022 peaks before partially recovering. Elmbridge has remained relatively stable but far from the double-digit growth of the 2010s.
In real terms — adjusted for inflation — many Surrey homeowners have actually lost purchasing power on their property over the last five years.
Meanwhile, In the Stock Market...
Over the same period, the S&P 500 — the benchmark index of the 500 largest US companies — has returned approximately 85–90% in total. That's including the 2022 correction and the volatility of 2025.
Put differently: the S&P 500 has averaged roughly 14.4% per year from 2021 to 2025, compared to Surrey property's 1–2% per year.
What Does This Mean for Your Garden?
Let's run the numbers. Say your garden plot is worth £200,000 (a realistic figure for a decent-sized plot in a sought-after Surrey village). Here's what happens over five years under three scenarios:
| Scenario | Value After 5 Years | Gain |
|---|---|---|
| Keep the garden (1.5% annual growth) | £215,500 | £15,500 |
| Sell & invest in S&P 500 (14.4% avg.) | £396,000 | £196,000 |
| Sell & invest in a balanced portfolio (8% avg.) | £294,000 | £94,000 |
Even with the most conservative investment approach — a balanced portfolio averaging 8% per year — you'd be nearly £80,000 better off than leaving the land unused. With a more growth-oriented approach, the difference is close to £180,000.
The garden that's "not doing any harm" sitting there is actually costing you tens of thousands of pounds every year in foregone returns.
But What About the Garden's Value Going Up?
Here's the critical point that most homeowners miss: the plot's value as undeveloped garden land barely moves. It's the house that drives property value, not the unused 6,000 square feet at the back.
In our Gomshall case study, the homeowner's property was valued at £1.3 million before selling the garden plot. After the sale, the remaining property was independently valued at £1.235 million — retaining 95% of its value. The homeowner received £250,000 in cash and was £186,000 better off overall.
The garden wasn't contributing meaningfully to the property's value. It was just sitting there.
The Real Opportunity Cost
Let's extend this thinking over 10 years, which is a more typical investment horizon:
| £200,000 Over 10 Years | At 1.5%/yr (Property) | At 8%/yr (Balanced) | At 10%/yr (S&P Avg.) |
|---|---|---|---|
| Final Value | £232,000 | £432,000 | £519,000 |
| Total Gain | £32,000 | £232,000 | £319,000 |
Over a decade, the difference between keeping an unused garden and investing the proceeds could be over £300,000. That's the true cost of doing nothing.
This Isn't Financial Advice — It's Simple Maths
We're not suggesting everyone should sell their garden and put it all in the stock market. Investment returns are not guaranteed, and past performance doesn't predict future results. Markets go down as well as up.
But the point stands: leaving a six-figure asset sitting in your garden doing nothing, while property prices stagnate, has a real and quantifiable cost. Whether you invest the proceeds, pay off a mortgage, help your children onto the property ladder, or simply enjoy the financial freedom — the money is better in your hands than in your lawn.
How It Works With LandMax
We make this easy and risk-free:
We pay you £1,000 upfront just for giving us the option to buy the plot. We then invest £10,000–£35,000 of our own money to obtain planning permission. If planning is approved, we buy the plot at a price agreed in advance. If it isn't, you keep the £1,000 and owe us nothing.
You stay in your home. You retain ownership of everything except the agreed plot. And you unlock capital that's currently earning you nothing.
Find Out What Your Garden Could Be Worth
Free, no-obligation assessment. Takes 60 seconds.
Check If Your Garden Qualifies →A Note on Sources
Surrey property data: ONS UK House Price Index, Plumplot, and SurreyLive. S&P 500 returns: Fidelity, Carson Group, and SlickCharts. The S&P 500 5-year average annual return (2021–2025) of 14.4% is sourced from Fidelity. All figures are nominal (not adjusted for inflation). Investment returns are historical and not guaranteed. This article does not constitute financial advice.