Is Investing in Your House Still a Good Use of Your Savings?
- May 3
- 3 min read
For years, the default advice in the UK has been simple: put money into your home. Extend it, improve it, add space—brick and mortar has always felt like a safe bet.
But in 2026, with higher interest rates, more accessible investing platforms, and volatile house prices, it’s worth asking a harder question:
👉 Is investing in your home actually the best use of your cash?
Let’s break it down properly—using a real example, then comparing it to stocks, bonds, and savings.
🧱 A Real Example: The Kitchen Extension
Assume:
House value: £600,000
Extension cost: £75,000
Value uplift: +15% (£90,000)
New value: £690,000
So on paper, you’ve already “made” £15,000.
Now factor in growth. Using a realistic ~6% annual growth rate (based on Devon’s last 5 years), after 5 years:
With extension: ~£923,000
Without extension: ~£803,000
👉 Value created: ~£120,000
ROI:
Invested: £75,000
Gain: £120,000
Return: ~60% over 5 years (~10% annually)
That’s strong. But the why matters…
🧠 The Key Insight Most People Miss
You didn’t just “make money from the extension.”
You:
Created instant equity (£90k uplift)
Then benefited from compounding growth on a larger asset
👉 This is leverage through value creation—and it’s powerful.
📊 How Does This Compare to Other Investments?
📈 1. Stock Market (e.g. S&P 500)
Historical return: ~7–10% annually (after inflation ~5–7%)
Highly liquid
Volatile (can drop 20–30% in a bad year)
Tax:
Capital Gains Tax (CGT) above allowance
Dividend tax on income
👉 Pros: High long-term returns, flexibility👉 Cons: Volatility, tax drag
🏦 2. High Interest Savings Accounts
Current rates: ~4–5% (variable)
Virtually risk-free (FSCS protected)
Tax:
Interest taxed above Personal Savings Allowance
👉 Pros: Safe, liquid👉 Cons: Returns often below inflation long-term
📉 3. Bonds / Gilts (e.g. UK Gilts)
Returns: ~3–5%
Lower volatility than equities
Tax:
Some tax advantages (e.g. gilts can be CGT-free)
👉 Pros: Stability👉 Cons: Lower real returns
🧱 4. Your Home (Extension Investment)
Example return: ~10% annually (leveraged through growth)
Illiquid
Concentrated risk (one asset)
Tax:
No CGT on your primary residence (huge advantage)
👉 Pros:
Tax-free gains
Forced appreciation (you control value)
Lifestyle improvement
👉 Cons:
Capital tied up
Build risk (cost overruns, planning, delays)
Market dependency
⚖️ The Tax Advantage (This Is Huge)
Here’s where property—specifically your primary residence—quietly wins:
Investment | Tax on Gains |
Stocks | CGT + dividend tax |
Savings | Income tax on interest |
Bonds | Income tax (mostly) |
Your Home | ✅ 0% CGT |
👉 That 10% return from your extension is effectively tax-free
To match that in stocks, you might need:
12–14% gross returns pre-tax
⚠️ The Risks (Don’t Ignore These)
This isn’t a free win.
1. Build Risk
£75k can easily become £90k+
Poor design = no uplift
2. Market Risk
If prices stagnate, your ROI collapses
3. Liquidity Risk
You can’t sell “just the extension”
4. Concentration Risk
You’re doubling down on one asset
🧠 So… Is It a Good Investment?
✅ YES — if:
You add genuine, desirable space (open-plan, light, layout improvement)
Costs are controlled
You’re in a strong regional market
You plan to hold for 3–5+ years
❌ NO — if:
It’s over-specified for the area
You’re stretching financially
You expect short-term gains
The uplift is marginal (<10%)
💡 Final Verdict
Investing in your home is no longer the obvious default—but:
👉 It can still outperform traditional investments when done well
Because it combines:
Forced appreciation
Market growth
Tax-free gains
That’s a rare combination.
🧭 The Balanced Approach
For most people (and likely for you):
Use property to create tax-free equity
Use markets to build liquidity and diversification
Not either/or—both, strategically
Want to calculate the returns on your own project? Use our calculator
Comments