How to Analyse a UK Property Deal in 10 Minutes

Property investors who scale don't analyse deals slowly — they triage fast and analyse deeply only the ones that look promising. This guide gives you a repeatable 10-minute framework to evaluate any UK buy-to-let, HMO or flip opportunity before you waste a viewing, an offer or a survey fee.

Step 1: Establish the realistic purchase price

The asking price is rarely the deal price. Look at:

• Recent sold comparables (Land Registry, Rightmove sold prices) within 0.25 miles, same property type, same number of bedrooms.
• How long the property has been on the market — over 3 months suggests room to negotiate.
• The vendor's situation: probate sales, distressed sales and motivated investors usually take 8–15% below asking.

Set your max bid before you make the offer, not during the negotiation.

Step 2: Estimate the refurb honestly

Walk through every room and assign a number. UK rules of thumb:

• Light refresh (decor, carpets, deep clean): £4–£8k per property.
• Full kitchen replacement: £5–£12k.
• Full bathroom replacement: £3–£6k per bathroom.
• Full rewire: £4–£7k for a typical three-bed.
• New boiler and central heating: £3–£5k.
• Windows: £600–£1,000 each.
• Loft conversion: £30–£60k.
• Single-storey extension: £25–£50k.

Add a 15–25% contingency on top. Refurbs over-run more often than they come in under budget.

Step 3: Establish the realistic rent

Use SpareRoom for HMO room rates, OpenRent and Rightmove for single lets, and at least one local letting agent for a sanity check. Don't rely on the asking rents you see online — check what's actually let recently.

Step 4: Model the financing

• What's the deposit (typically 25%)?
• What's a realistic mortgage rate today and stress rate?
• Will the rent pass the lender's stress test (commonly 145% at 5.5–7%)?
• If using bridging, what's the total interest cost across the expected hold?

See our bridging finance guide for the full breakdown.

Step 5: Build the cash flow

Monthly:

• Rent (net of voids — use a 5–8% void allowance).
• Less mortgage interest.
• Less management (8–15% of rent depending on type).
• Less maintenance reserve (10% of rent is a safe baseline).
• Less ground rent / service charge if leasehold.
• Less landlord insurance, gas and electrical compliance, licensing fees (annualised).
• Less bills (HMOs only).

What's left is your monthly net cash flow. If it's under £150/month per property after all of the above, the deal has no buffer for rate rises or void shocks.

Step 6: Calculate ROI honestly

Cash-on-cash ROI = annual net cash flow ÷ total cash invested (deposit + stamp duty + legals + refurb). Anything below 6% cash-on-cash on a single let in 2026 is hard to justify unless you have a strong capital growth case. HMOs and BRRR-with-pull-out can target 15%+.

For a deeper dive, see rental yield vs ROI.

Step 7: Test the exit

Always know how you'd sell:

• To owner-occupiers (works for single lets).
• To another investor on yield (works for HMOs and tenanted singles).
• By BRRR refinance and hold long-term.
• Flip — see the deal-killer questions below.

Common deal-killers to spot fast

• Short lease (under 80 years) — expensive to extend, kills mortgageability.
• Cladding or EWS1 issues on flats post-Grenfell — major mortgageability hit.
• Article 4 area for HMO conversions — planning required.
• Coal mining or flooding risk in the area — survey shock and insurance cost.
• EPC below E (and below C from 2030 for new tenancies under proposed rules).
• Leasehold flats with onerous ground rent escalation.
• Non-standard construction (prefab, BISF, single-skin brick) — limited mortgage options.

For more on the strategies you might apply once a deal passes triage, see BRRR strategy explained and HMO vs buy-to-let.