7.22% Rent by the room return before costs — verify the rent + comps locally.
Why it works
Long lease (113 yrs) — no short-lease drag
Why to be cautious
Monthly profit −£230/mo — significantly negative — real recurring drain
-1.9% 5y IRR — capital outlay disproportionate to returns
No rent comparables — estimate is a rule-of-thumb fallback, not market data. Verify the rent locally before offering.
EPC band not stated — verify the certificate before offering (2030 MEES minimum is band C).
Property research tool — not a regulated financial service. Numbers are point-in-time estimates; how we decide →
Monthly cashflow
−£230/mo
You top up £230/mo
Price vs market
Above comparable sales
+16% vs 12 sold
Return · IRR
-1.9%/yr
Loses money over 5 years
Cash to get in
£163K
Deposit + fees + refurb
Price £400KReturn before costson price · Rent by the room7.22%5-yr return on cash -2%Rent est. £2,195 (£1,996–£2,414)
How we define each return:On price — gross yield = annual rent ÷ purchase price.On cost — net yield ÷ total project cost (price + refurb + fees).On cash — cash-on-cash & ROI ÷ the actual cash you put in (deposit + costs).
Listing seen …
What-if calculator
Edit any input — outputs recalc liveRates as of 20 May 2026
Buy-to-Let. Standard rental on an Assured Shorthold Tenancy. Single household, market rent, paid monthly direct to landlord (or via agent). (hover any strategy tab for pros + cons)
Offer (£)
Monthly rent (£)
Local comp range: £1,996–£2,414/mo · n=26
Financing
DepositYour cash in — the rest is the mortgage25% · £99,999
5%100% (cash buy)
Standard 75% LTV for BTL
Mortgage rate5y fixed5.8%
3.0%9.0%
5-year fixed at 75% LTV — 5.75% (as of 2026-05-20).
Mortgage term (years)
Stress rate6.5%
5.0%9.0%
BoE base + 2pp stress (6.5%)
Acquisition costs
Refurb (£)
Per-property refurb estimate from the element rate-card model (£17,630–£32,908 range), VAT-inclusive
Legal + survey (£)
Leasehold flat — £1,875 legal + £650 survey
Mortgage fees (£)
2% product fee on £299,996.25 loan + £1,000 booking fee
Running costs
Management10%
0%20%
Typical BTL agency rate
Void weeks
Typical voids for BTL
Insurance (£/mo)
Typical BTL building+landlord cover for £200K–£400K
Net Monthly profit after tax. Rent + costs compound at their growth rates; mortgage principal amortises year-by-year for repayment loans.
Mortgage paydownRent profitbefore price growth
Full year-by-year breakdown
Year
Gross Rent
Op Costs
Mortgage
Equity Built
Tax
Net
Cumulative
Year 1
£26,340
£8,585
£19,500
£0
£0
-£1,745
-£1,745
Year 2
£27,130
£8,843
£19,500
£0
£0
-£1,212
-£2,957
Year 3
£27,944
£9,108
£19,500
£0
£0
-£663
-£3,620
Year 4
£28,782
£9,381
£19,500
£0
£0
-£98
-£3,719
Year 5
£29,646
£9,662
£19,500
£0
£92
£392
-£3,327
Year 5 disposal
Disposal gain (gross)-£25,440
CGT£0
Net Disposal proceeds£430,586
What we verified
What we verified
12 total · click to expand
50075 ok · 0 caution · 0 fail · 7 unknown
Legal & planning
Leasehold113 yr
Leaseholdmaterial factsListing extract
Lease remaining
Mortgageable ≥80yr
113 yr
Ground rent
Doubling = lender risk
£10/yr
Service charge
Annual running cost
£775/yr
Extracted from listing description · verify with solicitor
Tenure & planning113 yr
Legal & planning
2 checks
TenureUnknown
Lease lengthUnknown
Council planning restrictionUnknown
Council planning restrictionRent by the room conversion gatePlanning data
Conversion approvability
Per-property planning assessment
Likely approvable67% likely
Confidence: low
•Article 4 direction applies — planning permission required for C3->C4 HMO
•no known HMOs within 100m (below threshold)
•local council HMO approval rate 66% (757 decisions)
•NOTE: council HMO concentration policy not curated — the modal English policy (10% within 100m) is shown as an indication, not this council's adopted threshold
•NO HMO concentration data for this council: neither a licensed register nor granted change-of-use decisions nearby. This is ABSENCE OF DATA, not absence of HMOs — verify with the council before relying on it
Rent by the room concentration nearby
≈0.0% within 100 m vs 10% policy
Council HMO policy not curated — assessed against a 10% / 100 m default; a low/absent count reflects register coverage, not zero nearby HMOs.
We don't ingest the NHLE bulk register, so we can't flag listed-building or conservation-area status for this address from our data alone. Use the official registry to verify before exchanging.
Total cash neededdeposit + costs (loan covers the rest)£163,030
Green = verified data. Amber = market typical. Red = our estimate — verify before offering.
About this propertydescription · rightmove
Description& agent copyRightmove
Sterling Sales and Lettings is delighted to present this exceptionally spacious and beautifully presented three-bedroom second-floor apartment, perfectly positioned on the EN1 / Winchmore Hill (N21) border.
Located literally moments from the N21 boundary, this modern property combines the vibrant convenience of local high-street amenities and transport links right on your doorstep with the peaceful green surroundings of a well-maintained purpose-built block.
6.59% Return before costs — around the area average for this property type.
Monthly profit −£230/mo at the default 25% deposit @ 5.5% — open the calculator to stress-test.
Price
£400K
16% above sold comps
Return before costs (best)
7.22%
Rent by the room
Bedrooms
3
1 bath
Energy rating
—
Energy rating
Run the numbers
Each tab prefills
What-if calculator
Edit any input — outputs recalc liveRates as of 20 May 2026
Buy-to-Let. Standard rental on an Assured Shorthold Tenancy. Single household, market rent, paid monthly direct to landlord (or via agent). (hover any strategy tab for pros + cons)
Offer (£)
Monthly rent (£)
Local comp range: £1,996–£2,414/mo · n=26
Financing
DepositYour cash in — the rest is the mortgage25% · £99,999
5%100% (cash buy)
Standard 75% LTV for BTL
Mortgage rate5y fixed5.8%
3.0%9.0%
5-year fixed at 75% LTV — 5.75% (as of 2026-05-20).
Mortgage term (years)
Stress rate6.5%
5.0%9.0%
BoE base + 2pp stress (6.5%)
Acquisition costs
Refurb (£)
Per-property refurb estimate from the element rate-card model (£17,630–£32,908 range), VAT-inclusive
Legal + survey (£)
Leasehold flat — £1,875 legal + £650 survey
Mortgage fees (£)
2% product fee on £299,996.25 loan + £1,000 booking fee
Running costs
Management10%
0%20%
Typical BTL agency rate
Void weeks
Typical voids for BTL
Insurance (£/mo)
Typical BTL building+landlord cover for £200K–£400K
Tenant profileBeds + postcode heuristicFamily / Rent by the room
Rent by the room feasibilityMin 3 beds for C4 routeFeasible
Comparables
sold within 0.5 mi
Wide · CV 32.1%Med confidence
Loading nearby sold…
Location & transport
Score 100/100
Loading map…
PropertySchoolsUniversitiesStationsArticle 4
Transport detail not loaded for this property.
Tax & exit
Ltd Co
Tax bandLtd Co 25%
Mortgage-interest tax rule credit£3,900
Annual rental tax£0
CGT yr 5£0 · company level
5y net total-£3,327
Acquisition costs
£163K
25% deposit£99,999
Stamp duty£30,000
Refurb£23,506
Legal + survey£2,525
Mortgage + broker£7,000
Cash needed£163,030
Green = verified data. Amber = market typical. Red = our estimate — verify before offering.
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Description& agent copyRightmove
Sterling Sales and Lettings is delighted to present this exceptionally spacious and beautifully presented three-bedroom second-floor apartment, perfectly positioned on the EN1 / Winchmore Hill (N21) border.
Located literally moments from the N21 boundary, this modern property combines the vibrant convenience of local high-street amenities and transport links right on your doorstep with the peaceful green surroundings of a well-maintained purpose-built block.