-7.9% 5y IRR — capital outlay disproportionate to returns
Property research tool — not a regulated financial service. Numbers are point-in-time estimates; how we decide →
Monthly cashflow
−£1K/mo
You top up £1K/mo
Price
£525K
No local sold comps to compare
Return · IRR
-7.9%/yr
Loses money over 5 years
Cash to get in
£201K
Deposit + fees + refurb
Return before costson price · Rent by the room4.62%5-yr return on cash -30%Rent est. £1,614 (£1,613–£1,615)
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
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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: £1,613–£1,615/mo · n=5
Financing
DepositYour cash in — the rest is the mortgage25% · £131,250
5%100% (cash buy)
Standard 75% LTV for BTL
Mortgage rate5y fixed5.5%
3.0%9.0%
5-year fixed (market average) — 5.50% (as of 2026-05).
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 (£11,333–£21,155 range), VAT-inclusive
Legal + survey (£)
Leasehold house — £2,375 legal + £1,000 survey
Mortgage fees (£)
2% product fee on £393,750 loan + £1,000 booking fee
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)£201,111
Green = verified data. Amber = market typical. Red = our estimate — verify before offering.
About this propertydescription · onthemarket
Description& agent copyOnTheMarket
SUMMARY
A simply stunning three-bedroom penthouse apartment set within an exclusive gated development in Sovereign Harbour South. Enjoying panoramic harbour, sea and South Downs views.
DESCRIPTION
*COMING SOON* A truly stunning three-bedroom penthouse apartment, enviably positioned within an exclusive gated development in Sovereign Harbour South and boasting breathtaking panoramic views across the harbour, outer harbour, the sea and towards the South Downs.
3.69% Return before costs — around the area average for this property type.
Monthly profit −£1,136/mo at the default 25% deposit @ 5.5% — open the calculator to stress-test.
Price
£525K
Return before costs (best)
4.62%
Rent by the room
Bedrooms
3
3 bath
Energy rating
—
Energy rating
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What-if calculator
Edit any input — outputs recalc live
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: £1,613–£1,615/mo · n=5
Financing
DepositYour cash in — the rest is the mortgage25% · £131,250
5%100% (cash buy)
Standard 75% LTV for BTL
Mortgage rate5y fixed5.5%
3.0%9.0%
5-year fixed (market average) — 5.50% (as of 2026-05).
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 (£11,333–£21,155 range), VAT-inclusive
Legal + survey (£)
Leasehold house — £2,375 legal + £1,000 survey
Mortgage fees (£)
2% product fee on £393,750 loan + £1,000 booking fee
Short-let (SA) context243 active short-lets nearby
Short-let market context
Local nightly-rate and occupancy benchmarks for this postcode.
243 active short-let listings in this postcode
Year-by-year Monthly profit (5-yr horizon)
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
£19,368
£7,646
£24,609
£0
£0
-£12,888
-£12,888
Year 2
£19,949
£7,876
£24,609
£0
£0
-£12,536
-£25,423
Year 3
£20,548
£8,112
£24,609
£0
£0
-£12,174
-£37,597
Year 4
£21,164
£8,355
£24,609
£0
£0
-£11,801
-£49,398
Year 5
£21,799
£8,606
£24,609
£0
£0
-£11,416
-£60,814
Rent by the roomupside
Tap to expand
Rent by the room conversion upside—▾
Required
Rooms (3+)3 bd
Conversion£26,000
If converted
Gross / mo£2,021
Gross Rent by the room yield4.62%
What we verified
12 total
4106
Legal & planning4▾
Article 4HMO restriction lookupUnknown
Rent by the room licensingMandatory if 5+ unrelatedCheck LPA
TenureTenure typeLeasehold
HeritageListed building / conservation areaNot stated on the listing
Building condition3▾
EPCPostcode estimate — check the registerNot stated on the listing
EWS1External wall safety (cladding)Not stated on the listing
Refurb costBased on beds + baths + sqftEstimate available
Area3▾
Crimepolice.uk · monthlyChecking…
SchoolsGIAS · OfstedNo postcode
FloodEA Flood Map · England onlyChecking…
Investor profile2▾
Tenant profileBeds + postcode heuristicFamily / Rent by the room
Rent by the room feasibilityMin 3 beds for C4 routeFeasible
Comparables
sold within 0.5 mi
Loading nearby sold…
Location & transport
Score 90/100
Loading map…
PropertySchoolsUniversitiesStationsArticle 4
Transport detail not loaded for this property.
Tax & exit
Ltd Co
Tax bandLtd Co 25%
Mortgage-interest tax rule credit£4,922
Annual rental tax£0
CGT yr 5£0 · company level
5y net total-£60,814
Acquisition costs
£201K
25% deposit£131,250
Stamp duty£42,500
Refurb£15,111
Legal + survey£3,375
Mortgage + broker£8,875
Cash needed£201,111
Green = verified data. Amber = market typical. Red = our estimate — verify before offering.
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Description& agent copyOnTheMarket
SUMMARY
A simply stunning three-bedroom penthouse apartment set within an exclusive gated development in Sovereign Harbour South. Enjoying panoramic harbour, sea and South Downs views.
DESCRIPTION
*COMING SOON* A truly stunning three-bedroom penthouse apartment, enviably positioned within an exclusive gated development in Sovereign Harbour South and boasting breathtaking panoramic views across the harbour, outer harbour, the sea and towards the South Downs.