Monthly profit +£516/mo from completion — the no.1 reason to invest
12.87% return before costs — above-market
10.4% Rent by the room return before costs (net 5.68% after CapEx + bills) — conversion play
7.4% 5y IRR — strong total return on capital
Why to be cautious
EPC E — must hit C by 2030 (~£6,000–£12,000)
Leasehold 99yr — verify at solicitor
Service charge unknown — could swing £100-300/mo
Property research tool — not a regulated financial service. Numbers are point-in-time estimates; how we decide →
Monthly cashflow
+£516/mo
Pays you every month, net of costs
Price
£220K
No local sold comps to compare
Return · IRR
7.4%/yr
Modest annualised return
Cash to get in
£92K
Deposit + fees + refurb
Return before costson price12.87%5-yr return on cash 44%Rent est. £2,359 (£1,878–£2,963)
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: £1,878–£2,963/mo · n=19
Financing
DepositYour cash in — the rest is the mortgage25% · £55,000
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 (£13,681–£25,537 range), VAT-inclusive
Legal + survey (£)
Leasehold flat — £1,500 legal + £500 survey
Mortgage fees (£)
2% product fee on £165,000 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
£28,308
£8,843
£10,725
£0
£1,661
£7,079
£7,079
Year 2
£29,157
£9,108
£10,725
£0
£1,772
£7,552
£14,631
Year 3
£30,032
£9,382
£10,725
£0
£1,886
£8,039
£22,670
Year 4
£30,933
£9,663
£10,725
£0
£2,003
£8,542
£31,211
Year 5
£31,861
£9,953
£10,725
£0
£2,125
£9,058
£40,269
Year 5 disposal
Disposal gain (gross)-£16,316
CGT£0
Net Disposal proceeds£236,825
What we verified
What we verified
12 total · click to expand
33063 ok · 3 caution · 0 fail · 6 unknown
Legal & planning
Leasehold99 yrTenure & planning99 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 approvable71% likely
Confidence: low
•Article 4 direction applies — planning permission required for C3->C4 HMO
•no known HMOs within 40m (below threshold)
•local council HMO approval rate 71% (187 decisions)
•this council refuses HMOs that would sandwich a family home between two HMOs — check both adjoining properties
•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 40 m vs 10% policy
Rent by the room restriction
C3 to C4 conversion
Unknown
Confidence
low
Source
No LPA data for this prefix
Rates as of May 2026
Building condition
Energy ratingE
EPC& 2030 deadlineEPC register
▼
ABCDEFG
Current rating
From listing description
Band E
MEES 2030 compliance
C required for new tenancies
FAIL
Upgrade to C
estimated cost
£6k–£12k
EPC band from listing · verify certificate before exchanging
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)£92,441
Green = verified data. Amber = market typical. Red = our estimate — verify before offering.
About this propertydescription · onthemarket
Description& agent copyOnTheMarket
CHAIN FREE
* Duplex Penthouse Apartment * Ocean Village Location * Three Balconies * Three Bedrooms * Under Croft Parking * Chain Free *
Set within the highly sought-after Charter House development on the fringes of Ocean Village, this exceptionally spacious three-bedroom penthouse apartment offers an impressive arrangement of accommodation across both the sixth and seventh floors, enjoying elevated southerly views towards Southampton waterside.
Charter House, 85 Canute Road, Southampton, Hampshire, SO14, Southampton, SO14
flat · 3 bed · 2 bath · 1,302 sqft
£220,000
est £2,359 · 12.87% gross
Chain freeLeasehold 99yrEPC E
1 / 5
80/100
Strong
12.87% — verify the rent + comps locally.
Monthly profit+£516/mo at 25% deposit @ 5.5%
Stress Rent-covers-mortgage check PASS at 6.5% rate stress
12.87% Return before costs — above-market
10.4% Rent by the roomReturn before costs — conversion play
Energy rating E — Min. energy standard blocker by 2030 (~£6,000–£12,000 upgrade)
Price
£220K
Return before costs
12.87%
est rent £2,359/mo19 comps within 1.5 kmRange £1,878–£2,963/mo (Q1–Q3)
Bedrooms
3
2 bath
Energy rating
E
MEES (Minimum Energy Efficiency Standards) blocker by 2030 ~£6,000–£12,000 upgrade
Deal flags1 issue
EPC E — upgrade by 2030
Must reach EPC C by 2030 to let on a new tenancy
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: £1,878–£2,963/mo · n=19
Financing
DepositYour cash in — the rest is the mortgage25% · £55,000
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 (£13,681–£25,537 range), VAT-inclusive
Legal + survey (£)
Leasehold flat — £1,500 legal + £500 survey
Mortgage fees (£)
2% product fee on £165,000 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
£28,308
£8,843
£10,725
£0
£1,661
£7,079
£7,079
Year 2
£29,157
£9,108
£10,725
£0
£1,772
£7,552
£14,631
Year 3
£30,032
£9,382
£10,725
£0
£1,886
£8,039
£22,670
Year 4
£30,933
£9,663
£10,725
£0
£2,003
£8,542
£31,211
Year 5
£31,861
£9,953
£10,725
£0
£2,125
£9,058
£40,269
Rent by the roomupside
Tap to expand
Rent by the room conversion upside+27.1 pp▾
Required
Rooms (3+)3 bd
Conversion£26,000
If converted
Gross / mo£1,906
Gross Rent by the room yield10.40%
What we verified
12 total
4116
Legal & planning4▾
Article 4HMO restriction lookupUnknown
Rent by the room licensingMandatory if 5+ unrelatedCheck LPA
TenureLeasehold years remaining99 yr
HeritageListed building / conservation areaNot stated on the listing
Building condition3▾
EPC~£6,000–£12,000 to upgrade to CE
EWS1External wall safety (cladding)Not stated on the listing
Refurb costBased on beds + baths + sqftEstimate available
Area3▾
Crimepolice.uk · monthlyChecking…
SchoolsGIAS · OfstedChecking…
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 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£2,145
Annual rental tax£1,454
CGT yr 5£0 · company level
5y net total£40,269
Acquisition costs
£92K
25% deposit£55,000
Stamp duty£12,900
Refurb£18,241
Legal + survey£2,000
Mortgage + broker£4,300
Cash needed£92,441
Green = verified data. Amber = market typical. Red = our estimate — verify before offering.
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Description& agent copyOnTheMarket
CHAIN FREE
* Duplex Penthouse Apartment * Ocean Village Location * Three Balconies * Three Bedrooms * Under Croft Parking * Chain Free *
Set within the highly sought-after Charter House development on the fringes of Ocean Village, this exceptionally spacious three-bedroom penthouse apartment offers an impressive arrangement of accommodation across both the sixth and seventh floors, enjoying elevated southerly views towards Southampton waterside.