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Martell Road, Dulwich, London, SE21

Apartment · 1 bed

£275,000
Score: 9.5/10 -37% vs median

Supports major UK property portals

vs Benchmark
-37%
below Sector Median
Est. £/sqft
£396
benchmark £619/sqft
Investment Score
9.5/10
strong opportunity
Days on Market
51
days listed

Suggested Offer Range

Low offer
£261,250
£13,750 below asking
Target offer
£266,750
£8,250 below asking
High offer
£275,000
At asking price

Already 40.0% below the comparable sales mean — limited negotiation margin. Strong value at current asking price.

Suggested range is based on Land Registry median data and is not financial advice. Always conduct your own due diligence.
📷 No photos available for condition analysis.

Property Details

Asking Price
£275,000
Property Type
Apartment
Bedrooms
1
Bathrooms
N/A
Floor Area
466 sqft
Article 4 Area
✓ No restriction — SA permitted under PD rights
-37.4% vs Sector Median (n=133 sales)

This listing is priced below the postcode sector benchmark.

Motivated Seller Analysis

Standard — 2/10

Behavioural signals: Below market value

💸 Mortgage & Financing

Recommended LTV75.0%
Indicative Rate4.99%
Monthly IO Payment£858
ICR (actual)2.11x
FeasibilityPASS
💲 Total Cash Required
Purchase Price£275,000
Deposit (25% — 75% LTV)£68,750
SDLT (additional property, 5% surcharge)£17,500
Legal fees (est.)£1,500
Survey (est.)£500
Arrangement fee (est.)£999
Total cash required£89,249

Legal and survey fees are estimates. SDLT applies 5% additional-property surcharge (Oct 2024 Budget). Not financial advice.

🔄 BRR Refinance Stress Test

✓ Passes stress test Rent covers 1.9x monthly interest — lender likely to approve.
Purchase price £275,000 Loan (75% LTV) £206,250
Rate (IO) 5.5% p.a. Monthly interest £945
Rent needed (1.5×) £1,418/mo Estimated rent £1,809/mo
Stress ratio 1.91× (need ≥ 1.5×) +£391 surplus

Assumptions: 75% LTV · 5.5% interest only · 1.5× rent coverage (standard lender requirement). Actual lender criteria vary — verify with your broker.

Exit Strategy

Capital appreciation projections at 2.5% pa (local Land Registry HPI). Assumes 75% LTV interest-only mortgage redeemed on sale. Excludes rental income.

BRRR Strategy
? Score Photos
Est. reno costUnknown — score listing
Cash left in dealUnknown
R2SA / SA Strategy
⚠ Review
SA gross/mo£1,771
SA net/mo£1,408
BTL est./mo£1,808
SA vs BTL uplift£-37/mo
Hold Period Est. Sale Price Capital Gain Net Proceeds Total Return
3 years £296,145 +£21,145 £79,598 +£10,848 (3.9%)
5 years £311,137 +£36,137 £90,767 +£22,017 (8.0%)
7 years £326,889 +£51,889 £102,502 +£33,752 (12.3%)
Break-even Horizon
46 months
Medium-term (3–5 years)
Flip Viability
Viable
Comp median: £367,000 — margin: +£92,000

Projections: 2.5% pa HPI, 75% LTV IO mortgage redeemed at sale, 1.5% EA, £1,500 legal, 24% CGT above £3k allowance. Not financial advice.

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Location

Subject property Planning applications

Comparable Sales in SE21 8

Address Type Beds Price £/sqft Date Distance
61B, ROSENDALE ROAD, SE21 8DY Flat 3 £850,000 £718 13/03/26 < 0.1 mi
61B, ROSENDALE ROAD, SE21 8DY Flat 3 £850,000 £718 13/03/26 < 0.1 mi
FLAT 1, 21, ST FAITHS ROAD, SE21 8JD Flat 2 £569,000 £876 12/03/26 0.67 mi
FLAT 3, 47, ROSENDALE ROAD, SE21 8DY Flat 1 £367,000 £710 12/03/26 < 0.1 mi
FLAT 3, 47, ROSENDALE ROAD, SE21 8DY Flat 1 £367,000 £710 12/03/26 < 0.1 mi
79D, ROSENDALE ROAD, SE21 8EZ Flat 1 £350,000 £723 06/03/26 0.18 mi
79D, ROSENDALE ROAD, SE21 8EZ Flat 1 £350,000 £723 06/03/26 0.18 mi
APARTMENT 5, 99, THURLOW PARK ROAD, SE21 8JL Flat 3 £182,000 £152 20/02/26 0.42 mi
8, CEDAR CLOSE, SE21 8HX Flat 0 £133,600 £318 19/02/26 0.45 mi
76B, PARK HALL ROAD, SE21 8BW Flat 3 £565,000 £577 16/02/26 0.22 mi

Above subject   Below subject

Based on 10 comparable sales — Full Range (grey) · Typical IQR (blue) · Fair Value CI (light blue) · | Median · | Mean · Asking (▲)

⚠ Low Confidence Valuation — Wide Price Variance
CV = 51.3% (threshold: 40%). Comparable prices in SE21 8 vary widely. This benchmark may not reliably represent this property’s value. Consider an independent RICS valuation before proceeding.

ⓘ Bedroom counts are not available from Land Registry records. Comparables are matched by postcode sector and property type only.

📈 Rental Yield & ROI Forecast

Compound-growth projection: 2.5% annual rent growth + 3% capital growth. IO mortgage throughout. For illustration only.

10-Year Projection
Break-even: Year 1 5yr IRR: 7.7%
Year Est. Rent/yr Est. Value Net Income/yr Cum. Cashflow Total Return ROI on Cash Invested
Yr 1 £21,698 £283,250 £15,177 £4,865 £13,115 14.5%
Yr 3 £22,796 £300,500 £15,968 £15,776 £41,275 45.7%
Yr 5 £23,950 £318,800 £16,799 £28,328 £72,128 79.8%
Yr 10 £27,097 £369,577 £19,065 £67,446 £162,023 179.3%
Yr 15 £30,658 £428,441 £21,629 £118,774 £272,215 301.3%
Yr 20 £34,687 £496,681 £24,529 £183,914 £405,594 448.9%
Yr 25 £39,245 £575,789 £27,811 £264,682 £565,471 625.9%
Yr 30 £44,402 £667,497 £31,524 £363,132 £755,629 836.3%

ROI on Total Cash Invested (deposit + SDLT + acquisition costs). Assumes IO mortgage, no tax, no refinancing. Actual returns will vary.

Planning Applications Nearby (within 0.5 miles)

26/01650/FUL 0.19 mi

Erection of a first-floor rear extension, mansard roof extension, loft conversion and installation of two roof lights to

195 Gipsy Road London Lambeth SE27 9QY

Undecided
26/01672/FUL 0.2 mi

Replacement of the existing roof terrace enclosure/balustrade with fixed privacy screening panels, together with associa

18 Tritton Road London SE21 8DE

Undecided
26/AP/1793 0.35 mi

Removal of Condition 4 Landscaping Scheme full planning application 23/AP/3087 dated 13/03/2024 for Enlargement of exist

1 Alleyn Road London Southwark SE21 8AB

Undecided
26/01723/NMC 0.41 mi

Application for a Non-Material Amendment Following a Grant of Planning Permission ref: 26/00920/FUL (Erection of a singl

48 Park Hall Road London Lambeth SE21 8BW

Undecided
26/01718/LDCP 0.48 mi

Certificate of Lawful Development (Proposed) for the change of use from a single dwelling (Class C3) to a care home for

89 Elder Road London Lambeth SE27 9NB

Undecided

View all planning applications on your dashboard →

Approved   Pending   Refused

🌎 Area Profile — SE21 8 ⓘ What are deciles?

IMD (Overall)
5/10
Mid deprivation
Crime
7/10
Low deprivation
Income
5/10
Mid deprivation
Employment
5/10
Mid deprivation
Education
7/10
Low deprivation
Housing Barriers
4/10
Mid deprivation
Rural/Urban
Mixed

📊 Investment Skill Analysis

Net Yield
5.5%
Gross:7.9%
Mortgage
PASS
75% LTV · 5.0% rate
Survey Risk
Low Risk
Score: 1/10
SDLT (Additional)
£17,500
6.4% effective rate · Company: £17,500
Void Risk
Medium
~5 weeks/year
Statistical CI (65%)
£381,130 –£535,590
vs Comparable Mean:-40.0%· n=10
Best Strategy
AST (Standard BTL)
£1,296/mo
📊 SE21 market data →
SPV Tax Saving
£3,666/yr
Breakeven: — years
5-Year IRR
7.7%
IRR — Moderate

Scenario Analysis

Scenario Monthly Rent Gross Yield Net Yield Cashflow/mo IRR 5yr
Bear £1,538 6.7% 4.2% £-155 -7.0%
Conservative £1,682 7.3% 5.0% £195 3.3%
Base £1,809 7.9% 5.5% £406 7.7%
Optimistic £1,954 8.5% 6.1% £635 12.8%
Bull £2,135 9.3% 6.9% £898 19.3%

Detailed Analysis

💸 Yield & Returns
Gross Yield7.89%
Net Yield5.52%
Net Annual Income£15,185
Deductions: void 8% (−£1,736)  ·  mgmt 10% (−£2,170)  ·  maint 10% (−£2,170)  ·  fixed costs ins.+gas+EPC (−£445)
Monthly IO Mortgage£858
Monthly Cashflow (IO)£407
Cash-on-Cash Return5.39%
5-Year IRR7.7%

Above benchmark   Near benchmark   Below benchmark

💰 Tax Analysis
SDLT (Additional Property)£17,500
SDLT Effective Rate6.36%
SDLT (Company)£17,500
Section 24 Extra Tax/yr (higher rate)£2,063
SPV Annual Saving£3,666
SPV Breakeven— yrs
CGT Projected Sale (5yr)£318,800
Less: Purchase Price−£275,000
Less: Buying Costs (SDLT + legal)−£20,100
Less: Selling Costs (est. 2.5%)−£7,970
= CGT Net Gain (5yr)£15,730
CGT at 24%£3,055
📈 Scenario Analysis
Scenario Monthly Rent Gross Yield Net Yield Cashflow/mo IRR 5yr
Bear £1,538 6.7% 4.2% £-155 -7.0%
Conservative £1,682 7.3% 5.0% £195 3.3%
Base £1,809 7.9% 5.5% £406 7.7%
Optimistic £1,954 8.5% 6.1% £635 12.8%
Bull £2,135 9.3% 6.9% £898 19.3%
📊 Analysis Report (PDF) 📊 Download CSV
PropertyAlert.uk is not affiliated with any property portal. Analysis is based on publicly available Land Registry data and EPC certificates. This report is for informational purposes only and does not constitute financial advice. Analyse another property →

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