1/10
£6,750,000
Flat · 3 beds · 3 baths · 2,076 sq ft
South Street, Mayfair, W1K
Leasehold
1/11
1/11
3 bed flat for sale South Street, Mayfair, W1K
Guide Price
£7,500,000
Added on 29/09/2026
Added on 29/09/2026
- Type
- Flat
- Bedrooms
- 3
- Bathrooms
- 3
- Size
- £3,151 per sq ft
- Tenure
- Leasehold
EPC Energy rating band E 41 potential D
Key features
- Concierge
- Lift
- Air Conditioning
About this property
Tucked away behind a distinguished Victorian mansion block, this recently refurbished duplex penthouse offers an exceptional standard of luxury in the heart of Mayfair Village. Spanning the fifth and sixth floors, the residence boasts refined interiors, elegant proportions, and a private terrace with leafy, treetop views.
Floorplan
Energy performance
Energy rating band E 41
Current
Potential
92+
A
81-91
B
69-80
C
55-68
D
Potential rating: 61 D
39-54
E
Current rating: 41 E
21-38
F
1-20
G
This home is rated band E, scoring 41 out of 100. The average British home is band D. Its certificate says it could reach band D (61) if the improvements it recommends were carried out.
Read from the certificate published with this listing, so it may not be the latest one. Check the government EPC register for the full certificate and its recommendations.
Council tax
Ask agent
Per year
- Band A£700
- Band B£816
- Band C£933
- Band D£1,050
- Band E£1,283
- Band F£1,516
- Band G£1,749
- Band H£2,099
The agent hasn't said which band this home is in; you can look it up on GOV.UK. In Westminster, 2026/27 bills run from £700 a year in band A to £2,099 in band H.
Figures from MHCLG (Open Government Licence v3): the average bill for each band across Westminster, including the typical parish precept, so a parish's own bill can differ a little. Discounts lower the bill, such as 25% off for an adult living alone.
Property timeline
- ListedSeptember 2026 £7,500,000
3 beds · 3 baths · this listing
Past sales can't be shown: the agent hasn't given the flat number.
Price guide
100 comparables · within 0.8 milesPriced above 85% of the 3-bed flats for sale nearby right now.
This home, £7,500,000 Median £2,950,000 · £1,790,500 – £10,050,000
Per square foot
£3,151 62% over
3-bed flats nearby £1,950
Against sold prices
21% over
W1K sold median £2,600 / sq ft, 42 sales
Compared with 100 3-bed flats for sale within 0.8 miles, on the market now or already under offer. The range is the middle 80% of their asking prices. Sold prices are HM Land Registry sales in W1K over the last 24 months, per square foot of EPC floor area. All sold £/sq ft in W1K →
Location
South Street, Mayfair, W1K
Mortgage and stamp duty
Property price £7,500,000
£3.8m £11.3m
Deposit10% £750,000
£0 £7.5m
Interest rate 4.5%
0.5% 15%
Repayment period 25 years
5 years 40 years
A £6,750,000 mortgage. Most lenders would want a household income of about £1,500,000 to support it.
A guide only, for a capital repayment mortgage. The rate you are offered and what you can borrow depend on your circumstances and a full application with a lender or broker. Your home may be repossessed if you do not keep up repayments on your mortgage.
Properties sold nearby
HM Land Registry sales nearby. Floor areas from Energy Performance Certificates where matched.
| Address | Type | Sold | Size | Size | £/sq ft | Price |
|---|---|---|---|---|---|---|
| Flat 18, 51, South Street Flat / maisonette | Flat / maisonette | Mar 2026 | 2,616 sq ft £3,288/sq ft | 2,616 sq ft | £3,288 | £8,600,000 |
| Flat 21, 51, South Street Flat / maisonette | Flat / maisonette | Mar 2025 | 2,799 sq ft £2,787/sq ft | 2,799 sq ft | £2,787 | £7,800,000 |
| Flat 19, 51, South Street Flat / maisonette | Flat / maisonette | Dec 2022 | 2,400 sq ft £3,749/sq ft | 2,400 sq ft | £3,749 | £9,000,000 |
| Flat 25, 51, South Street Flat / maisonette | Flat / maisonette | Dec 2019 | 1,475 sq ft £1,204/sq ft | 1,475 sq ft | £1,204 | £1,775,000 |
| Flat 2, 51, South Street Flat / maisonette | Flat / maisonette | Jul 2019 | 2,293 sq ft £3,424/sq ft | 2,293 sq ft | £3,424 | £7,850,000 |
| Flat 22, 51, South Street Flat / maisonette | Flat / maisonette | Mar 2019 | 2,411 sq ft £2,126/sq ft | 2,411 sq ft | £2,126 | £5,125,000 |
| Flat 15, 51, South Street Flat / maisonette | Flat / maisonette | Nov 2014 | 2,723 sq ft £140/sq ft | 2,723 sq ft | £140 | £380,000 |
| Flat 4a, 51, South Street Flat / maisonette | Flat / maisonette | Aug 2013 | 1,066 sq ft £1,548/sq ft | 1,066 sq ft | £1,548 | £1,650,000 |
All sales on South Street → All sold prices in Westminster →
Area insights
The neighbourhood around this property.
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