1/8
£1,150,000
1 bed · 1 bath · 634 sq ft
17 Fitzhardinge House, 12-14 Portman Square, London
0.02 miles
away
Leasehold
Added on 16/09/2026 Foxtons
1/14
1/14
£4,950,000
Asking price 3 bed flat for sale Portman Square, Marylebone, London
3
beds 3
baths Apartment
Leasehold
Added today
About this property
Portman Square is one of Marylebone's most distinguished addresses, and this beautifully refurbished fourth-floor apartment occupies a coveted position within one of the square's landmark Art Deco buildings. Extending to approximately 1,552 sq ft, the residence has been thoughtfully redesigned throughout, pairing generous proportions with bespoke contemporary finishes. Residents benefit from 24-hour porterage, concierge services and key access to the private gardens and tennis courts of Portman Square.
Key features
- 24 Hour porter
Floorplan
Price guide
This home
£3,149 / sq ft
Area average (sold)
£1,495 / sq ft
Price per area, sold homes nearby
£972 / sq ft
£3,149 / sq ft
£2,128 / sq ft
Lowest
This home
Highest
£3,149 per sq ft, above 9 in 10 recent sales in W1H (£972–£2,128, 10th–90th percentile, 119 sales over 24 months).
Lowest and highest are the 10th and 90th percentiles of 119 homes sold in W1H over the last 24 months. This home's figure uses its asking price. All sold £/sq ft in W1H →
Location
Portman Square, Marylebone, London, W1H 6LJ
- Council tax
- Band D (Approx £1,050/year)The agent has not stated the band, so band D is shown as the local reference: Westminster's 2026/27 area average, including the typical parish precept. The actual band and any discounts change the bill.
Mortgage and stamp duty
Property price £4,950,000
£2.5m £7.4m
Deposit10% £495,000
£0 £5m
Interest rate 4.5%
0.5% 15%
Repayment period 25 years
5 years 40 years
A £4,455,000 mortgage. Most lenders would want a household income of about £990,000 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.
Historic sold prices nearby
HM Land Registry sales in W1H 6LJ. Floor areas from Energy Performance Certificates where matched.
| Address | Type | Sold | Size | Size | £/sq ft | Price |
|---|---|---|---|---|---|---|
| Flat 66, 15, Portman Square Flat / maisonette | Flat / maisonette | Oct 2025 | 1,152 sq ft £2,344/sq ft | 1,152 sq ft | £2,344 | £2,700,000 |
| Flat 54, 15, Portman Square Flat / maisonette | Flat / maisonette | Jul 2025 | 1,130 sq ft £1,858/sq ft | 1,130 sq ft | £1,858 | £2,100,000 |
| Flat 3, 15, Portman Square Flat / maisonette | Flat / maisonette | Oct 2023 | 258 sq ft £1,742/sq ft | 258 sq ft | £1,742 | £450,000 |
| Flat 26, 15, Portman Square Flat / maisonette | Flat / maisonette | Jul 2023 | 904 sq ft £2,157/sq ft | 904 sq ft | £2,157 | £1,950,000 |
| Flat 30, 15, Portman Square Flat / maisonette | Flat / maisonette | Jan 2023 | 1,130 sq ft £2,252/sq ft | 1,130 sq ft | £2,252 | £2,545,000 |
| Flat 29, 15, Portman Square Flat / maisonette | Flat / maisonette | Jul 2022 | 1,141 sq ft £1,884/sq ft | 1,141 sq ft | £1,884 | £2,150,000 |
| Flat 37, 15, Portman Square Flat / maisonette | Flat / maisonette | Jul 2022 | 1,550 sq ft £1,290/sq ft | 1,550 sq ft | £1,290 | £2,000,000 |
| Flat 66, 15, Portman Square Flat / maisonette | Flat / maisonette | Feb 2021 | 1,152 sq ft £1,737/sq ft | 1,152 sq ft | £1,737 | £2,000,000 |
All sales on Portman Square → All sold prices in Marylebone →
Area insights
The neighbourhood around this property.
Marketed by
United Kingdom Sotheby's International Realty, Marylebone - United Kingdom Sotheby's International Realty
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