1/8
£25,000,000
7 beds · 8 baths · 13,500 sq ft
Lowndes Square, Knightsbridge, London
0 miles
away
Freehold
Added today United Kingdom Sotheby's International Realty
1/2
1/2
£25,000,000
Guide price 10 bed house for sale Lowndes Square, London, SW1X 9HB
10
beds 9
baths House
Freehold
Added on 16/09/2026
About this property
A unique freehold 'key-house' located in Knightsbridge. This development opportunity has planning permission for a magnificent residence with a linked mews house. The existing property is currently laid out as three separate apartments plus a mews house at the rear.
Key features
- A rare development opportunity
- Key building with open westerly aspect towards Sloane Street
- Planning permission to create a combined house and mews house totalling approximately 12,643 sq ft
- Proposed accommodation for 8 reception rooms, 7 principle bedroom suites and 2 staff bedrooms
- Parking, pool, leisure and lift
Location
Lowndes Square, London, SW1X 9HB
- Council tax
- Band H (Approx £2,099/year)Westminster's 2026/27 area average, including the typical parish precept for band H. Your bill may differ: single-person and other discounts may apply.
Mortgage and stamp duty
Property price £25,000,000
£12.5m £37.5m
Deposit10% £2,500,000
£0 £25m
Interest rate 4.5%
0.5% 15%
Repayment period 25 years
5 years 40 years
A £22,500,000 mortgage. Most lenders would want a household income of about £5,000,000 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 SW1X 9HB. Floor areas from Energy Performance Certificates where matched.
| Address | Type | Sold | Size | Size | £/sq ft | Price |
|---|---|---|---|---|---|---|
| 15, Lowndes Square Flat / maisonette | Flat / maisonette | Jul 2020 | 807 sq ft £5,946/sq ft | 807 sq ft | £5,946 | £4,800,000 |
| Flat 4, 11, Lowndes Square Flat / maisonette | Flat / maisonette | Apr 2011 | 1,356 sq ft £1,622/sq ft | 1,356 sq ft | £1,622 | £2,200,000 |
| 15, Lowndes Square Flat / maisonette | Flat / maisonette | Jan 2011 | 807 sq ft £1,734/sq ft | 807 sq ft | £1,734 | £1,400,000 |
| Flat 4, 11, Lowndes Square Flat / maisonette | Flat / maisonette | Feb 2010 | 1,356 sq ft £1,117/sq ft | 1,356 sq ft | £1,117 | £1,515,000 |
| Flat 1, 15, Lowndes Square Flat / maisonette | Flat / maisonette | Aug 2009 | 1,658 sq ft £1,185/sq ft | 1,658 sq ft | £1,185 | £1,965,000 |
| Lower Ground Floor Flat, 11, Lowndes Square Flat / maisonette | Flat / maisonette | Mar 2007 | — | — | — | £775,000 |
| Flat 1, 11, Lowndes Square Flat / maisonette | Flat / maisonette | Mar 2007 | 2,594 sq ft £549/sq ft | 2,594 sq ft | £549 | £1,425,000 |
| Basement And Ground Floor Flat, 19, Lowndes Square Flat / maisonette | Flat / maisonette | Nov 2006 | 2,831 sq ft £1,016/sq ft | 2,831 sq ft | £1,016 | £2,875,000 |
All sales on Lowndes Square → All sold prices in Westminster →
Area insights
The neighbourhood around this property.
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