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3 bed flat for sale Brompton Square, Knightsbridge, SW3

Guide Price

£3,150,000

Added on 10/10/2026

Type: Flat
Bedrooms: 3
Bathrooms: 2
Size: £2,237 per sq ft
Tenure: Leasehold

Key features

Air Conditioning

About this property

Set within the widest Georgian townhouse on Brompton Square, this exceptional upper duplex has been newly renovated to an excellent standard throughout, creating an elegant turnkey home in one of Knightsbridge’s most prestigious garden squares.

Arranged across the upper floors, the accommodation comprises three double bedrooms, with the third providing flexibility for use as a home office or occasional guest room. Two beautifully finished bathrooms are complemented by a separate powder room, with the interiors presented in immaculate condition throughout.

Floorplan

Council tax

Ask agent

Per year

Band A

£1,111
Band B

£1,296
Band C

£1,481
Band D

£1,667
Band E

£2,037
Band F

£2,407
Band G

£2,778
Band H

£3,333

The agent hasn't said which band this home is in; you can look it up on GOV.UK. In Kensington and Chelsea, 2026/27 bills run from £1,111 a year in band A to £3,333 in band H.

Figures from MHCLG (Open Government Licence v3): the average bill for each band across Kensington and Chelsea, 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.

Price guide

100 comparables · within 0.5 miles

Priced above 68% of the 3-bed flats for sale nearby right now.

This home, £3,150,000 Median £2,775,000 · £1,400,000 – £6,500,000

Per square foot

£2,237 20% over

3-bed flats nearby £1,863

Against sold prices

44% over

SW3 sold median £1,559 / sq ft, 491 sales

Compared with 100 3-bed flats for sale within 0.5 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 SW3 over the last 24 months, per square foot of EPC floor area. All sold £/sq ft in SW3 →

Location

Brompton Square, Knightsbridge, SW3

Open map Street View

Mortgage and stamp duty

Property price £3,150,000

£1.6m £4.7m

Deposit10% £315,000

£0 £3.2m

Interest rate 4.5%

0.5% 15%

Repayment period 25 years

5 years 40 years

A £2,835,000 mortgage. Most lenders would want a household income of about £630,000 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
15, Brompton Square Terraced	Terraced	Nov 2022	3,466 sq ft £3,462/sq ft	3,466 sq ft	£3,462	£12,000,000
24, Brompton Square Terraced	Terraced	Apr 2022	2,777 sq ft £2,251/sq ft	2,777 sq ft	£2,251	£6,250,000
16, Brompton Square Terraced	Terraced	Apr 2021	3,337 sq ft £1,918/sq ft	3,337 sq ft	£1,918	£6,400,000
19, Brompton Square Terraced	Terraced	Apr 2020	5,985 sq ft £2,977/sq ft	5,985 sq ft	£2,977	£17,818,089
23, Brompton Square Terraced	Terraced	Jan 2020	n/a	n/a	n/a	£6,500,000
Flat 5, 26, Brompton Square Flat / maisonette	Flat / maisonette	Aug 2018	1,055 sq ft £2,654/sq ft	1,055 sq ft	£2,654	£2,800,000
Flat 4, 26, Brompton Square Flat / maisonette	Flat / maisonette	Jun 2014	n/a	n/a	n/a	£949,000
Lower Ground Floor Flat, 27, Brompton Square Flat / maisonette	Flat / maisonette	May 2014	n/a	n/a	n/a	£1,089,000