1/15

4 bed flat for sale Onslow Square, South Kensington, SW7

Asking price

£2,750,000

Added on 29/09/2026

Type: Flat
Bedrooms: 4
Bathrooms: 3
Size: £1,571 per sq ft
Tenure: Leasehold

Council tax Band G £2,778 a year

Highlights

From the agent's description

Communal gardens
Lift
Dining room
Home office
Porter

About this property

An impressive four bedroom apartment located on the second floor of a well-regarded portered building in the heart of South Kensington. Extending to approximately 1,749 sq ft, the property offers exceptional lateral space, excellent proportions and an abundance of natural light throughout.

The accommodation is particularly well balanced, centred around a superb reception room with wooden flooring and bay window, which sits adjoined to a separate dining room further enhancing the entertaining space, while the large, modern kitchen is well-appointed and thoughtfully laid out.

Floorplan

Council tax

Band G £2,778 a year

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

This home: £2,778
Band H

£3,333

This home is in band G, which costs £2,778 a year in Kensington and Chelsea for 2026/27.

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. Check a home's band on GOV.UK.

Price guide

100 comparables · within 1.3 miles

Cheaper than 67% of the 4-bed flats for sale nearby right now.

This home, £2,750,000 Median £3,275,000 · £1,675,000 – £9,029,000

Per square foot

£1,571 2% under

4-bed flats nearby £1,611

Against sold prices

10% over

SW7 sold median £1,434 / sq ft, 358 sales

Compared with 100 4-bed flats for sale within 1.3 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 SW7 over the last 24 months, per square foot of EPC floor area. All sold £/sq ft in SW7 →

Location

Onslow Square, South Kensington, SW7

Open map Street View

Mortgage and stamp duty

Property price £2,750,000

£1.4m £4.1m

Deposit10% £275,000

£0 £2.8m

Interest rate 4.5%

0.5% 15%

Repayment period 25 years

5 years 40 years

A £2,475,000 mortgage. Most lenders would want a household income of about £550,000 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 31, Malvern Court, Onslow Square Flat / maisonette	Flat / maisonette	Apr 2025	1,335 sq ft £1,386/sq ft	1,335 sq ft	£1,386	£1,850,000
Flat 45, Malvern Court, Onslow Square Flat / maisonette	Flat / maisonette	Jan 2024	1,389 sq ft £918/sq ft	1,389 sq ft	£918	£1,275,000
Flat 47, Malvern Court, Onslow Square Flat / maisonette	Flat / maisonette	Oct 2023	1,744 sq ft £1,431/sq ft	1,744 sq ft	£1,431	£2,495,000
Flat 32, Malvern Court, Onslow Square Flat / maisonette	Flat / maisonette	Sept 2023	1,787 sq ft £1,203/sq ft	1,787 sq ft	£1,203	£2,150,000
Flat 28, Malvern Court, Onslow Square Flat / maisonette	Flat / maisonette	Aug 2023	1,270 sq ft £1,397/sq ft	1,270 sq ft	£1,397	£1,775,000
Flat 41, Malvern Court, Onslow Square Flat / maisonette	Flat / maisonette	Apr 2023	1,722 sq ft £1,306/sq ft	1,722 sq ft	£1,306	£2,250,000
Flat 27, Malvern Court, Onslow Square Flat / maisonette	Flat / maisonette	Sept 2022	1,518 sq ft £1,647/sq ft	1,518 sq ft	£1,647	£2,500,000
Flat 45, Malvern Court, Onslow Square Flat / maisonette	Flat / maisonette	Mar 2022	1,389 sq ft £252/sq ft	1,389 sq ft	£252	£350,000