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3 bed flat for sale Onslow Gardens, South Kensington, SW7

Asking price

£2,550,000

Added on 02/10/2026

Type: Flat
Bedrooms: 3
Bathrooms: 3
Size: £1,628 per sq ft
Tenure: Leasehold

Key features

Charming Three Bedroom Flat
Large Reception Room with Open Plan Kitchen
Split Level Apartment
Outside Patio
Bright & Spacious
Nearby South Kensington & Gloucester Road Station

About this property

Nestled on one of South Kensington’s most prestigious garden squares, this exceptional three-bedroom duplex apartment offers elegant living in an enviable location. Positioned on the ground floor of a striking stucco-fronted period building, the property benefits from a private, secluded patio, creating a peaceful outdoor retreat in the heart of the city.

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 0.6 miles

Priced above 62% of the 3-bed flats for sale nearby right now.

This home, £2,550,000 Median £2,222,500 · £1,181,500 – £3,770,000

Per square foot

£1,628 9% over

3-bed flats nearby £1,489

Against sold prices

14% over

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

Compared with 100 3-bed flats for sale within 0.6 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 Gardens, South Kensington, SW7

Open map Street View

Mortgage and stamp duty

Property price £2,550,000

£1.3m £3.8m

Deposit10% £255,000

£0 £2.6m

Interest rate 4.5%

0.5% 15%

Repayment period 25 years

5 years 40 years

A £2,295,000 mortgage. Most lenders would want a household income of about £510,000 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 3, 26, Onslow Gardens Flat / maisonette	Flat / maisonette	Mar 2025	1,496 sq ft £2,339/sq ft	1,496 sq ft	£2,339	£3,500,000
Flat 6, 28, Onslow Gardens Flat / maisonette	Flat / maisonette	Jun 2021	355 sq ft £1,013/sq ft	355 sq ft	£1,013	£360,000
Flat 3, 29, Onslow Gardens Flat / maisonette	Flat / maisonette	Nov 2020	n/a	n/a	n/a	£2,350,000
Flat 6, 28, Onslow Gardens Flat / maisonette	Flat / maisonette	Sept 2017	355 sq ft £1,196/sq ft	355 sq ft	£1,196	£425,000
Flat 1, 28, Onslow Gardens Flat / maisonette	Flat / maisonette	Sept 2017	1,399 sq ft £1,461/sq ft	1,399 sq ft	£1,461	£2,045,000
Flat 4, 28, Onslow Gardens Flat / maisonette	Flat / maisonette	Jul 2017	657 sq ft £747/sq ft	657 sq ft	£747	£490,500
Flat 6, 27, Onslow Gardens Flat / maisonette	Flat / maisonette	Oct 2015	334 sq ft £1,858/sq ft	334 sq ft	£1,858	£620,000
4, 28, Onslow Gardens Flat / maisonette	Flat / maisonette	Jul 2012	657 sq ft £1,093/sq ft	657 sq ft	£1,093	£717,500