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Flat 2, 1 Onslow Gardens, London, SW7 3LX

4 planning records
Property type
End terrace
Floor 1st
Habitable rooms
5
From EPC
Floor area
270 m²
2906 sq ft
Energy rating
C
Score 71
Council tax
Band H
Tenure
Owner Occupied
Overview

About Flat 2

A plain-English summary derived from public records, EPC certificates, sold prices and local data.

Flat 2 is an end-of-terrace house in London (SW7 3LX). It has a recorded floor area of 270 m² (around 2906 sq ft), construction records dating it to before 1900 and council tax band H. At 270 m² this is the largest unit on EPC record across the building (47–270 m²). The building's EPC ratings span E to C, with this unit at the top. On EPC score it ranks first in the building (71 versus a worst of 54). The latest certificate (February 2016) shows a C (score 71). The recommended improvements would push it to B (score 84). The latest certificate is from February 2016, so improvements made since then won't be reflected.

Across 1995–2017, sale prices on this property compounded at 23.3% per year. Today's modelled estimate of £5,703,000 is 52.5% below the 2017 sale of £12,000,000, running counter to the wider postcode trend, which makes the EPC and condition history especially worth a look. On a £-per-square-foot basis, the last sale (£4,129/sq ft) was about 620.5% above the typical sold price in the postcode. At 270 m² the property is well over the postcode median (127 m² across 11 EPCs), placing it in the larger end of the local stock. 4 planning records sit against the property, 2 approved, 2 refused. Past consents include an extension and a conservatory, meaningful when judging how the property has evolved. The record references listed-building consent, which constrain future alterations. 9 years since the last transfer (September 2017).

Before you offer

Know exactly what you're buying at Flat 2

Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.

Already flagged here

Signs of HMO activity in the areaLarger development activity nearby
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Launch offer · save £5

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Valuation

against the asking price

Risks

planning & flood

Sold prices

similar homes nearby

Trends

the local market

Energy

Energy performance

Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.

Flat 2's carbon output runs well above what efficient homes in the postcode produce.

EPC Expired

This certificate is over 10 years old and is no longer valid.Expired 12 Feb 2026

EPC Rating

A
B
C
C71
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Very Poor
CO2 Emissions
7.2 t/year
Occupancy
Owner Occupied
Planning

Planning history

Applications and permits filed against Flat 2, 1 Onslow Gardens, London, SW7 3LX, sourced from the PlanIt planning register.

Flat 2 has multiple listed-building consents on file — alterations need formal heritage approval.

  1. Oct 2020
    RenovationFull
    In report

    Extension of first floor terrace balustrade by 32cm to comply with safety standards: on South and West sides of terrace, installation of grey timber panels with internal metal structure; on North side, installation of light metal structure only, all fixed to interior side of original balustrade.***WITHDRAWN***

    Council
    Thurloe and Smith's Charity
    Listed
    Documents
    17 docs on file
    Reference
    PP/20/04353
    View planning record
  2. Oct 2020
    RenovationHeritage
    In report

    Extension of first floor terrace balustrade by 32cm to comply with safety standards: on South and West sides of terrace, installation of grey timber panels with internal metal structure; on North side, installation of light metal structure only, all fixed to interior side of original balustrade.***WITHDRAWN***

    Council
    Thurloe and Smith's Charity
    Listed
    Documents
    14 docs on file
    Reference
    LB/20/04354
    View planning record
Before you offer

We flagged 2 things worth checking at Flat 2

Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.

  • Signs of HMO activity in the area
  • Larger development activity nearby
£9.99£14.99

30-day money-back guarantee

Price

Sales history & valuation

Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.

Latest sale on Flat 2 was the highest on Land Registry record across the postcode.

Current estimate

£5,703,000

Modelled from EPC, postcode comparables and a sale-price growth of 23.3% per year over 22 years.

See how we calculated this
Last sold (2017)

£12,000,000

Growth on file: 23.3% per year over 22 years.

Sales timeline

  1. 20 September 2017Most recent

    £12,000,000

    +10069.5%over 22 years
  2. 13 August 1995

    £118,000

Median price across the last 5 sales in SW7 3LX: £422,000 (2022–2002).

Before you offerLaunch offer · save £5

Everything we know about Flat 2, in one report

What it's really worth, what could be wrong, and the planning, sales and area data in full.

What we flagged

  • Signs of HMO activity in the area
  • Larger development activity nearby
£9.99£14.99
Trusted by UK homebuyers
Preview of the full property report
On the street

Versus other Onslow Gardens homes

Four headline reads against 11 similar flats on this street, drawn from the latest EPC and Land Registry data.

On price per m², Flat 2 stands well clear of the street.

Price per m²

£44,444

Street avg £12,886

Strongly above

Floor Area

270 m²

Street avg 132 m²

Strongly above

Habitable Rooms

5 rooms

Street avg 4 rooms

Above

CO₂ Emissions

7.2 t/year

Street avg 4.8 t/year

Strongly below
Area

The neighbourhood at a glance

A condensed read of the local area. Each tile links through to the full breakdown on the London district page.

Rail-style transport is unusually close for this postcode.

Crime

10/mo

Rising year-on-year across the wider district.

Nearest stop

0.2 km

Onslow Gardens South Kensington — bus stop.

Closest school

0.3 km

Our Lady of Victories RC Primary School. 61 schools nearby.

Go deeper on the local area

The full report breaks down crime, transport links, schools and air quality in depth.

Noise

Road noise across the postcode

Modelled day and night-time noise levels around SW7 3LX from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime road noise heatmap for SW7 3LX

Daytime· 07:00 – 23:00

59.1dB

Moderate
Night-time road noise heatmap for SW7 3LX

Night-time· 23:00 – 07:00

48.8dB

Low
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4
Map

Everything within walking distance

Schools, transport stops and scenic spots near this property — 91 points of interest in total.
FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about Flat 2, 1 Onslow Gardens, London, SW7 3LX. Each answer is also embedded as structured data for search engines.