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PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Basil Street, LONDON, SW3 1AR

Introduction

Energy Performance Certificates (EPCs) are designed to tell you how efficient a building is and provides a rating between A (very efficient) and G which is inefficient. It helps to identify how costly it will be to light and heat a property and what the carbon dioxide emissions are likely to be.

An EPC needs to be provided as part of the process of selling or renting a house and should be availale as soon as the property is marketed. An EPC may only be produced by an approved domestic energy assessor and each certificate is valid for 10 years.

Additionally, an EPC will highlight potential efficiency improvements that could be made to the property, an estimated cost for implementation and the likely savings that can be made as a result. These costs and savings are for a typical household in that property and not specific to you or your family.

Certificates issued for Basil Street, SW3 1AR are shown below and the data are updated monthly for England and Wales and quarterly for properties in Scotland.

Data are provided by the Department for Levelling Up, Housing and Communities.

Energy Performance Certificates Generated for Basil Street, LONDON, SW3 1AR
Period Covered: 2008 - 31 January 2025

Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
Flat 1, Washington House
Date
15 Aug 2022
Current
Potential
58
73
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1930-1949
+
Certificate History
15 Aug 2022
58
73
Total Floor Area
145 sq m
Current CO2 Emissions Level
5.9
Potential CO2 Emissions Level
3.3
CO2 per sq m per Year
41
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
Flat 1 Washington House, Basil Street
Date
10 Feb 2012
Current
Potential
64
65
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
+
Certificate History
10 Feb 2012
64
65
24 May 2010
60
70
Total Floor Area
146 sq m
Current CO2 Emissions Level
5.8
Potential CO2 Emissions Level
5.6
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
Flat 11 Washington House, Basil Street
Date
26 Oct 2009
Current
Potential
65
69
Property Type
Maisonette
Built Form
N/A
Constructed
N/A
+
Certificate History
26 Oct 2009
65
69
Total Floor Area
211 sq m
Current CO2 Emissions Level
7.5
Potential CO2 Emissions Level
6.9
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
1
Address
Flat 12, Washington House
Date
15 May 2024
Current
Potential
39
63
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
+
Certificate History
15 May 2024
39
63
8 Jan 2013
54
62
Total Floor Area
215 sq m
Current CO2 Emissions Level
13.0
Potential CO2 Emissions Level
7.6
CO2 per sq m per Year
61
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
FLAT 2, WASHINGTON HOUSE
Date
14 Jul 2021
Current
Potential
71
81
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
+
Certificate History
14 Jul 2021
71
81
Total Floor Area
149 sq m
Current CO2 Emissions Level
4.2
Potential CO2 Emissions Level
2.5
CO2 per sq m per Year
29
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
Flat 2 Washington House, Basil Street
Date
6 Sep 2010
Current
Potential
67
69
Property Type
Flat
Built Form
Detached
Constructed
before 1900
+
Certificate History
6 Sep 2010
67
69
29 Apr 2009
48
55
Total Floor Area
147 sq m
Current CO2 Emissions Level
4.8
Potential CO2 Emissions Level
4.7
CO2 per sq m per Year
33
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
Flat 4 Washington House, Basil Street
Date
12 Jun 2017
Current
Potential
82
82
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
+
Certificate History
12 Jun 2017
82
82
19 Jul 2011
72
73
9 Jun 2009
44
46
Total Floor Area
186 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
2.8
CO2 per sq m per Year
15
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
Flat 5, Washington House
Date
15 Jan 2020
Current
Potential
70
82
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
+
Certificate History
15 Jan 2020
70
82
Total Floor Area
160 sq m
Current CO2 Emissions Level
4.6
Potential CO2 Emissions Level
2.5
CO2 per sq m per Year
29
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
Flat 6, Washington House
Date
9 Nov 2015
Current
Potential
79
87
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
+
Certificate History
9 Nov 2015
79
87
Total Floor Area
163 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
18
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
Flat 9 Washington House, Basil Street
Date
28 Oct 2008
Current
Potential
64
76
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
+
Certificate History
28 Oct 2008
64
76
Total Floor Area
150 sq m
Current CO2 Emissions Level
5.9
Potential CO2 Emissions Level
4.1
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Bands

A
92 - 100
B
81 - 91
C
69 - 80
D
55 -68
E
39 -54
F
54 -38
G
0 - 20

Energy Performance Certificate Notes

There are a number of reasons that certificates are excluded from the dataset;

  • The holder of the energy certificate has 'opted-out' of disclosure
  • The certificate is excluded on the grounds of national security
  • Certificates that are marked as 'cancelled' or 'not for issue'

Certificates are grouped together by the property reference identifier rather than the postal address with a view to showing the history of changes made to properties over time. Sometimes, one property may exist as multiple entries in the table instead and this is as a result of inconsistent building references being used on each prepared certificate.

Contains public sector information licensed under the Open Government Licence v3.0.
Contains Royal Mail data © Royal Mail copyright and Database right 2025.