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PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Mortimer Square, LONDON, W11 4BY

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 Mortimer Square, W11 4BY 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 Mortimer Square, LONDON, W11 4BY
Period Covered: 2008 - 31 January 2025

Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
1 Mortimer Square
Date
19 Jul 2009
Current
Potential
34
44
Property Type
Flat
Built Form
Semi-Detached
Constructed
before 1900
+
Certificate History
19 Jul 2009
34
44
Total Floor Area
59 sq m
Current CO2 Emissions Level
6.9
Potential CO2 Emissions Level
5.7
CO2 per sq m per Year
116
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
1a Mortimer Square
Date
19 Mar 2018
Current
Potential
59
72
Property Type
Flat
Built Form
End-Terrace
Constructed
1900-1929
+
Certificate History
19 Mar 2018
59
72
Total Floor Area
63 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
53
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
1
Address
2a Mortimer Square
Date
18 Jul 2019
Current
Potential
66
71
Property Type
Flat
Built Form
End-Terrace
Constructed
1900-1929
+
Certificate History
18 Jul 2019
66
71
Total Floor Area
60 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
42
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
2
Address
3 Mortimer Square
Date
3 Apr 2014
Current
Potential
68
72
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1930-1949
+
Certificate History
3 Apr 2014
68
72
8 Jun 2011
65
73
24 Mar 2009
43
59
Total Floor Area
73 sq m
Current CO2 Emissions Level
2.7
Potential CO2 Emissions Level
2.3
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
4 Mortimer Square
Date
29 Nov 2023
Current
Potential
72
83
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
+
Certificate History
29 Nov 2023
72
83
Total Floor Area
136 sq m
Current CO2 Emissions Level
3.7
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
27
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
4
Address
5a Mortimer Square
Date
21 May 2018
Current
Potential
80
80
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
+
Certificate History
21 May 2018
80
80
Total Floor Area
56 sq m
Current CO2 Emissions Level
1.1
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
20
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
5b Mortimer Square
Date
24 Mar 2014
Current
Potential
77
79
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1967-1975
+
Certificate History
24 Mar 2014
77
79
Total Floor Area
62 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
25
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
6 Mortimer Square
Date
11 Feb 2022
Current
Potential
42
73
Property Type
House
Built Form
End-Terrace
Constructed
1930-1949
+
Certificate History
11 Feb 2022
42
73
25 May 2021
33
73
Total Floor Area
78 sq m
Current CO2 Emissions Level
6.5
Potential CO2 Emissions Level
2.9
CO2 per sq m per Year
84
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
6 Mortimer Square
Date
5 Aug 2014
Current
Potential
36
81
Property Type
House
Built Form
End-Terrace
Constructed
1900-1929
+
Certificate History
5 Aug 2014
36
81
18 Mar 2013
44
78
Total Floor Area
91 sq m
Current CO2 Emissions Level
6.1
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
67
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
Flat 1, 3 Mortimer Square
Date
26 Jul 2022
Current
Potential
76
79
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1900-1929
+
Certificate History
26 Jul 2022
76
79
Total Floor Area
107 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
2.2
CO2 per sq m per Year
24
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
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.