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PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Cowper Road, HARPENDEN, AL5 5NF

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 Cowper Road, AL5 5NF 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 Cowper Road, HARPENDEN, AL5 5NF
Period Covered: 2008 - 31 January 2025

Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
1 Cowper Road
Date
4 Feb 2016
Current
Potential
85
90
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
+
Certificate History
4 Feb 2016
85
90
Total Floor Area
214 sq m
Current CO2 Emissions Level
2.7
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
13
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
11 Cowper Road
Date
31 Aug 2020
Current
Potential
47
77
Property Type
House
Built Form
End-Terrace
Constructed
1900-1929
+
Certificate History
31 Aug 2020
47
77
22 Jun 2010
40
41
Total Floor Area
146 sq m
Current CO2 Emissions Level
9.1
Potential CO2 Emissions Level
3.9
CO2 per sq m per Year
62
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
3
Address
13 Cowper Road
Date
9 Dec 2019
Current
Potential
46
69
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
+
Certificate History
9 Dec 2019
46
69
Total Floor Area
154 sq m
Current CO2 Emissions Level
10.0
Potential CO2 Emissions Level
5.6
CO2 per sq m per Year
65
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
2
Address
15 Cowper Road
Date
4 Feb 2022
Current
Potential
63
81
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
+
Certificate History
4 Feb 2022
63
81
3 Aug 2009
1
1
Total Floor Area
170 sq m
Current CO2 Emissions Level
7.0
Potential CO2 Emissions Level
3.4
CO2 per sq m per Year
41
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
1
Address
17 Cowper Road
Date
25 Aug 2014
Current
Potential
48
81
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
+
Certificate History
25 Aug 2014
48
81
Total Floor Area
142 sq m
Current CO2 Emissions Level
8.0
Potential CO2 Emissions Level
2.7
CO2 per sq m per Year
57
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
3
Address
1a Cowper Road
Date
4 Feb 2016
Current
Potential
85
90
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
+
Certificate History
4 Feb 2016
85
90
Total Floor Area
214 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
13
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
21 Cowper Road
Date
10 Sep 2013
Current
Potential
58
78
Property Type
House
Built Form
Semi-Detached
Constructed
1900-1929
+
Certificate History
10 Sep 2013
58
78
Total Floor Area
180 sq m
Current CO2 Emissions Level
7.8
Potential CO2 Emissions Level
3.9
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
8
Number of Extensions
1
Address
23 Cowper Road
Date
11 Jan 2017
Current
Potential
52
65
Property Type
House
Built Form
Semi-Detached
Constructed
1900-1929
+
Certificate History
11 Jan 2017
52
65
Total Floor Area
196 sq m
Current CO2 Emissions Level
11.0
Potential CO2 Emissions Level
7.8
CO2 per sq m per Year
55
Mains Gas Available
Yes
Habitable Rooms
9
Number of Extensions
3
Address
27 Cowper Road
Date
24 Jan 2019
Current
Potential
60
84
Property Type
House
Built Form
Semi-Detached
Constructed
1976-1982
+
Certificate History
24 Jan 2019
60
84
13 May 2014
60
82
Total Floor Area
133 sq m
Current CO2 Emissions Level
6.3
Potential CO2 Emissions Level
2.5
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
29 Cowper Road
Date
6 Jul 2016
Current
Potential
40
65
Property Type
House
Built Form
Semi-Detached
Constructed
before 1900
+
Certificate History
6 Jul 2016
40
65
Total Floor Area
194 sq m
Current CO2 Emissions Level
11.0
Potential CO2 Emissions Level
6.0
CO2 per sq m per Year
57
Mains Gas Available
Yes
Habitable Rooms
9
Number of Extensions
1
Address
31 Cowper Road
Date
9 Aug 2011
Current
Potential
34
42
Property Type
House
Built Form
Semi-Detached
Constructed
1900-1929
+
Certificate History
9 Aug 2011
34
42
24 Aug 2009
35
45
24 Aug 2009
41
53
Total Floor Area
150 sq m
Current CO2 Emissions Level
15.0
Potential CO2 Emissions Level
13.0
CO2 per sq m per Year
77
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
1
Address
31 COWPER ROAD, HARPENDEN
Date
10 Mar 2021
Current
Potential
51
78
Property Type
House
Built Form
Semi-Detached
Constructed
1900-1929
+
Certificate History
10 Mar 2021
51
78
Total Floor Area
181 sq m
Current CO2 Emissions Level
10.0
Potential CO2 Emissions Level
4.5
CO2 per sq m per Year
57
Mains Gas Available
Yes
Habitable Rooms
8
Number of Extensions
1
Address
33 Cowper Road
Date
30 Jan 2025
Current
Potential
69
87
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
30 Jan 2025
69
87
28 Apr 2016
55
69
Total Floor Area
106 sq m
Current CO2 Emissions Level
4.0
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
38
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
35 Cowper Road
Date
18 Nov 2016
Current
Potential
60
81
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
18 Nov 2016
60
81
Total Floor Area
106 sq m
Current CO2 Emissions Level
4.1
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
39
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
37 Cowper Road
Date
13 Apr 2011
Current
Potential
54
71
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
13 Apr 2011
54
71
Total Floor Area
90 sq m
Current CO2 Emissions Level
5.4
Potential CO2 Emissions Level
3.4
CO2 per sq m per Year
60
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 2026.