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PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Herlwyn Avenue, RUISLIP, HA4 6HQ

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 Herlwyn Avenue, HA4 6HQ 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 Herlwyn Avenue, RUISLIP, HA4 6HQ
Period Covered: 2008 - 31 October 2024

Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
102 Herlwyn Avenue
Date
19 Jun 2014
Current
Potential
73
86
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
19 Jun 2014
73
86
Total Floor Area
111 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
28
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
104 Herlwyn Avenue
Date
17 Dec 2012
Current
Potential
40
78
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
17 Dec 2012
40
78
Total Floor Area
78 sq m
Current CO2 Emissions Level
6.0
Potential CO2 Emissions Level
2.0
CO2 per sq m per Year
77
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
106 Herlwyn Avenue
Date
10 Sep 2013
Current
Potential
47
83
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
10 Sep 2013
47
83
Total Floor Area
60 sq m
Current CO2 Emissions Level
4.3
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
72
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
112 Herlwyn Avenue
Date
13 Dec 2016
Current
Potential
65
83
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
13 Dec 2016
65
83
Total Floor Area
67 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
114 Herlwyn Avenue
Date
6 Feb 2013
Current
Potential
54
82
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
6 Feb 2013
54
82
Total Floor Area
48 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
65
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
74 Herlwyn Avenue
Date
29 Dec 2014
Current
Potential
43
77
Property Type
Bungalow
Built Form
Detached
Constructed
1930-1949
+
Certificate History
29 Dec 2014
43
77
23 Jul 2012
43
74
Total Floor Area
89 sq m
Current CO2 Emissions Level
6.3
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
70
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
76 Herlwyn Avenue
Date
8 Aug 2022
Current
Potential
57
84
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
8 Aug 2022
57
84
Total Floor Area
62 sq m
Current CO2 Emissions Level
3.5
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
57
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
78 Herlwyn Avenue
Date
20 Jun 2022
Current
Potential
67
89
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
20 Jun 2022
67
89
25 Jan 2011
60
67
Total Floor Area
61 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
42
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
84 Herlwyn Avenue
Date
28 May 2013
Current
Potential
50
82
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
+
Certificate History
28 May 2013
50
82
Total Floor Area
71 sq m
Current CO2 Emissions Level
4.6
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
65
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
86 Herlwyn Avenue
Date
18 Apr 2011
Current
Potential
59
65
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
18 Apr 2011
59
65
Total Floor Area
84 sq m
Current CO2 Emissions Level
4.4
Potential CO2 Emissions Level
3.6
CO2 per sq m per Year
52
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
88 Herlwyn Avenue
Date
11 Apr 2012
Current
Potential
46
76
Property Type
House
Built Form
Detached
Constructed
1930-1949
+
Certificate History
11 Apr 2012
46
76
Total Floor Area
147 sq m
Current CO2 Emissions Level
8.7
Potential CO2 Emissions Level
3.7
CO2 per sq m per Year
59
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
1
Address
90 Herlwyn Avenue
Date
16 Jan 2023
Current
Potential
38
78
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
16 Jan 2023
38
78
Total Floor Area
89 sq m
Current CO2 Emissions Level
7.1
Potential CO2 Emissions Level
2.2
CO2 per sq m per Year
80
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
92 HERLWYN AVENUE, RUISLIP
Date
29 Mar 2021
Current
Potential
66
87
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
29 Mar 2021
66
87
Total Floor Area
74 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
42
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
96 Herlwyn Avenue
Date
4 Sep 2023
Current
Potential
69
87
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
4 Sep 2023
69
87
Total Floor Area
65 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
38
Mains Gas Available
Yes
Habitable Rooms
4
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.