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PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Knowbury Avenue, PENARTH, CF64 5RX

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 Knowbury Avenue, CF64 5RX 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 Knowbury Avenue, PENARTH, CF64 5RX
Period Covered: 2008 - 31 January 2025

Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
1 Knowbury Avenue
Date
28 Sep 2021
Current
Potential
71
82
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
28 Sep 2021
71
82
Total Floor Area
131 sq m
Current CO2 Emissions Level
3.9
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
30
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
10 Knowbury Avenue
Date
14 Jun 2023
Current
Potential
73
80
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
14 Jun 2023
73
80
19 Jan 2016
55
83
Total Floor Area
204 sq m
Current CO2 Emissions Level
4.9
Potential CO2 Emissions Level
3.5
CO2 per sq m per Year
24
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
4
Address
12 Knowbury Avenue
Date
22 Jun 2014
Current
Potential
69
84
Property Type
House
Built Form
Detached
Constructed
1967-1975
+
Certificate History
22 Jun 2014
69
84
Total Floor Area
95 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
33
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
14 KNOWBURY AVENUE
Date
26 May 2021
Current
Potential
67
82
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
26 May 2021
67
82
Total Floor Area
91 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
36
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
14 Knowbury Avenue
Date
25 Jul 2018
Current
Potential
60
79
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
25 Jul 2018
60
79
Total Floor Area
96 sq m
Current CO2 Emissions Level
4.2
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
17 Knowbury Avenue
Date
13 Nov 2013
Current
Potential
40
81
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
13 Nov 2013
40
81
25 Sep 2012
43
79
Total Floor Area
176 sq m
Current CO2 Emissions Level
11.0
Potential CO2 Emissions Level
3.2
CO2 per sq m per Year
64
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
20 Knowbury Avenue
Date
6 Nov 2019
Current
Potential
54
79
Property Type
House
Built Form
Detached
Constructed
1967-1975
+
Certificate History
6 Nov 2019
54
79
Total Floor Area
203 sq m
Current CO2 Emissions Level
9.9
Potential CO2 Emissions Level
4.3
CO2 per sq m per Year
49
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
22 Knowbury Avenue
Date
30 May 2019
Current
Potential
73
81
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
30 May 2019
73
81
Total Floor Area
209 sq m
Current CO2 Emissions Level
5.6
Potential CO2 Emissions Level
4.0
CO2 per sq m per Year
27
Mains Gas Available
Yes
Habitable Rooms
8
Number of Extensions
2
Address
3 Knowbury Avenue
Date
16 Mar 2009
Current
Potential
62
67
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
16 Mar 2009
62
67
Total Floor Area
146 sq m
Current CO2 Emissions Level
6.2
Potential CO2 Emissions Level
5.5
CO2 per sq m per Year
42
Mains Gas Available
Yes
Habitable Rooms
8
Number of Extensions
1
Address
4 Knowbury Avenue
Date
1 Apr 2019
Current
Potential
65
79
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
1 Apr 2019
65
79
Total Floor Area
147 sq m
Current CO2 Emissions Level
5.5
Potential CO2 Emissions Level
3.3
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
7 Knowbury Avenue
Date
15 Jan 2014
Current
Potential
51
73
Property Type
House
Built Form
Detached
Constructed
1976-1982
+
Certificate History
15 Jan 2014
51
73
Total Floor Area
120 sq m
Current CO2 Emissions Level
5.8
Potential CO2 Emissions Level
2.8
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
6
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.