PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Knella Road, WELWYN GARDEN CITY, AL7 3NA
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 Knella Road, AL7 3NA 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 Knella Road, WELWYN GARDEN CITY, AL7 3NA
Period Covered:
2008 - 31 October 2024
Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
101 Knella Road
Date
30 Mar 2024
Current
Potential
70
87
Property Type
House
Built Form
End-Terrace
Constructed
1930-1949
Certificate History
30 Mar 2024
70
87
18 May 2012
60
86
Total Floor Area
62 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
107 Knella Road
Date
19 Sep 2012
Current
Potential
71
90
Property Type
House
Built Form
Mid-Terrace
Constructed
1930-1949
Certificate History
19 Sep 2012
71
90
Total Floor Area
63 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
33
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
109 Knella Road
Date
26 Jun 2024
Current
Potential
69
87
Property Type
House
Built Form
Mid-Terrace
Constructed
1930-1949
Certificate History
26 Jun 2024
69
87
25 Feb 2011
59
76
Total Floor Area
63 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
109 KNELLA ROAD, WELWYN GARDEN CITY
Date
5 May 2021
Current
Potential
69
87
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
Certificate History
5 May 2021
69
87
Total Floor Area
66 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
113 Knella Road
Date
18 Sep 2009
Current
Potential
60
74
Property Type
House
Built Form
End-Terrace
Constructed
1950-1966
Certificate History
18 Sep 2009
60
74
Total Floor Area
76 sq m
Current CO2 Emissions Level
3.9
Potential CO2 Emissions Level
2.5
CO2 per sq m per Year
58
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
115 Knella Road
Date
27 Sep 2016
Current
Potential
68
87
Property Type
House
Built Form
Mid-Terrace
Constructed
1930-1949
Certificate History
27 Sep 2016
68
87
Total Floor Area
64 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
41
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
121 Knella Road
Date
14 Oct 2020
Current
Potential
62
85
Property Type
House
Built Form
Mid-Terrace
Constructed
1967-1975
Certificate History
14 Oct 2020
62
85
27 Sep 2010
69
76
Total Floor Area
58 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
53
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
45 Knella Road
Date
29 May 2018
Current
Potential
70
85
Property Type
House
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
29 May 2018
70
85
Total Floor Area
75 sq m
Current CO2 Emissions Level
2.7
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
47 Knella Road
Date
5 Aug 2024
Current
Potential
72
88
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1991-1995
Certificate History
5 Aug 2024
72
88
18 Sep 2012
68
86
Total Floor Area
64 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
49 Knella Road
Date
23 Apr 2009
Current
Potential
79
79
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
23 Apr 2009
79
79
Total Floor Area
55 sq m
Current CO2 Emissions Level
1.8
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
32
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
51 KNELLA ROAD, WELWYN GARDEN CITY
Date
28 Mar 2021
Current
Potential
71
87
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
28 Mar 2021
71
87
Total Floor Area
65 sq m
Current CO2 Emissions Level
2.3
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
36
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
53 Knella Road
Date
25 Aug 2022
Current
Potential
69
84
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1991-1995
Certificate History
25 Aug 2022
69
84
Total Floor Area
72 sq m
Current CO2 Emissions Level
2.9
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
55a Knella Road
Date
27 May 2009
Current
Potential
66
77
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1991-1995
Certificate History
27 May 2009
66
77
Total Floor Area
58 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
2.0
CO2 per sq m per Year
51
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
57b Knella Road
Date
16 Feb 2018
Current
Potential
73
90
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
2003-2006
Certificate History
16 Feb 2018
73
90
Total Floor Area
64 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
33
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
61a Knella Road
Date
14 Mar 2014
Current
Potential
76
92
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1991-1995
Certificate History
14 Mar 2014
76
92
15 Aug 2012
72
86
Total Floor Area
60 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.2
CO2 per sq m per Year
27
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
61b Knella Road
Date
24 Feb 2009
Current
Potential
65
74
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1991-1995
Certificate History
24 Feb 2009
65
74
Total Floor Area
52 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
57
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
61B KNELLA ROAD, WELWYN GARDEN CITY
Date
4 Apr 2021
Current
Potential
71
87
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1996-2002
Certificate History
4 Apr 2021
71
87
Total Floor Area
54 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
63a Knella Road
Date
16 Feb 2018
Current
Potential
75
89
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
2003-2006
Certificate History
16 Feb 2018
75
89
Total Floor Area
59 sq m
Current CO2 Emissions Level
1.8
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
31
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
63b Knella Road
Date
25 Jan 2020
Current
Potential
72
88
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
25 Jan 2020
72
88
Total Floor Area
59 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
34
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
65 Knella Road
Date
21 Jun 2011
Current
Potential
68
70
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
21 Jun 2011
68
70
Total Floor Area
81 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
2.8
CO2 per sq m per Year
38
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
67 Knella Road
Date
2 Nov 2016
Current
Potential
72
89
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1996-2002
Certificate History
2 Nov 2016
72
89
Total Floor Area
62 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
69 Knella Road
Date
15 Jun 2009
Current
Potential
64
74
Property Type
House
Built Form
End-Terrace
Constructed
1950-1966
Certificate History
15 Jun 2009
64
74
Total Floor Area
62 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
53
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
75 Knella Road
Date
27 Jan 2009
Current
Potential
69
76
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
Certificate History
27 Jan 2009
69
76
Total Floor Area
66 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
2.3
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
79 Knella Road
Date
2 Aug 2016
Current
Potential
69
86
Property Type
House
Built Form
End-Terrace
Constructed
1930-1949
Certificate History
2 Aug 2016
69
86
Total Floor Area
63 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
39
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
83 Knella Road
Date
16 Feb 2010
Current
Potential
65
74
Property Type
House
Built Form
Mid-Terrace
Constructed
1930-1949
Certificate History
16 Feb 2010
65
74
Total Floor Area
66 sq m
Current CO2 Emissions Level
3.2
Potential CO2 Emissions Level
2.5
CO2 per sq m per Year
49
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
87 Knella Road
Date
3 Sep 2018
Current
Potential
66
87
Property Type
House
Built Form
Mid-Terrace
Constructed
1930-1949
Certificate History
3 Sep 2018
66
87
Total Floor Area
65 sq m
Current CO2 Emissions Level
2.9
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
89 Knella Road
Date
20 Oct 2008
Current
Potential
57
69
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
Certificate History
20 Oct 2008
57
69
Total Floor Area
64 sq m
Current CO2 Emissions Level
4.1
Potential CO2 Emissions Level
3.0
CO2 per sq m per Year
64
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
91 Knella Road
Date
26 Nov 2022
Current
Potential
66
85
Property Type
House
Built Form
End-Terrace
Constructed
1930-1949
Certificate History
26 Nov 2022
66
85
Total Floor Area
65 sq m
Current CO2 Emissions Level
2.9
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
93 Knella Road
Date
13 Mar 2013
Current
Potential
65
88
Property Type
House
Built Form
End-Terrace
Constructed
1930-1949
Certificate History
13 Mar 2013
65
88
Total Floor Area
67 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
42
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
95 Knella Road
Date
11 Jul 2019
Current
Potential
62
87
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
Certificate History
11 Jul 2019
62
87
Total Floor Area
66 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
51
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
97 Knella Road
Date
25 Oct 2010
Current
Potential
69
70
Property Type
House
Built Form
Mid-Terrace
Constructed
1930-1949
Certificate History
25 Oct 2010
69
70
Total Floor Area
67 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
2.9
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Bands
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 2024.