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PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Knightsfield, WELWYN GARDEN CITY, AL8 7NB

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 Knightsfield, AL8 7NB 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 Knightsfield, WELWYN GARDEN CITY, AL8 7NB
Period Covered: 2008 - 31 October 2024

Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
337 KNIGHTSFIELD
Date
24 May 2021
Current
Potential
55
83
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
24 May 2021
55
83
Total Floor Area
104 sq m
Current CO2 Emissions Level
5.6
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
54
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
343 Knightsfield
Date
29 Sep 2015
Current
Potential
58
82
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
29 Sep 2015
58
82
Total Floor Area
108 sq m
Current CO2 Emissions Level
5.6
Potential CO2 Emissions Level
2.2
CO2 per sq m per Year
52
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
349 Knightsfield
Date
2 Mar 2013
Current
Potential
49
82
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
2 Mar 2013
49
82
Total Floor Area
100 sq m
Current CO2 Emissions Level
5.9
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
59
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
351 Knightsfield
Date
2 Jul 2014
Current
Potential
66
84
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
2 Jul 2014
66
84
Total Floor Area
97 sq m
Current CO2 Emissions Level
3.6
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
2
Address
353 Knightsfield
Date
13 Oct 2014
Current
Potential
67
81
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
+
Certificate History
13 Oct 2014
67
81
Total Floor Area
119 sq m
Current CO2 Emissions Level
4.1
Potential CO2 Emissions Level
2.3
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
2
Address
357 Knightsfield
Date
7 Feb 2023
Current
Potential
67
80
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
7 Feb 2023
67
80
16 Apr 2012
65
77
Total Floor Area
117 sq m
Current CO2 Emissions Level
4.2
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
36
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
1
Address
365 Knightsfield
Date
19 Jan 2010
Current
Potential
54
67
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
19 Jan 2010
54
67
Total Floor Area
103 sq m
Current CO2 Emissions Level
5.8
Potential CO2 Emissions Level
4.4
CO2 per sq m per Year
57
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
371 Knightsfield
Date
12 Mar 2014
Current
Potential
47
84
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
12 Mar 2014
47
84
22 Oct 2009
50
75
Total Floor Area
88 sq m
Current CO2 Emissions Level
5.7
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
64
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
373 Knightsfield
Date
28 May 2018
Current
Potential
55
85
Property Type
House
Built Form
End-Terrace
Constructed
1967-1975
+
Certificate History
28 May 2018
55
85
Total Floor Area
97 sq m
Current CO2 Emissions Level
5.4
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
56
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
2
Address
377 Knightsfield
Date
6 Mar 2014
Current
Potential
60
82
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
6 Mar 2014
60
82
Total Floor Area
104 sq m
Current CO2 Emissions Level
4.7
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
46
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
383 Knightsfield
Date
20 Dec 2017
Current
Potential
59
72
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
20 Dec 2017
59
72
Total Floor Area
98 sq m
Current CO2 Emissions Level
4.6
Potential CO2 Emissions Level
3.1
CO2 per sq m per Year
47
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
385 Knightsfield
Date
23 Feb 2012
Current
Potential
66
72
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
23 Feb 2012
66
72
Total Floor Area
102 sq m
Current CO2 Emissions Level
4.0
Potential CO2 Emissions Level
3.2
CO2 per sq m per Year
39
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
387 Knightsfield
Date
13 Aug 2014
Current
Potential
67
85
Property Type
House
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
13 Aug 2014
67
85
6 Mar 2014
56
83
Total Floor Area
110 sq m
Current CO2 Emissions Level
3.9
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
5
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.

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