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

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 7NQ 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 7NQ
Period Covered: 2008 - 31 October 2024

Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
294 Knightsfield
Date
9 Jun 2015
Current
Potential
70
83
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
9 Jun 2015
70
83
Total Floor Area
162 sq m
Current CO2 Emissions Level
5.3
Potential CO2 Emissions Level
3.0
CO2 per sq m per Year
33
Mains Gas Available
Yes
Habitable Rooms
10
Number of Extensions
2
Address
298 Knightsfield
Date
7 May 2013
Current
Potential
57
81
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
7 May 2013
57
81
Total Floor Area
124 sq m
Current CO2 Emissions Level
6.0
Potential CO2 Emissions Level
2.3
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
304 Knightsfield
Date
11 Apr 2010
Current
Potential
58
68
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
11 Apr 2010
58
68
Total Floor Area
96 sq m
Current CO2 Emissions Level
5.2
Potential CO2 Emissions Level
3.8
CO2 per sq m per Year
54
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
310 KNIGHTSFIELD
Date
14 Jul 2021
Current
Potential
59
73
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
14 Jul 2021
59
73
Total Floor Area
147 sq m
Current CO2 Emissions Level
6.9
Potential CO2 Emissions Level
4.6
CO2 per sq m per Year
47
Mains Gas Available
Yes
Habitable Rooms
8
Number of Extensions
2
Address
312 Knightsfield
Date
7 Mar 2018
Current
Potential
59
80
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
7 Mar 2018
59
80
Total Floor Area
130 sq m
Current CO2 Emissions Level
6.3
Potential CO2 Emissions Level
3.0
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
314 Knightsfield
Date
6 Nov 2018
Current
Potential
68
78
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
6 Nov 2018
68
78
Total Floor Area
164 sq m
Current CO2 Emissions Level
5.5
Potential CO2 Emissions Level
3.7
CO2 per sq m per Year
34
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
3
Address
316 Knightsfield
Date
2 Feb 2016
Current
Potential
70
80
Property Type
House
Built Form
Detached
Constructed
1967-1975
+
Certificate History
2 Feb 2016
70
80
Total Floor Area
287 sq m
Current CO2 Emissions Level
9.1
Potential CO2 Emissions Level
6.0
CO2 per sq m per Year
32
Mains Gas Available
Yes
Habitable Rooms
13
Number of Extensions
4
Address
320 Knightsfield
Date
28 Mar 2015
Current
Potential
51
67
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
28 Mar 2015
51
67
27 May 2013
64
80
Total Floor Area
202 sq m
Current CO2 Emissions Level
13.0
Potential CO2 Emissions Level
8.7
CO2 per sq m per Year
63
Mains Gas Available
Yes
Habitable Rooms
9
Number of Extensions
3
Address
330 Knightsfield
Date
7 Oct 2013
Current
Potential
64
80
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
7 Oct 2013
64
80
Total Floor Area
143 sq m
Current CO2 Emissions Level
5.4
Potential CO2 Emissions Level
2.9
CO2 per sq m per Year
38
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
1
Address
332 Knightsfield
Date
7 Mar 2024
Current
Potential
56
82
Property Type
House
Built Form
Detached
Constructed
1967-1975
+
Certificate History
7 Mar 2024
56
82
18 Apr 2010
59
67
Total Floor Area
152 sq m
Current CO2 Emissions Level
7.9
Potential CO2 Emissions Level
3.0
CO2 per sq m per Year
52
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
336 Knightsfield
Date
31 Aug 2022
Current
Potential
74
82
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
31 Aug 2022
74
82
9 Apr 2013
62
84
Total Floor Area
178 sq m
Current CO2 Emissions Level
4.8
Potential CO2 Emissions Level
3.3
CO2 per sq m per Year
27
Mains Gas Available
Yes
Habitable Rooms
8
Number of Extensions
1
Address
338 Knightsfield
Date
2 Nov 2022
Current
Potential
70
82
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
2 Nov 2022
70
82
Total Floor Area
175 sq m
Current CO2 Emissions Level
5.8
Potential CO2 Emissions Level
3.5
CO2 per sq m per Year
33
Mains Gas Available
Yes
Habitable Rooms
9
Number of Extensions
2
Address
340 KNIGHTSFIELD, WELWYN GARDEN CITY
Date
9 Apr 2021
Current
Potential
66
82
Property Type
House
Built Form
Detached
Constructed
1967-1975
+
Certificate History
9 Apr 2021
66
82
Total Floor Area
121 sq m
Current CO2 Emissions Level
4.7
Potential CO2 Emissions Level
2.5
CO2 per sq m per Year
39
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.

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