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PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Knolles Crescent, HATFIELD, AL9 7DZ

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 Knolles Crescent, AL9 7DZ 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 Knolles Crescent, HATFIELD, AL9 7DZ
Period Covered: 2008 - 31 January 2025

Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
1 Knolles Crescent, Welham Green
Date
22 Nov 2024
Current
Potential
73
85
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
22 Nov 2024
73
85
11 Jul 2013
37
86
Total Floor Area
95 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
31
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
17 Knolles Crescent, Welham Green
Date
24 Apr 2023
Current
Potential
73
87
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
24 Apr 2023
73
87
Total Floor Area
98 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
31
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
21 Knolles Crescent, Welham Green, North Mymms
Date
11 Aug 2014
Current
Potential
73
86
Property Type
House
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
11 Aug 2014
73
86
Total Floor Area
91 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
29
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
23 Knolles Crescent, Welham Green, North Mymms
Date
18 Jan 2020
Current
Potential
65
84
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
18 Jan 2020
65
84
Total Floor Area
80 sq m
Current CO2 Emissions Level
3.6
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
27 Knolles Crescent, Welham Green
Date
22 Nov 2024
Current
Potential
71
84
Property Type
House
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
22 Nov 2024
71
84
Total Floor Area
98 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
34
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
29 Knolles Crescent, Welham Green, North Mymms
Date
31 Oct 2019
Current
Potential
59
87
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
31 Oct 2019
59
87
1 Oct 2009
54
74
Total Floor Area
100 sq m
Current CO2 Emissions Level
5.2
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
52
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
31 Knolles Crescent, Welham Green
Date
3 May 2022
Current
Potential
71
86
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
3 May 2022
71
86
26 Jun 2011
72
75
Total Floor Area
97 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
34
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
33 Knolles Crescent, Welham Green, North Mymms
Date
23 Apr 2017
Current
Potential
68
86
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
23 Apr 2017
68
86
Total Floor Area
97 sq m
Current CO2 Emissions Level
3.7
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
38
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
37 Knolles Crescent, Welham Green, North Mymms
Date
13 Aug 2017
Current
Potential
57
71
Property Type
House
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
13 Aug 2017
57
71
Total Floor Area
133 sq m
Current CO2 Emissions Level
6.9
Potential CO2 Emissions Level
4.7
CO2 per sq m per Year
52
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
43 Knolles Crescent, Welham Green
Date
22 Nov 2024
Current
Potential
71
87
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
22 Nov 2024
71
87
9 Mar 2016
68
88
Total Floor Area
62 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
38
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
45 Knolles Crescent, Welham Green
Date
22 Nov 2024
Current
Potential
70
90
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
22 Nov 2024
70
90
24 Jul 2017
70
90
Total Floor Area
43 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
47 Knolles Crescent, Welham Green
Date
22 Nov 2024
Current
Potential
70
86
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
22 Nov 2024
70
86
3 Jun 2009
71
75
Total Floor Area
62 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
39
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
49 Knolles Crescent, Welham Green
Date
22 Nov 2024
Current
Potential
71
87
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
22 Nov 2024
71
87
31 Jan 2020
70
88
Total Floor Area
62 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
38
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
51 Knolles Crescent, Welham Green
Date
22 Nov 2024
Current
Potential
70
90
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
22 Nov 2024
70
90
20 Apr 2018
69
89
30 Oct 2012
65
88
Total Floor Area
43 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
53 Knolles Crescent, Welham Green
Date
22 Nov 2024
Current
Potential
69
86
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
22 Nov 2024
69
86
24 Jan 2020
66
87
Total Floor Area
62 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
41
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
7 KNOLLES CRESCENT, WELHAM GREEN
Date
15 Oct 2020
Current
Potential
70
84
Property Type
House
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
15 Oct 2020
70
84
Total Floor Area
89 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
9 KNOLLES CRESCENT, WELHAM GREEN
Date
8 Apr 2021
Current
Potential
70
79
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
8 Apr 2021
70
79
Total Floor Area
108 sq m
Current CO2 Emissions Level
3.8
Potential CO2 Emissions Level
2.6
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
4
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.

Contains public sector information licensed under the Open Government Licence v3.0.
Contains Royal Mail data © Royal Mail copyright and Database right 2025.