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PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Mill Lane, WELWYN, AL6 9ET

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 Mill Lane, AL6 9ET 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 Mill Lane, WELWYN, AL6 9ET
Period Covered: 2008 - 31 January 2025

Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
10 Mill Lane
Date
16 Feb 2011
Current
Potential
60
62
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
+
Certificate History
16 Feb 2011
60
62
Total Floor Area
68 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
3.0
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
12 Mill Lane
Date
9 Aug 2018
Current
Potential
58
79
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
+
Certificate History
9 Aug 2018
58
79
9 Oct 2008
52
63
Total Floor Area
75 sq m
Current CO2 Emissions Level
3.6
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
49
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
2
Address
16 Mill Lane
Date
12 May 2024
Current
Potential
73
91
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
+
Certificate History
12 May 2024
73
91
24 Apr 2012
61
92
Total Floor Area
70 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
29
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
2
Address
18 Mill Lane
Date
19 Jun 2023
Current
Potential
71
88
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
+
Certificate History
19 Jun 2023
71
88
11 Feb 2013
61
81
Total Floor Area
59 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
20 Mill Lane
Date
25 Nov 2009
Current
Potential
60
68
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
+
Certificate History
25 Nov 2009
60
68
Total Floor Area
97 sq m
Current CO2 Emissions Level
4.9
Potential CO2 Emissions Level
4.0
CO2 per sq m per Year
50
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
24 Mill Lane
Date
19 Jun 2022
Current
Potential
73
84
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
+
Certificate History
19 Jun 2022
73
84
5 Jan 2011
73
75
5 Jan 2011
72
74
Total Floor Area
119 sq m
Current CO2 Emissions Level
3.2
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
27
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
26 Mill Lane
Date
27 Mar 2017
Current
Potential
67
83
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
+
Certificate History
27 Mar 2017
67
83
12 Dec 2014
49
77
27 Mar 2014
55
81
Total Floor Area
126 sq m
Current CO2 Emissions Level
4.1
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
33
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
28 Mill Lane
Date
10 Oct 2022
Current
Potential
71
83
Property Type
House
Built Form
End-Terrace
Constructed
1900-1929
+
Certificate History
10 Oct 2022
71
83
25 Jul 2013
38
75
Total Floor Area
177 sq m
Current CO2 Emissions Level
5.6
Potential CO2 Emissions Level
3.4
CO2 per sq m per Year
31
Mains Gas Available
Yes
Habitable Rooms
9
Number of Extensions
2
Address
34 Mill Lane
Date
3 May 2018
Current
Potential
60
89
Property Type
House
Built Form
End-Terrace
Constructed
1900-1929
+
Certificate History
3 May 2018
60
89
12 Oct 2008
60
68
Total Floor Area
42 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
60
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
36 Mill Lane
Date
20 Sep 2023
Current
Potential
69
91
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
+
Certificate History
20 Sep 2023
69
91
26 Jan 2011
62
76
Total Floor Area
41 sq m
Current CO2 Emissions Level
1.8
Potential CO2 Emissions Level
0.3
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
38 Mill Lane
Date
25 Jun 2017
Current
Potential
55
87
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
+
Certificate History
25 Jun 2017
55
87
Total Floor Area
53 sq m
Current CO2 Emissions Level
3.6
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
68
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
1
Address
40 Mill Lane
Date
13 Oct 2010
Current
Potential
48
49
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
+
Certificate History
13 Oct 2010
48
49
Total Floor Area
81 sq m
Current CO2 Emissions Level
5.9
Potential CO2 Emissions Level
5.8
CO2 per sq m per Year
73
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
44 Mill Lane
Date
24 Jan 2022
Current
Potential
37
69
Property Type
House
Built Form
Detached
Constructed
before 1900
+
Certificate History
24 Jan 2022
37
69
Total Floor Area
182 sq m
Current CO2 Emissions Level
13.0
Potential CO2 Emissions Level
6.4
CO2 per sq m per Year
74
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
0
Address
8 Mill Lane
Date
19 Oct 2015
Current
Potential
59
85
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
+
Certificate History
19 Oct 2015
59
85
18 Apr 2011
49
62
Total Floor Area
83 sq m
Current CO2 Emissions Level
3.9
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
47
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.