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PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Harmer Green Lane, WELWYN, AL6 0AS

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 Harmer Green Lane, AL6 0AS 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 Harmer Green Lane, WELWYN, AL6 0AS
Period Covered: 2008 - 31 October 2024

Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
21 Harmer Green Lane
Date
2 Jun 2010
Current
Potential
56
71
Property Type
House
Built Form
Semi-Detached
Constructed
before 1900
+
Certificate History
2 Jun 2010
56
71
Total Floor Area
150 sq m
Current CO2 Emissions Level
6.9
Potential CO2 Emissions Level
4.6
CO2 per sq m per Year
51
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
23 Harmer Green Lane
Date
8 Feb 2013
Current
Potential
63
75
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
8 Feb 2013
63
75
Total Floor Area
233 sq m
Current CO2 Emissions Level
8.5
Potential CO2 Emissions Level
5.7
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
10
Number of Extensions
2
Address
25 Harmer Green Lane
Date
23 May 2024
Current
Potential
73
79
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
23 May 2024
73
79
21 Jul 2013
52
78
Total Floor Area
249 sq m
Current CO2 Emissions Level
6.3
Potential CO2 Emissions Level
4.9
CO2 per sq m per Year
25
Mains Gas Available
Yes
Habitable Rooms
9
Number of Extensions
2
Address
27 Harmer Green Lane
Date
3 Feb 2015
Current
Potential
82
86
Property Type
House
Built Form
Detached
Constructed
N/A
+
Certificate History
3 Feb 2015
82
86
29 Jul 2011
51
70
Total Floor Area
275 sq m
Current CO2 Emissions Level
4.2
Potential CO2 Emissions Level
3.3
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
29 HARMER GREEN LANE
Date
29 Jun 2021
Current
Potential
67
80
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
29 Jun 2021
67
80
Total Floor Area
163 sq m
Current CO2 Emissions Level
5.8
Potential CO2 Emissions Level
3.6
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
8
Number of Extensions
1
Address
35 Harmer Green Lane
Date
11 Apr 2016
Current
Potential
86
89
Property Type
House
Built Form
N/A
Constructed
N/A
+
Certificate History
11 Apr 2016
86
89
25 Jul 2012
33
68
Total Floor Area
355 sq m
Current CO2 Emissions Level
4.2
Potential CO2 Emissions Level
3.3
CO2 per sq m per Year
12
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
37 Harmer Green Lane
Date
20 Dec 2008
Current
Potential
66
70
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
20 Dec 2008
66
70
Total Floor Area
183 sq m
Current CO2 Emissions Level
5.7
Potential CO2 Emissions Level
5.1
CO2 per sq m per Year
31
Mains Gas Available
Yes
Habitable Rooms
8
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.