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PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Holly Road, KNEBWORTH, SG3 6LL

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 Holly Road, SG3 6LL 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 Holly Road, KNEBWORTH, SG3 6LL
Period Covered: 2008 - 31 January 2025

Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
1 Holly Road, Woolmer Green
Date
22 Nov 2024
Current
Potential
71
86
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
22 Nov 2024
71
86
8 Sep 2020
65
86
Total Floor Area
71 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
10 Holly Road, Woolmer Green
Date
30 Oct 2013
Current
Potential
63
80
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
30 Oct 2013
63
80
Total Floor Area
70 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
12 Holly Road, Woolmer Green
Date
18 Oct 2021
Current
Potential
67
83
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
18 Oct 2021
67
83
Total Floor Area
71 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
2 Holly Road, Woolmer Green
Date
9 Dec 2015
Current
Potential
60
81
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
9 Dec 2015
60
81
Total Floor Area
130 sq m
Current CO2 Emissions Level
6.2
Potential CO2 Emissions Level
2.9
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
8
Number of Extensions
2
Address
3 Holly Road, Woolmer Green
Date
14 Mar 2016
Current
Potential
69
80
Property Type
House
Built Form
Semi-Detached
Constructed
1900-1929
+
Certificate History
14 Mar 2016
69
80
17 Dec 2008
58
69
Total Floor Area
122 sq m
Current CO2 Emissions Level
3.5
Potential CO2 Emissions Level
2.2
CO2 per sq m per Year
29
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
2
Address
4 Holly Road, Woolmer Green
Date
27 Jul 2016
Current
Potential
70
80
Property Type
House
Built Form
Semi-Detached
Constructed
1900-1929
+
Certificate History
27 Jul 2016
70
80
Total Floor Area
126 sq m
Current CO2 Emissions Level
3.4
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
27
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
2
Address
5 Holly Road, Woolmer Green
Date
12 Mar 2014
Current
Potential
55
83
Property Type
House
Built Form
Semi-Detached
Constructed
1983-1990
+
Certificate History
12 Mar 2014
55
83
Total Floor Area
98 sq m
Current CO2 Emissions Level
5.1
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
52
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
2
Address
6 Holly Road, Woolmer Green
Date
22 Nov 2024
Current
Potential
72
87
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
22 Nov 2024
72
87
Total Floor Area
71 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
8 Holly Road, Woolmer Green
Date
20 Apr 2016
Current
Potential
67
81
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
20 Apr 2016
67
81
Total Floor Area
103 sq m
Current CO2 Emissions Level
4.0
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
39
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
9 Holly Road, Woolmer Green
Date
22 Nov 2024
Current
Potential
67
80
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
22 Nov 2024
67
80
27 Mar 2017
53
82
Total Floor Area
83 sq m
Current CO2 Emissions Level
3.2
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
39
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.

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