Advanced

PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Knella Road, WELWYN GARDEN CITY, AL7 3NJ

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 Knella Road, AL7 3NJ 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 Knella Road, WELWYN GARDEN CITY, AL7 3NJ
Period Covered: 2008 - 31 October 2024

Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
134 Knella Road
Date
9 Jun 2010
Current
Potential
59
70
Property Type
House
Built Form
End-Terrace
Constructed
1900-1929
+
Certificate History
9 Jun 2010
59
70
Total Floor Area
68 sq m
Current CO2 Emissions Level
4.0
Potential CO2 Emissions Level
2.9
CO2 per sq m per Year
59
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
136 Knella Road
Date
23 Jul 2017
Current
Potential
63
84
Property Type
House
Built Form
Mid-Terrace
Constructed
1930-1949
+
Certificate History
23 Jul 2017
63
84
Total Floor Area
63 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
50
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
138 Knella Road
Date
8 Oct 2013
Current
Potential
43
72
Property Type
House
Built Form
Mid-Terrace
Constructed
1930-1949
+
Certificate History
8 Oct 2013
43
72
Total Floor Area
69 sq m
Current CO2 Emissions Level
5.2
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
75
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
144 Knella Road
Date
25 Jun 2024
Current
Potential
66
83
Property Type
House
Built Form
End-Terrace
Constructed
1930-1949
+
Certificate History
25 Jun 2024
66
83
12 Jan 2009
62
73
Total Floor Area
67 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
148 Knella Road
Date
10 Oct 2011
Current
Potential
61
70
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
10 Oct 2011
61
70
Total Floor Area
72 sq m
Current CO2 Emissions Level
3.6
Potential CO2 Emissions Level
2.6
CO2 per sq m per Year
50
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
150 Knella Road
Date
9 Dec 2019
Current
Potential
66
87
Property Type
House
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
9 Dec 2019
66
87
Total Floor Area
67 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
158 KNELLA ROAD
Date
26 Jul 2021
Current
Potential
69
85
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
26 Jul 2021
69
85
Total Floor Area
73 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
38
Mains Gas Available
Yes
Habitable Rooms
4
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.

Contains public sector information licensed under the Open Government Licence v3.0.
Contains Royal Mail data © Royal Mail copyright and Database right 2024.