Skip to content

PAS 2035/2030:2019, Retrofitting dwellings for improved energy efficiency. Specification and guidance. Specification for the installation of energy efficiency measures in existing dwellings and insulation in residential park homes

Register for the first time

If you've been provided with an access code, enter your details below. You'll receive an email from with further instructions.

Request reminder

If you are already a user of PAS 2035 framework Online, but have lost your link to access the system, enter the email address you registered with to resend your link. You will then receive an email from, containing your link.

If you are having problems accessing PAS 2035 framework, please see our Help page, or contact us at for assistance.

This site is for people who have purchased a copy of specification PAS 2035 framework, or have access to this application through their employer. For more information about the PAS 2035 framework specification or to purchase access, please visit the Energy Efficiency Retrofit pages on the BSI website.

PAS 2035 framework is the copyright of British Standards Institution and use of PAS 2035 framework Online is subject to the restrictions set out in our terms and conditions. Only registered users are permitted to access this system; any unauthorized access risks invalidating the registered user's licence.