01268 777130


Have Your Windows and Doors been Installed by GJB New Build? Discover Our Range of Upgrades.

Transforming your home through targeted upgrades can have a profound impact on your day-to-day living experience. Simple changes like swapping out old handles or installing modern front doors not only elevate the aesthetic appeal of your space but also add functional value.

With GJB New Build, you have a partner that understands both design and durability, committed to helping you realise your home’s full potential. From state-of-the-art security systems to luxurious bi-fold doors, our diverse range of upgrades ensures your home reflects your unique style and meets your practical needs. 

Our Homeowner Upgrades

Bespoke side panelling design as upgrade

Bespoke side panelling

Upgrade to an integral satin unit or choose a satin sidelight with bespoke lettering or numbering is available, both from clear or other obscure units.

Glass with blinds

Glass with blinds

We can integrate blinds within the glass for bi-folds, walk-in bays, doors, and more.

Kubu upgrade


All our products are future-ready to integrate with Kubu smart security systems. Learn more.

Ultion keyless lock upgrade

Keyless Locks

We partner with leading suppliers to provide cutting-edge keyless/keypad door locks, fully compatible with all our composite doors.

Sealed unit upgrade

Sealed units

Upgrade your glass units to a modern satin look or opt for obscure units to ensure privacy where needed.

Glass with blinds

Bi-fold doors

Looking to replace your current French doors? We offer an array of bi-fold door options designed to match your existing specifications.

Upgrade handles


Whether it’s switching from white to chrome or vice versa, we can easily update your window and door handles.

Front door upgrade

Front doors

From minor tweaks like handle or glass upgrades to installing an entirely new front door, we’ve got you covered.

Window vent upgrade


Upgrading your vents and enjoy improved ventilation, energy efficiency, and a more comfortable living environment. Contact us to explore your options and enhance your home’s air quality.

GJB Newbuild’s proactive approach and reliability have been invaluable.

– Kelvin O’Dwyer-Heath – Persimmon Homes Suffolk

Their dedication to not just us, but also to our customers, truly stands out.

– Jasmine Sissen, Permission Homes Anglia (Norfolk) 

Find out More

To explore these options further, complete the form below or call us on 01268 777130

    Why Use GJB New Build for Your Upgrades?

    It’s important to note that our product guarantee remains valid only when upgrades are carried out by us; this guarantee does not extend to work performed by other installation companies and would render the original guarantee void. 

    Expertise You Can Trust

    We bring years of industry experience to your doorstep, ensuring each upgrade aligns with the highest quality standards. 

    Cohesive Design

    Our extensive range of products and options ensures seamless integration with your existing installations, maintaining a cohesive look throughout your home. 

    Guaranteed Quality

    Using GJB New Build for your upgrades ensures your original product guarantees remain intact. Other companies’ work may void your existing warranties. 

    Future-Ready Solutions

    Our offerings are designed with the future in mind, compatible with cutting-edge technologies like Kubu smart security systems.

    One-Stop Service

    From consultation to installation, our team takes care of every step, providing a smooth, hassle-free upgrade process.

    By choosing GJB New Build for your home upgrades, you’re investing in quality, continuity, and a future-proof living space. 

    *Please consult your original housebuilder deeds before making any changes to your new build property. GJB New Build accepts no responsibility for checking the individual covenants signed by you at the point of purchase.


    Our pledge to excellence is validated by industry recognitions. We are honoured to be accredited by CHAS and Secure By Design, and have won The NHBC Pride in the Job Award 3 years running in 2021/22/23, further solidifying our commitment to delivering unparalleled quality and security.