Bespoke Orangeries, Glazing & Extensions. Managed End-to-End.

Whether upgrading your windows and doors or working with architects on custom extensions and one-off builds, we take your vision from concept to completion across Hampshire, Berkshire, and Surrey.

OVER 35 YEARS OF DELIVERING EXCEPTIONAL HOME TRANSFORMATIONS ACROSS THE SOUTH EAST

Since 1987, Excellent Windows has provided complete design, build, and architectural glazing services across Hampshire, Berkshire, and Surrey. We combine expert craftsmanship with end-to-end project management, helping homeowners transform their properties with ease and confidence.

Whether you are looking to replace existing windows and doors with high-performance timber alternatives, install sleek aluminium bifolds, or build a bespoke orangery from the ground up, we take full responsibility for your project from initial design to final polish. Supported by our 10-year insurance-backed guarantee, every installation is engineered to enhance your home’s security, thermal performance, and long-term value.

How We Can Transform Your Property

From complete design-and-build extensions to precision window and door installations across Hampshire, Berkshire, and Surrey.

WINDOWS

We supply and install a wide range of high-quality windows. From sleek aluminium styles to traditional uPVC options. All our windows are designed for energy efficiency, security, and long-lasting performance; perfect for modern homes or period properties.

DOORS

Create seamless transitions between your indoor and outdoor living areas. Our range includes secure composite entrance doors, traditional stable doors, and large-span aluminium bifold or sliding door systems engineered for smooth, effortless operation.

ORANGERIES, CONSERVATORIES & EXTENSIONS

Expand your home with a custom-designed living space built for year-round comfort. From traditional timber-look orangeries and glass extensions to modern conservatory transformations, we manage the entire project; handling design, groundworks, construction, and final finishing under one roof.

ROLLER GARAGE DOORS

Secure and refine your home’s exterior with space-saving, electric roller garage doors. Engineered for smooth operation, high thermal performance, and exceptional security, tailored to match your property’s aesthetic.

FASCIAS, SOFFITS & GUTTERING

Safeguard your property against weather damage with low-maintenance, expertly fitted roofline systems. Our durable fascias, soffits, and high-capacity guttering ensure optimal drainage while keeping your exterior looking sharp year after year.

Our Installation Process

01

Free Consultation & Quote

Arrange a convenient home appointment or, where suitable, receive an initial quotation from emailed photos. We'll answer your questions, offer honest advice and recommend products that best suit your property, lifestyle and budget, without any pressure to buy.

02

Design & Specification

Your quotation is tailored to your project, with clear specifications and transparent pricing throughout. For conservatories, orangeries and other bespoke installations, we'll also provide detailed design drawings to bring your ideas to life.

03

Contract & Deposit

Once you're happy to proceed, we'll confirm everything in writing and explain the installation process, payment schedule and next steps before your products go into production.

04

Ordering & Scheduling

Your products are manufactured to your exact specification. Once they arrive, we carry out thorough quality checks before contacting you to arrange a convenient installation date.

05

Professional Installation

Our experienced installers complete every installation professionally while creating a friendly, relaxed experience from start to finish. Should anything require attention, we'll ensure it's resolved before the final stage of payment is completed.

06

Registration & Aftercare

Once your installation is complete, we'll register the installation so the relevant certification can be issued. If you ever need us in the future, our team is only a phone call, WhatsApp message or online enquiry away.

DEDICATED AFTERCARE & 10-YEAR PEACE OF MIND

Our commitment to your home doesn’t end when the installation is complete. Every project we deliver across Hampshire, Berkshire, and Surrey is backed by our comprehensive 10-year insurance guarantee and dedicated customer care team.

Whether you need expert maintenance advice, seasonal care tips, or support with existing installations, our local specialist team is always on hand to ensure your products continue to look and perform at their absolute best.

Truly Excellent. No hard sell, quotes provided quickly and measured. Less of a wait time for the new doors than others. Queries answered quickly. Installation was very good. Excellent worked with us for a convenient time. We also had a question after installation manger came straight out to see us. We are very pleased with our new doors thank you Excellent we will be recommending you to friends and family.

Annie

Just as the company name suggests… ‘Excellent’! Great customer service from start to finish, competitive quote, fantastic team that fitted my French doors, everyone aims to deliver the best service they can… will be using again!

Kate A.

A superb job completed by a superb team. From the initial no need to haggle “best price” quote to sending the final invoice, this has been a pleasurable experience. The fitters arrived promptly at the arranged time and worked tirelessly until they had completed a 1st class job. All the more impressive as it was done on the hottest day of the year in decades. Would certainly recommend and will be using Excellent Windows again soon.

Rob S.

I recently had my rear door replaced. Great service throughout, whole team were very helpful & friendly. I will definitely be ordering my new front door shortly! Thanks guys, great job.

Claire J.

Very helpful when came to talk about our conservatory options, very competitively priced and we now have a lovely extra family room we use daily.

Jason R.

Explore the locations we cover

We provide professional window installation across Hampshire, Berkshire and Surrey. Explore our key service areas below or view all locations we cover.

Why Choose Excellent Windows?

Window Guarantee Installers in Basingstoke

10 YEAR GUARANTEE

If for any reason, there is a problem with your installation, we will put things right at no extra cost.

Trustpilot windows company in Basingstoke

QUALITY SERVICE

Our experienced team are on hand to guide you to ensure you end up with the best product for your property. Better yet, it is all fitted by our qualified installation team.

Windows Guarantee suppliers

SATISFACTION PLEDGE

After your initial deposit, pay your final balance when you sign off on the installation giving you peace of mind.

FREQUENTLY ASKED QUESTIONS

Everything you need to know about our design, build, and installation process across Hampshire, Berkshire, and Surrey.

Which geographic areas do you cover for design, build, and glazing projects?

We supply, install, and manage complete project builds across Hampshire, Berkshire, and Surrey: including Winchester, Reading, Wokingham, Guildford, Windsor, Ascot, and surrounding areas.

Yes. We handle complete turnkey design-and-build projects, including initial concepts, groundworks, structural construction, glazing installation, and final finishing touches.

Absolutely. We regularly collaborate with architects, interior designers, and project managers to supply and fit technical architectural glazing that meets exact specifications and Building Regulations.

All our window and door systems, from timber-alternative flush sash ranges to slimline aluminium bifolds, are engineered for maximum thermal efficiency, helping to reduce energy costs while exceeding standard UK Building Regulations.

Yes, all our installations and completed builds are backed by a comprehensive 10-year insurance-backed guarantee for complete long-term peace of mind.