Windows, doors & extensions across Essex · Brightlingsea showroom

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Family-run in Essex · Over 25 years’ experience

Windows, doors & home improvements in Chelmsford

For Chelmsford homeowners, we can show the difference between a focused entrance upgrade and a more extensive home improvement. Our published installations include a black Comp Door Aston and an Ultrasky orangery; the Springfield project combines replacement windows with a composite door. Explore the actual specifications and photographs, then tell us which parts of your own home you want to change.

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Ultrasky orangery installed by Spectrum Glazing in Chelmsford

Family-run · Over 25 years’ experience

Brightlingsea showroom

Free, no-obligation quotations

Start with your project

What would you like to improve?

Find a dedicated guide below for the work you are considering. We cover Chelmsford, Springfield, Great Baddow, Broomfield, Writtle, Danbury and surrounding villages. Our showroom is in Brightlingsea; send your postcode and we can discuss the next step for your Chelmsford property.

Replacement windows

Compare everyday casements, flush frames, sliding sashes and aluminium systems.

Doors for every part of your home

Start with the entrance, garden access or a divide between rooms.

Conservatories, extensions & roofs

Plan new living space or improve the conservatory you already have.

Finishing your home

Explore exterior finishes and privacy options alongside your main project.

Real local work

See what we have installed in Chelmsford

Grey windows and composite front door installed in Springfield, Chelmsford

Windows and a front door in Springfield

This Chelmsford project combined Halo smooth anthracite grey double-glazed windows with a Hallmark composite entrance door. See the original specification and installation photographs.

View the Springfield project →
Spectrum Glazing Ultrasky orangery project in Chelmsford

A complete orangery build in Chelmsford

An Ultrasky orangery with Smart aluminium bifold doors and an aluminium window. The project included foundations, the base, plastering and electrics.

Explore the orangery project →

A family-run Essex business

Advice you can talk through

Spectrum Glazing is a family-run business with over 25 years’ experience. We serve Chelmsford from our Brightlingsea base, with a showroom at 18 High Street, Brightlingsea, Essex CO7 0AE.

Visit to compare finishes and try products in person. If you want to see a particular range, check the current displays before travelling and book time with the team.

Explore the Brightlingsea showroom → Meet Spectrum Glazing →

An experienced team, with recognised memberships

CERTASS

Spectrum Glazing is CERTASS registered. CERTASS operates a competent-person scheme for eligible replacement window and door installations. Ask us which certification applies to your quoted work.

Federation of Master Builders

We are members of the Federation of Master Builders, a trade association for building businesses. We are happy to discuss the scope, installation process and product guarantees for your individual project.

From first ideas to a clear quotation

01 · Tell us about your home

Share the starting point

Send photographs, your Chelmsford postcode and any approximate dimensions or plans. Tell us what is not working now and what you would like to change.

02 · Compare the details

Agree the specification

Discuss materials, finishes, glass and the installation scope. A survey checks the opening or structure and identifies work that needs allowing for.

03 · Know what is included

Review your quotation

We set out the products, agreed works and next steps so you can make an informed decision. Ask us to clarify anything before you place an order.

Tell us about your Chelmsford project

Send a few photos, your postcode and any rough measurements or drawings. We will help you compare the options and arrange a free, no-obligation quotation.

Start your quote →