Beautifully crafted windows, doors, conservatories, roof lights and lanterns

Windows, doors, conservatories, roof lights and lanterns for period properties ranging from the 1930s through to modern new builds. Guaranteed for ten years.

Book a home visit01442 600 101
A red-brick Edwardian villa with freshly painted off-white flush sash windows on a leafy Home-Counties street

What we install

Whether it’s for domestic or commercial use, our wide range of products ensure we can help every type of project across Hertfordshire, Buckinghamshire, Bedfordshire and North London.

Close-up of a white flush window frame corner set in a sandstone wall, with soft greenery in the foreground

Windows

Flush and casement in timber-effect uPVC for period terraces, cottages and 1930s semis. Slim-frame aluminium and tilt-and-turn for new-builds and upper floors. Bay windows that hold the front of a house together. Drawn to fit the house.

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A black composite front door on a Victorian terrace with polished brass furniture

Doors

Front and back doors in composite and timber-effect uPVC. French and patio doors. Slim aluminium bi-folds for the rear of your home.

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An Edwardian-style conservatory roof ridge with cast cresting and a finial against a pale sky

Conservatories

Edwardian and Victorian classical conservatories in both glass and solid roofs. Modern garden rooms with solid roofs, perfect for a work from home space. Built and insulated ensuring you can use this space all year round.

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Alex Dukes, co-founder of Dukes Windows, in a navy branded polo shirt standing in front of the company van

Meet the co-founder

Dukes Windows — an honest, professional service, built on reputation.
Alex Dukes, co-founder
Read Alex's story

Built for every kind of home.

From a Victorian sash in the city centre to a modern aluminium bifold on a new-build estate. We work in every house style across Hertfordshire, Buckinghamshire, Bedfordshire and North London.

A Victorian terraced house in yellow stock brick with tall painted sash windows and a panelled door
Victorian
An Edwardian villa with a painted bay window and white flush sash windows in red brick
Edwardian
A 1930s semi-detached house with pebbledash render and a bay window with painted flush casements
1930s semi
A mock-Tudor detached house with half-timbered gables and leaded-light windows in dark frames
Mock-Tudor
A plain post-war estate semi in brick and render with simple casement windows and a tidy garden
Post-war
A modern detached new-build house with slim anthracite aluminium windows and a contemporary door
Modern new-build

How we work.

Five steps from your first call to handover. Nothing skipped.

  1. 1

    First call

    Guaranteed call back within two business hours.

  2. 2

    Home visit

    A visit at your home.

  3. 3

    Quote

    In writing. Itemised.

  4. 4

    Survey & manufacture

    An official survey within five working days, before anything is made.

  5. 5

    Install & handover

    Your ten-year guarantee, in writing.

See our full process

Why choose Dukes?

We care.

At Dukes Windows, we genuinely care. We believe what sets us apart is our commitment to putting our customers at the heart of everything we do. From your first enquiry through to the final installation and beyond, we’re dedicated to providing honest advice, exceptional workmanship, and outstanding customer service. Your satisfaction isn’t just our goal – it’s the foundation of our business.

Built on three values.

Honesty, pride and integrity. Dukes was co-founded to bring an honest, professional and reliable service to a trade that too often lacks all three.

Recent work.

Three house types, three quietly different jobs — the kind of work Dukes is built for.

The three-quarter frontage of an Edwardian villa with finished painted off-white flush sash windows
Edwardian villa

Full sash replacement, Beech Road

A 1930s semi with a restored front bay in pebbledash render with painted flush casements
1930s semi

Front bay and side casements

A modern new-build with slim anthracite windows and bifold doors
Modern new-build

Rear bifolds and garden room

Hertfordshire Homes Guide

From the Hertfordshire Homes Guide.

Free reading on windows, doors and conservatories for every house in the county. No form, no email.

A 1930s semi front bay window in pebbledash with painted flush casements, viewed three-quarter on
1930s semi

The bay window is the front of the house.

8 min read
A Victorian terrace frontage with painted sash windows and a brick façade
Victorian

What to do with a Victorian sash window.

12 min read
Read the full guide

Book a home visit.

Book a home visit and we'll talk through your project at your house — no call centre, no hard sell. We call back within two business hours, and you'll get an itemised written quote.

Book a home visit01442 600 101