Doors
Front doors, designed your way.
Composite, uPVC, French, patio, bi-fold and sliding doors. 150+ styles, 1,500+ colour options, and a designer tool that lets you build yours before you call us.
Hallmark partnership · PAS 24 Secured by Design · 10-year warranty · NAPIT registered
Door Styles
Door styles to suit your home.
Whether it's the front door that makes the first impression or the bi-folds that open up the back of the house — we fit them all.
Composite Front Doors
GRP-skinned composite doors with insulated cores. 24+ styles, 1,500+ colours. Hallmark's flagship range.
uPVC Back Doors
Practical, secure back doors with multi-point locking. Cleaning glass, half glazed or solid panels.
French Doors
Classic double-opening doors with full glazing. Perfect for opening up the back of the house onto a patio or garden.
Patio Doors
Sliding patio doors in slim aluminium or uPVC. Big glass, minimal frame, smooth one-finger operation.
Bi-Fold Doors
Concertina-style doors that fold back to open a whole wall. Up to seven panels — proper indoor-outdoor living.
Aluminium Doors
Modern slimline doors in powder-coated aluminium. Any RAL colour. Maximum glass, minimum frame.
Official Hallmark Stockist
Designed by Hallmark. Fitted by Clarendon.
Clarendon is a Hallmark-authorised stockist. Hallmark are one of the UK's most respected door manufacturers — their composite doors come in 150+ styles, 1,500+ colours, with full hardware customisation. Each door is built to order. We fit every one personally.
Design Your Door
Build it. Then we'll quote it.
Use Hallmark's designer to choose your style, colour, glazing, glass design, hardware and finish. Save your design, then bring it to us for a free survey and proper quote.
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Security & Durability
Police-approved security. Built to last.
Security
Secured by Design as standard.
- PAS 24:2022 compliant
- Secured by Design (Police-approved) standard
- Multi-point hook-and-deadbolt locking
- Anti-snap, anti-bump, anti-pick cylinders
Police-approved security as standard.
Durability
Built to last decades.
- Insulated GRP and foam-core composite
- U-values from 1.0 W/m²K
- 10-year colour and structural guarantee
- Won't warp, swell, fade or rot
Maintenance-free for decades.
How it works.
Five steps. No pressure, no commission salespeople.
01
Enquiry
Drop us a message or call. We'll book a free survey for a time that suits you.
02
Free Survey
We come and measure your existing door opening, talk through the options, and bring samples if you want to see colours and hardware in person.
03
Quote
A clear, written quote — no pressure, no upselling. Take your time.
04
Install
Our fitters arrive on the agreed date. Cleanly removed, cleanly fitted, mess cleared as we go.
05
NAPIT Registration
We register your installation with your local council and provide your insurance-backed guarantee.
Recent door projects.
Our gallery is coming soon. In the meantime, browse what we've been up to on our Facebook page or Instagram →
Why Clarendon
A quarter-century of doing it the right way.
Family-run since 1999
Three generations of craftsmen. The same name on the van as on the paperwork.
TrustMark & NAPIT registered
Independently vetted. Government-endorsed. Your deposit and workmanship are protected.
10-year guarantee
On every installation. Backed by insurance — not just a promise.
Essex, Kent & London
Local installers, local knowledge. We've been working these streets for 26 years.
Flexible finance
Spread the cost.
Keep the standard.
Interest-free and low-rate options available on most projects, subject to status. No-deposit plans on selected installations.
0%
APR available
10yr
Workmanship guarantee
26yr
Family-run track record
£0
Deposit options
Frequently asked.
Thinking about your next home improvement?
No hard sell. No pressure. Just an honest conversation about what you'd like to do — and what it would take to do it properly.