Front Doors

EXPERT INSTALLATION, MARKET LEADING BRANDS

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Garage Doors

MANUAL, AUTOMATED, UP AND OVERS, ROLLERS, SECTIONALS & SIDE HINGED...

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Bifold Doors

BRING THE OUTSIDE IN

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30 Years+ Experience

Large Product Catalogue

First Class Customer Service

Quality Assured

Welcome to SDM Doors

Your Local Specialist for Garage, Front & Bifold Doors in Hertfordshire

At SDM Doors, we’re a trusted, independent, family-run business dedicated to delivering expert door installation across Hertfordshire and the surrounding areas. With years of experience and a reputation built on quality workmanship, we take pride in offering a truly personal service — from your first enquiry right through to final installation.

We supply and install a wide range of premium products, including garage doors, front doors, and bifold doors, all available in modern, traditional, and bespoke styles. Whether you’re upgrading the look of your home, improving security, or increasing energy efficiency, our expert team can guide you to the perfect solution.

If you’re looking to convert two single garage doors into one double door, our structural alteration service includes the safe removal of centre piers and installation of RSJ lintels — all handled by qualified professionals to ensure strength, safety, and a flawless finish.

Want to see some of our work?

VIEW CASE STUDIES

SERVICES

Garage Doors – Up & over, roller, sectional, and side-hinged designs to suit every property. Supplied and installed.
Front Doors – Supply and installation of composite and aluminium front doors for style, security, and insulation.
Bifold Doors – Transform your living space with stunning bifold doors supplied and fitted by SDM Doors.
Structural Alterations – Expert garage door conversions and lintel installations for wider openings.

WHY SDM DOORS?

Over 30 years experience
Family-run and customer-focused
Fully qualified, insured, and experienced installers
Huge range of styles, finishes, and colours
Free site surveys and honest advice
Serving homeowners across Hertfordshire, Bedfordshire, Buckinghamshire and beyond
All major door manufacturers stocked.

ORDER PROCESS

Contact Us

Get in contact with us to discuss your requirements

Estimate

Receive an estimate or book a survey with one of our fitters

Quote

Receive a Final quotation and place your order

Order Complete

We will now agree an installation date with you

Job Completed

Complete the installation of your chosen product

Our products and services

Garage Doors

We work with all the leading manufacturers so we can provide you with an unrivalled choice of garage doors.

Front Doors

Whether you are looking for a contemporary or traditional look, all of the front doors we supply are backed by expert engineering, have outstanding thermal values and meet the highest security ratings.

Bi-Fold & Sliding Doors

We supply and fit a number of sliding doors and bi-fold door varieties. All our bifold doors are of the highest quality and fitted to industry standard.

Structural Alterations / Double Garage Door Conversion

We specialise in structural alterations and garage conversions. All the building work is done via our own team and is not sub-contracted out to a third party.

Garage Door Repairs

Here at SDM Doors we like to boast an unrivalled wealth of product knowledge and provide a Garage Door repair service that is second to none. Our installers carry a wide range of spares, as we aim to repair your garage door on our very first visit.

Customer Reviews

“

Very good overall: Scott and the team were helpful and knowledgeable during quote stage, kept us up to date while the unit was manufactured (3 week lead time), arranged fitting promptly, and on the day were highly efficient, neat, tidied up after themselves and left us with a fantastic finished product - highly recommend
CustomerSt Albans

“

SDM Doors did a fantastic job in replacing my garage door and I can wholeheartedly recommend them. Scott was friendly, polite and knowledgeable, and his workmanship was of the highest standard. After some early indecision on my part Scott was happy to submit a revised quote and, wisely as it turned out! Come back for a second survey. The price for the door replacement was very competitive and the work was carried out promptly and with great attention to detail.
CustomerBerkhamsted

“

Fast extremely efficient, very friendly. Job well done. Couldn't fault a single thing.
CustomerLeighton Buzzard

“

Scott was a pleasure to deal with and did a fantastic job on our new front door. Charlotte kept us updated at all times. I would highly recommend this company.
CustomerWatford

“

Very polite, good communication, very organized. Extremely satisfied with the work. Highly recommended.
CustomerKings Langley

“

Brand New Personnel Door, made opening in brick work, repaired existing damaged bricks and fitted new door. Great work by Scott, Seb and Charlotte. A job well done and thank you very much, highly recommend. Second time I have used SDM over the past 10 years.
CustomerAylesbury

“

Truly delighted with the service. Scott promised me the moon when he gave us a quotation and delivered more! Everyone who visits us comments on how beautiful the door looks! Charlotte kept us posted on the manufacturing lead-time and estimated delivery date. On the scheduled day, Scott and his assistant Sebastian arrived on time, worked tirelessly and finished the job ahead of the estimated time. They even fixed the outdoor lights for me. The job was done with utmost cleanliness and perfection. No room to find any fault. Thank you SDM Doors! May your business flourish!
CustomerAylesbury