Covering Derry/Londonderry and nearby
For drive unit replacement, coverage around Derry/Londonderry is set by postcode and includes the BT47 and BT48 postcode districts, as well as nearby addresses in County Londonderry. Specialist engineers working under our management attend each site, and the price is agreed in writing beforehand.
Town-centre buildings in Derry/Londonderry range from modern units to older shopfronts. Older frontages can have uneven floors, limited head height and timber frames that need checking before an operator is fitted or adjusted, and the engineer looks at these on site.
Nearby towns we also list for drive unit replacement (straight-line distance): Strabane (13.6 miles), Limavady (14.7 miles), Coleraine (27.1 miles), Omagh (27.5 miles).
What to think about for drive unit replacement in Derry/Londonderry
- Older shopfronts in Derry/Londonderry may have headers made for discontinued operators. Adapter plates usually allow a new drive unit to fit, which the survey confirms before you commit.
- Ask for the paperwork. A converted door should come with its risk assessment, Declaration of Conformity and user instructions, which belong with your building and maintenance records.
- Worn floor guides and rollers can shorten the life of a new operator. It is often worth replacing them during the same visit rather than coming back later.
- Check the power supply. A dedicated fused spur and isolator near the door is usually needed, and older installations sometimes need electrical work before the new operator goes in.
- Heavy glass leaves need an operator rated for their weight. The survey records the size and glass type of each leaf so the right drive unit is specified.
Drive unit replacement in Derry/Londonderry: guide prices
The site survey is free, including the measured drawing and a fixed, itemised written quote. Guide price: typically £1,995 to £3,995 ex VAT.
| Item | Guide price | Notes |
|---|---|---|
| New drive unit on an existing automatic sliding door | £1,995 – £3,995 | existing leaves kept, installed, ex VAT |
| New operator on an existing automatic swing door | £1,795 – £3,995 | installed, ex VAT |
| Sensors replaced at the same time | £195 – £495 | per sensor, ex VAT |
Standards and rules in Northern Ireland
Whoever motorises a manual door, or builds an automatic door from separate parts, may take on the manufacturer’s legal duties for the finished door: a risk assessment, a technical file kept available for the authorities, a Declaration of Conformity, the conformity marking and instructions. You receive the Declaration of Conformity and the instructions at handover. In Northern Ireland machinery, including a new or converted powered door, carries the CE marking (with UKNI added where a UK body carried out the conformity assessment), and the EU Machinery Regulation applies there from 20 January 2027.
Workplace law (the Workplace (Health, Safety and Welfare) Regulations (Northern Ireland) 1993) expects powered doors to have suitable and effective features to stop them trapping anyone and, where needed for safety, to open by hand unless they open automatically if the power fails. Doors at work must also be kept in efficient working order under a suitable system of maintenance.
How it works
- Get in touch. Call, email or use the form with the address and what you have in mind. If you are not sure which type of door suits, describe the entrance and we will suggest the options worth considering.
- Survey and advice. The survey costs nothing and carries no obligation. The engineer checks the site and explains which options suit the entrance, the people using it and the budget, before anything is priced.
- Quote in writing. You receive a fixed, itemised quote for drive unit replacement in Derry/Londonderry, covering equipment, installation, testing and handover, with the lead time and payment stages set out clearly.
- Install, test, explain. The engineer installs and commissions the door, tests the sensors, safety functions and emergency behaviour, and walks you through the controls. The handover pack records what was installed and tested.
Book a free survey in Derry/Londonderry to find out whether a new drive unit will bring your automatic door back to reliable use. The quote is fixed and itemised.
Drive unit replacement in Derry/Londonderry: questions
Do you provide paperwork for the converted door in Derry/Londonderry?
Yes. When we fit a new drive unit we prepare the paperwork for the finished door, including the risk assessment, Declaration of Conformity and user instructions, and hand it over with the test results and settings. It belongs with your building records.
Can you give me a price for drive unit replacement in Derry/Londonderry?
Our guide is £1,995 to £3,995 excluding VAT (per door), the same guide prices we use across the UK. The free site survey in Derry/Londonderry confirms the price as a fixed, itemised written quote, and the guide price tool gives you a range before anyone visits.
Can the replacement in Derry/Londonderry include a service plan?
It can. After the changeover we recommend a service interval based on how heavily the door is used, and a service contract can be set up with a written record of each visit. Servicing is priced separately and agreed in writing before any visit takes place.
Will you remove the old operator from our premises in Derry/Londonderry?
Yes. The old drive unit, sensors and any other replaced parts are taken away as part of the job, and the work area is left clean. Disposal is included in the fixed quote, so there is nothing extra to arrange or pay for afterwards.
What should I send before the survey in Derry/Londonderry?
A few photos of the door from inside and outside, rough measurements of the opening, the address and a note of how the entrance is used. If the door already has an operator, a photo of any label on it helps. With that, the engineer arrives prepared, the survey takes less of your time and we can put the quote for drive unit replacement together more easily.
Will the building stay secure while the entrance is being changed?
We plan to keep the entrance usable or secure throughout. Where a door has to come out, the work is sequenced so the opening is closed up before the engineer leaves, or a temporary door or hoarding is arranged when a longer gap cannot be avoided. How this is handled for your site in Derry/Londonderry is agreed before work starts.
What do the building regulations in Northern Ireland say about powered doors?
The Building Regulations (Northern Ireland) 2012 require a powered door to have a means to prevent it trapping anyone and a means to open it if the power fails. Guidance on access is in Technical Booklet R, and new entrances need building control approval.