If you are going to build an extension or make other changes to your house, best to discuss with experts. FMC Ultratech are one of the leading extension builders in Dublin and can guide you through the process extending or refurbishing your property.

Extension Guide

Generally minor changes such as those listed below do not need planning permission:

Rear Extension

Building an extension to the rear of the house which does not increase the original floor area of the house by more than 40 square metres and is not higher than the house. The extension should not reduce the open space at the back of the house to less than 25 square metres.

Garage or Side Extension

Converting a garage attached to the rear or side of the house to domestic use provided it has a floor area of less than 40 square metres.

Front Porch Extension

Building a front porch so long as it does not exceed 2 square metres in area and is more than 2 metres from a public road or footpath.

These are guidelines only; it is most important to consult with us before starting to make any changes.

Extend v Move

Well-designed house extensions can transform even the humblest of homes by maximizing the floor-plan and adding to the market value.

Considering today’s house prices as well as tallying up the costs of moving (think solicitor’s fees, stamp duty, house movers and van hire), improving what you’ve already got can be a more appealing and affordable route to creating a living space that meets your family’s needs.

Why Us

Our expert builders and tradespeople deliver services tailored to your needs, working closely with you to ensure your total satisfaction with the results. With our significant experience and extensive skillset, we can bring your dream home to life.


As professional extension builders, we manage projects from start to finish, from the initial conception through to completion. We can source all the materials required for the build and offer services for competitive prices. Whether you simply need more living space, or you desire something high spec, we deliver professional results. Just a few aspects our extension building services cover include:

Building Work








Window Installation

Door Installation

Kitchen Fitting

Bathroom Fitting


Arrange a Quotation

Arrange a quotation for a house extension today by giving us a call. The cost of your build will reflect the high standard of service you will receive, though we always make our prices competitive.