First Class Building

House Extensions

We Build Fine Quality House Extensions In Dublin

Contact Us086-105-1244

First Class Building

Extending Homes In Dublin

We Build The Finest Quality Extensions To Homes And Businesses In Dublin

Finest Home Extensions

Welcome To First Class Building

At First Class Building we specialise in all types of House Extensions. If you are looking to add some real additional value to your property while increasing space and creating a better living environment then one of our house extensions is the ideal solution.


We can provide: Rear extensions, front extensions, sunroom extensions, double height extensions, wrap around extensions or upstairs extensions.

We can work closely with your Architect and project team to ensure your extension is finished to the highest quality.

Call us for a no obligation quote or to find out more on 086 105 1244

House Renovation Terenure

Full House Renovation in Terenure, Dublin 6

Full House Renovation Clontarf

Full House Renovation with rear and side extensions

Home Extension

Kitchen Extension Added To Home

Why Choose First Class Building?

10 Year Guarantee On All Work

Our Experience, Quality & Value

Viewings Of Past Customers’ Work Can Be Arranged

Full Project Management Included

Health and Safety Report Provided

All Our Materials Are Certified & Of The Highest Quality

Member of The National Guild Of Master Craftsmen

Over 15 Years in Business

Get A Professional Inspection & Free Quote

We provide a complimentary professional consultation & quotation. If you are looking to convert your attic, add an extension or refurbish your home then call us on 086 105 1244.

We Can Arrange For You To See Some Of Our Completed Work

For those who would like to see first hand what we have done for other homeowners we can arrange a visit to a past project.


Architects Certificate of Compliance

We work to the highest standards and can provide an architect who will certify all works done.



Over 15 Years Experience


Fully Insured


References Available


Project Management Included

Request A Free, No Obligation Consultation

Call Us Today On  0861051244 To Find Out More