House Extensions

First Class Building

We Build Fine Quality House Extensions In Dublin

Contact Us086-105-1244

House Extensions

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 Dublin

Kitchen Extension Added To Home

House Extension Builders

First Class Building are fully qualified home renovation experts with high quality attention to detail and cost effective work. If you’re looking for experienced, sought after extension builders then we’d be happy to hear from you.

Whether your home is detached, semi detached or open plan, we can make it exactly as you’d like. We ensure your home is energy efficient and the extension cost is kept to a minimum without compromising quality.

We’ll discuss your extension ideas and together plan the type of living space you want

Easy House Extensions

We can fully manage your project to your specifications.We are the complete building solution. Among other things we:

  • Supply all materials.
  • Provide advice and support on extension design, planning, permissions and regulations.
  • Install heating and plumbing.
  • Prepare all foundations, surfaces and supports.
  • Are experts in roofing, carpentry, flooring, doors and windows.

Why Choose First Class Building?

Competitive Pricing

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

First Class Building work to the highest standards and is a registered building contractor that complies with Irish building regulations and has employee and public liability insurance.

A Certificate of Compliance is Issued by a qualified architect when structural alterations have been made to comply with Irish building regulations.




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