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Our Services

Extensions & Conversions

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Why Choose Us?

An extension can add space and value to your home for you or for growing families. Why move when you can add the space you need and value to your home. GND Construction are a general building firm with over twenty years experience. GND Construction are Dublin based and service the Dublin area and surrounding counties.

GND CONTRUCTION DUBLIN are an honest, reliable, experience building company who always ensure that all work is completed to the highest possible standards – no exceptions. GND Construction has built up a great name in Dublin Construction for good reason! All work carried out by GND Construction is personally managed by Gavan Duffy to ensure that every aspect of the project is finished to perfection. Gavan is a perfectionist in everything he does and it is one of the many reasons that his customers will always choose him again and again for all their building and demolition needs. GND Construction, Dublin is renowned for quality work, top class customer service and honest, affordable, prices. GND Construction is fully insured and ensures safety and good work practice is paramount in everything his experienced team does.

Who Are We?

GND CONSTRUCTION DUBLIN was set up over 15 years ago to provide honest, reliable, building to the Dublin area and beyond. We have built our name as a company who always ensures to give the best possible prices without any lapse in the standard of our building work. We have great relationships with building suppliers all over Dublin and pass on our discounts to all our valued customers. A our work is always completed to the highest possible standards – no exceptions.

GND Construction has built up a great name in Dublin Construction for good reason! The company was founded by Gavan Duffy who has been providing excellence in building for over 20 years. It is this background that has ensured that his attention to detail and high end finishes was paramount, right from the start.



I confirm that I have retained GND construction on a number of projects in the past. These projects include:

  1. The construction of  a new-build investment property.
  2. the complete refurbishment of my office premises involving sensitive restoration of a listed Georgian building while my legal practice business was being carried on in a portion of it on a continuous basis.
  3. The urgent refit of a retail clothing boutique in Howth.
  4. An extension to my family home and associated works.

I found the work to be of a very high standard and carried out in all instances on time and within agreed budgets. I have recommended this firm to a number of my clients and have received only positive feedback.  I have no hesitation in recommending them for similar projects.

Kieran Murphy.

GND built us a large family room extension,converted our attic,which involved removing a section of the roof,and carried out extensive renovations to the rest of our home,including a new heating system and a complete electrical rewire. The work was all completed on schedule and to a high standard. We would recommend them to anyone.

Gavan was recommended to us by friends who he had built an extension for. All the lads were very friendly and helpful and we were delighted with the work they did for us and have already passed their number onto family and friends.

Our house was in need of a lot of work when we bought it. GND gave us a costing they stuck to and consulted us at every stage of the job.We are very happy with all the works carried out.

Gavan is very easy to deal with. We made some changes during the works which was not a problem,he listened to our needs and advised us on the best course to take.We would recommend GND to anyone and are already planning our next project.

GND had already completed three extensions on our street so the choice was easy and simply to make. We are delighted with our new room and would be happy to recommend them to anyone.

We had a previous bad experience with some works we had done so we were very careful with the choice this time. GND were prompt,polite and trustworthy. The finish on our extension was excellent.

We have employed the building and carpentry services of Gavan Duffy of GND Construction on and off since 2003 and have found the individual and company to be honest,conscientious and punctual. Their work has always been up to the high standards that we and our clients expect,and in doing so we have no concerns in recommending the company for building works described within their manifesto.

I confirm that I have been dealing with Mr Duffy and his company for the past ten years. His work is of the highest standards.

I had my attic converted last year and was more than happy with how it turned out. I would totally recommend GND construction,they were punctual,efficient and affordable and had the work done in the estimated time they had given me at the start.I was very happy with the quality of the work and the way in which it was carried out.

Had an extension done by GND recently and I have no complaints. An excellent job.

This letter is to confirm that I have engaged GND construction on two separate occasions,the first one being an extension of 40 m2 on my own residence and the second being a detached bungalow from ground level,both of which they dispatched within the agreed budget and time frame. On each occasion I found all their employees to be extremely courteous and professional and were well supervised.It is on this basis that I have no reservations in recommending accordingly,please contact me if I can be of any further assistance.

Gavan and his team did a major structural refurbishment for me in 2013. This included a huge amount of work including, demolition,building, carpentry,windows,plastering and electrical work.He oversaw the whole project and liaised with my kitchen fitter as necessary.We found Gavan to be polite,friendly and professional with all our dealings with him and we wouldn’t hesitate to use him again.I have already recommended him to family and friends and would recommend his services to anyone.

We had an extension build by GND construction last summer at our home in Citywest,Dublin.It is new sitting room with french doors and two skylights at the back of the house.We found Gavan and the lads to be very professional,helpful and polite.We are very happy with the job and have recommended him to our families and friends.

Gavan was recommended to me,my home was in need of lots of refurbishment which included the dining room and kitchen converted to an open plan room,plastering,total rewiring,new windows and attic insulation. I was nervous about getting these jobs done but once I met the guys I knew my home was safe with them. As with any job unexpected eventualities appear but the guys kept me informed and did exactly what they were asked to do (and more).As with any building job there is lots of dust and rubble,however each evening the guys tidied away their tools and made my life stress free while they were working in my home.I highly recommend their skills and professionalism. Thank you so much.

Gavan recently completed a kitchen extension for us.We found them highly professional in their manner and work.We will have no hesitation in using them for future work.

We employed Gavan to do a refurb and extension on our house. The job was completed on time and to a very high standard.We found all their employees and subcontractors to be very easy to deal with and very efficient in their work.The small snag list that there was,was taken care of within two days of it being issued.I would highly recommend them.

I recently had an extension built on my home and used Gavan to complete the job.I am extremely satisfied with the professional service that was provided right from the first point of contact to the end product.The job was done to a very high standard and the lads are very pleasant and reliable. If I have work carried out on my home in the future I would certainly use them again and would highly recommend them too.

Gavan converted our attic space into a wonderful extra bedroom. They were on time everyday and very polite. The room we have now is fantastic and is finished to the highest of standards. They finished the entire job when they said they would and I would have no hesitation what so ever in recommending them.

Highly recommended company. After getting a number of quotes for an extension onto our house,we felt was Gavan was the best priced and most professional company we contacted.They were on time,polite and friendly and very easy to deal with.The work was carried out to the highest standard and was fully completed within four weeks.We cannot recommend this company highly enough and will use them again in the future.

Last year after returning from holidays late on a Saturday evening. We discovered a severe leak on our roof. Gavan came out that evening and did a temporary repair until Monday morning at which time they brought all the necessary materials which was done to the highest standard. I cannot recommend them highly enough.

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