Our Mission

We will take on any job in your home and approach every building job with the attention to detail and dedication to quality for which we are known. W. Dempsey Builders can carry out any construction service you require.

We do work on any scale, from a garden wall up to a complete house. We are happy to help you with any building work you need carried out in your home and all building work is carried out with our characteristic attention to detail and dedication to quality.




We carry out building work for extensions to the highest standard, ensuring that your extension melds seamlessly with the existing building. Extensions can be added to any home to provide living room.



Whether you want to renovate your entire house or just transform one or two rooms, we are happy to carry out work on any scale. W. Dempsey Builders can change your kitchen, bathroom, sitting room – any room in your house that requires a change.

New Homes

New Homes

W. Dempsey Builders will carry out all the work necessary to turn your dream house into a reality. We cover basic construction – including laying foundations, block-laying and plastering – plumbing, electrical wiring, and all other tasks necessary to build your one-off house.


PVC Fascia & Soffit

Fascia and soffit are essential to give your home the right finish and to ensure it remains watertight. PVC fascia and soffit are the most popular choice for home installation as they are of excellent quality and will protect your house for years.

Property Maintenance

Property Maintenance

At W. Dempsey Builders, we understand that maintaining your property can be time-consuming. We take the pressure off by carrying out all work for you. We can carry out repairs to your house, mend or replace fascia and soffit, redo plastering and all other general property maintenance building work.

Garden, Outhouses, Sheds

Garages & Outhouses

Not every domestic construction project is to build a house. W. Dempsey Builders understand that sometimes you need a solid building away from your house for storage, vehicles and sporting goods. We approach the construction of garages, outhouses and sheds with the same dedication which characterises our construction of new-build homes.

About Us

W. Dempsey Builders was established in 1992 by William Dempsey. William has over 43 years’ experience in the construction industry, serving his carpentry apprenticeship with J Sisk & Sons Builders between 1973 and 1978. Over the years W. Dempsey Builders has worked hard to develop their reputation for high-standard building work, quality craftsmanship and excellent customer service.

W. Dempsey Builders are fully tax compliant so the tax clearance certificate as well as insurance certs can be provided on request.

Specialists in Home Building, Extensions & Renovations, W. Dempsey Builders provide a professional and friendly domestic building service in Dublin and Kildare. In business for over 23 years, we have extensive experience in the construction industry. We offer a range of services including extensions, renovations, property maintenance and one-off house builds. We pride ourselves on carrying out all our building work to the highest standards, give you the home you have always imagined.

W. Dempsey Builders can take your plans for the perfect home and turn it into a reality. We will work closely with you to ensure that all construction work, whether a full extension or replastering a wall, is as you and your family want it. W. Dempsey Builders endeavours to complete all building projects on time and for excellent value.

We will take on any job in your home and approach every building job with the attention to detail and dedication to quality for which we are known.


    New Build Unique Homes

    Sun Room

    PVC Fascia & Soffit Installation

    Garden Walls & Bricklaying


    Property Maintenance

    Attic Conversions

    PVC Gutters & Drains Installation

    Retaining Walls for Garden Projects


"W. Dempsey Builders extended our bungalow to double its size. A complete refurbished job was carried out, very professionally run, very clean, completed in the time frame given, no hidden extras, can recommend 100%." John Bennett
"Very satisfied with the quote and work completed. William gave me options and I relied on his experience. Small problem with phone line after the work was done and William came back out and repaired the line. Would happily use William for any other DIY jobs." Dave Kinsella
"A while ago I rang Willie to talk about doing an extension on my kitchen. He came out at a time that suited me, spent some time looking around and gave me a quote. I got several quotes and Willies quote was the best. I rang a lot of people Willie had done work for and found that they were more that pleased with his work. He arrived every morning at 8am, and worked solid for the day. Willie and his expert team are excellent. They are curtious, honest and trustworthy. My wife and I actually enjoyed having them in our home. It was a pleasure to get Willie and his team and we consider ourselves lucky that he completed our extension. He is a man of his word and an excellent worker. The standard of his work is second to none, his manor in which he dealt with all our queries and worries is a true credit to him. They say it can be stressful getting work done in your home and it is, but Willie always put us at ease. I would recommed W.Dempsey Builders to anyone, and I will use them again. It's hard to find people like Willie these days, but its comforting that they do still exsist." Philip & Daisy Walker
"Excellent and extremely prompt service. Was able to diagnose leak problem and rectified same next day. Even cleaned out gutters without being asked!! Fantastic" Alan Duggan
"Willie did an extension for me. His team of workers were second to none. They did an excellent job which we are very satisfied with to date. They all worked hard and finished in record time. Willie was a pleasure to have around and was good at advising on what we needed. I strongly recommend W.Dempsey Builders." Myles Duffy
"William was very easy to work with and did a good job without any messing or delay. I would have no problem hiring him again or recommending him to any of my friends." Tom Bambury
"Dempsey Builders built a large extension , consisting of large kitchen, bedroom, dining room ,downstairs toilet and an office. These builders are excellent , punctuality was fantastic, price was very very competitive," Jerry Ryder
"Willie resealed and painted our old cast-iron gutters and put some few hours crow guards on our chimneys. He's friendly and did a great job in just a and I'd recommend him to anyone." Caroline, D7
"We hired Dempsey Builders to do a front extension for us. These guys are very professional, trustworthy and their work is the best I've seen. Excellent, finished on time, no fuss 100% delighted, " Martin Ryan
"I like a good finish and William provided just that. Nothing was any trouble and a nice man in to the bargain." Chris Lyons
"First class service and high standard of work. I look forward to doing business with Willie again - Highly recommended." Paul M
"Willie did a couple of jobs for me including replacing my guttering etc. He's great, no problesm with the job, during or since.He was quick, tidy and very easy to work with. I outlined the job to be done, we discussed the options and agreed what had to be done. For a pleasant change I'm happy to say all went smoothly. I will be calling him again if I need other work done and am happy to recommend him to others." Lynda Hendley
"Job was to replace flat roof extension, dry line kitchen, skim bathroom, box in boiler and plaster ceiling in landing. Willie and his crew were very polite. they had great attention to details, and took great pride in their work. There was a few extra jobs carried out at no extra cost, and Willie actually rang up informing me that some beams didn't have to replaced which lowered the price. I'd recomend them to friends and family and would use the company again." Brian Magee
"Whenever we need any kind of building work done in future we will just call Willie, which shows just how delighted we are with every aspect of dealing with Dempsey Builders and the fine first job they have just completed for us reroofing a single storey extension. We cannot recommend them too highly." P & M Spencer
"W. Dempsey Builders did a large extension for me, work is excellent finished job in time given, clean, honest and professional, end result better than expected. 5 star rating" Marie Kenny
"This is our third time to use W. Dempsey Builders. We found them to be very professional, punctual, trustworthy, a great team of highly trained tradesmen. Spotless clean, completed each project on time, no hidden extras. Brilliant !" M. Jones

Contact us



Riverbank Lodge

Dunlavin, Tober Co. Wicklow



+353 45 401 097

+353 87 242 9881



W. Dempsey Builders