Dublin's trusted house extension builders transforming homes with beautiful, functional living spaces. From single-storey rear extensions to stunning double-storey additions, we create extra space that seamlessly blends with your existing home.
Need more space but love your location? A house extension in Dublin is the perfect solution. J&G Conwell Construction has been helping families across Dublin and Ireland extend their homes for over two decades. As experienced extension builders, we understand that your home is your sanctuary, and adding extra space should enhance your lifestyle without compromising on quality or design.
Whether you're dreaming of a spacious rear extension for an open-plan kitchen-living area, a double-storey extension to add bedrooms and bathrooms, or a beautiful sunroom to bring the outdoors in, our team delivers exceptional results. We work with homeowners throughout Dublin to create extensions that feel like a natural part of your home—not an afterthought.
Our reputation as leading house extension contractors in Dublin is built on quality craftsmanship, transparent pricing, and a commitment to minimising disruption to your family. From initial design consultation and planning permission through to final finishes, we manage every aspect of your extension project, ensuring a stress-free experience and a result that transforms how you live.
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"Our rear extension completely transformed our home. The team was professional, tidy, and finished on time. We now have the open-plan living space we always dreamed of!"
— The O'Brien Family, Terenure
From compact single-storey additions to transformative whole-house extensions, we deliver tailored solutions that maximise your space and add value to your Dublin home.
The most popular choice for Dublin homeowners, single storey extensions are perfect for creating open-plan kitchen-diners, larger living rooms, or ground-floor bedrooms. Many qualify for exempted development, saving time and planning costs.
Maximise your investment with a two storey extension that adds significant living space. Ideal for growing families needing extra bedrooms, bathrooms, and living areas while making efficient use of your garden footprint.
Transform your kitchen and living space with a stunning rear extension. Perfect for creating that dream open-plan layout with bi-fold doors connecting your home to the garden, flooding your space with natural light.
Make use of wasted space with a side return extension. Ideal for Victorian and Edwardian terraces in Dublin, these extensions utilise the narrow passage alongside your home to create significantly wider kitchens and living areas.
Bring the outdoors in with a beautiful sunroom extension. These light-filled spaces are perfect as additional living rooms, dining areas, or home offices, providing a connection to your garden while staying warm and comfortable year-round.
Combine rear and side extensions for a dramatic wrap-around extension that maximises space and transforms your entire ground floor. Perfect for creating large, flexible living spaces that work for modern family life.
Get a free, no-obligation quote for your house extension. Our team will visit your home, discuss your ideas, and provide expert advice on maximising your space.
When searching for house extension builders near me, you need a contractor who understands Dublin homes and delivers exceptional results. Here's why homeowners choose J&G Conwell Construction.
As established extension builders in Dublin, we've completed over 400 house extensions across the city and suburbs. We understand Dublin's housing stock—from Victorian terraces to modern estates—and know what works best for each property type.
We guide you through exempted development rules and planning applications. Our experience with Dublin local authorities means we know what's likely to be approved and can advise on designs that maximise space within regulations.
No hidden extras, no budget surprises. We provide detailed, itemised quotes with fixed pricing so you know exactly what your extension will cost. Any changes are discussed and agreed in writing before proceeding.
We plan carefully so you can stay in your home during construction. We work cleanly, contain dust and debris, maintain access to essential rooms, and minimise disruption to your daily routine as much as possible.
From groundworks to painting and decorating, we handle everything. Our team includes all necessary trades—structural, electrical, plumbing, plastering, tiling, and finishing—so you have a single point of contact throughout.
We use quality materials and skilled craftspeople who take pride in their work. All our extensions are built to exceed building regulations, with proper insulation, ventilation, and waterproofing, and backed by comprehensive warranties.
From initial idea to moving into your new space, we follow a proven process that ensures your house extension project runs smoothly and delivers the results you're dreaming of.
We visit your home to understand your needs, assess the property, and discuss ideas. We'll advise on what's possible, planning requirements, and provide initial cost guidance so you can make informed decisions.
Our architectural partners create detailed designs. We handle planning applications if required, or confirm exempted development compliance. You receive a comprehensive fixed-price quote before any commitment.
Our skilled team builds your extension efficiently while you continue living at home. Regular updates keep you informed, and our site manager ensures quality at every stage from foundations to finishing.
We conduct final inspections, address any snagging items, and ensure everything is perfect. You receive all certificates, warranties, and documentation—then it's time to enjoy your beautiful new space!
As Dublin's trusted house extension company, we've transformed homes in every corner of the city and surrounding areas. Our local knowledge means we understand the specific characteristics of Dublin's housing stock—from period properties in Rathmines to modern homes in Lucan.
Whether you own a Victorian terrace in need of a side return extension, a semi-detached home perfect for a rear extension, or a detached property with room for a two-storey addition, we have the experience to deliver outstanding results.
Searching for house extension builders near me? Our team covers all Dublin postcodes and surrounding counties. Contact us to discuss your project wherever you're located.
We also undertake house extension projects throughout Leinster, Wicklow, Meath, Kildare and beyond. Contact us to discuss your location and get a free consultation.
Have questions about extending your Dublin home? Here are answers to the most common questions we receive from homeowners planning house extensions.
Ready to create more space in your Dublin home? Whether you're planning a rear extension, side extension, or double-storey addition, our team is here to help. Contact us today for a free home consultation and discover how we can transform your living space.
Tell us about your extension plans and we'll arrange a free home visit to discuss your options.