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About us

HausOlogy Design Studio is an interiors design studio based in the beautiful seaside village of Malahide, North Co. Dublin.

We are passionate interior designers who believe that good design can make a positive difference in the world and in our clients lives. We specialize in creating sustainable and beautiful spaces that reflect the personality and needs of our clients, whilst enhancing and protecting your health and wellbeing.

Sarah Costelloe is founder and creative director of HausOlogy Design and is a qualified Interior Designer , a graduate of the Interior Design Academy of Ireland. She has 25 years of business experience and several years in project management. She is a member of the Interiors Association of Ireland - a multifaceted organisation which supports professional accredited designers in Ireland, ensuring adherence to a professional code of ethics. Sarah has always had a love of art & design from a young age, which stemmed from her mother who is an artist and a collector of antiques.


Sarah has also completed a course on the principals of Biophilic Design (a concept used to improve our connection to the natural environment) and looks to adopt these principles where possible in her designs.

We are happy to collaborate with you at any stage of your project, (although earlier is best) and our services range from interior design consultations through to full implementation and detailed project and design management, bringing with us a team of very trusted and skilled trades. 

Our Commitment To Sustainability

We know now more than ever how precious our planet is, and Hausology Design is committed to presenting our clients with the more sustainable options when it comes to designing their home. There are many choices available when it comes to each material and furnishing option, but it's understanding what is really behind this with the various suppliers and materials.

We consider every supplier we use and look into each of their manufacturing processes to understand their commitment to sustainability. We urge our clients to buy better with products that have longevity, use more natural materials for furnishings and furniture, and upcycle existing furniture where it makes sense.

Furthermore, we are helping to tackle climate change by our membership with Greenspark, which is an organisation doing great things to help reverse the negative impacts of climate change.

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Get In Touch

Get in touch if you would like to receive a quote on a forthcoming project, or would like to discuss future projects.

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