Sarah Costelloe is the creative director and owner of HausOlogy Design Studio based in the beautiful seaside village of Malahide, North Co. Dublin.


Sarah has over 25 years of business experience having worked with global multinationals for most of her career and also has experience in project management which enables her to bring her projects to life.

She has a degree in Business & Marketing and a Post-Grad Dip (Hons) in Interior Design.

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's passion for Interiors, furniture design and art made it an easy decision to move into interior design as a full time career. 

Her love of photography as a hobby enables her to see things through a different lens and to fully understand layout and composition.


Sarah promotes design for health and wellness, by designing spaces to ensure your home is a stress free, relaxing environment for easy everyday living.



Sustainable Design


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 is comes to each material and furnishing option, but its understanding which are truly more sustainable and eco-friendly.

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 lifetime lasting products, use more natural products for furnishings and furniture, and upcycle existing furniture where it makes sense.