"...We believe good design, should not equate to a costly build".

- Ernest Tsui 2012 -

Ernest Tsui Architects + Partners is an award winning RIBA Chartered Practice specialising in quality high-end residential design for London and the South-East, UK.  Our studio based architecture and interior design firm successfully deliver development projects and bespoke residential architecture in response to our client's needs. We achieve high quality design through our rigorous and collaborative design approach married with strategic thinking on project cost.  We know that good, creative and efficient design does not necessarily lead to an expensive build and we are meticulous about listening to your brief and delivering a tailor-made solution to suit your needs.

Extension & Loft Conversion

The modern way of living demands space. Extending your home to gain space can be key to achieve this goal.

This new found space, to your house, can create light and airy rooms for entertaining allowing you to begin to live, the way you want to live.

 Create your dream bedroom, with ensuite, to become a sanctuary from the world, through the conversion of that neglected loft space.

Extend or convert to get that perfect sleeping or party room, with a garden outlook ,and enjoy those lazy summer evenings. 

The space is there, let us help you find it!


Interior Design & Alteration

Whether you're looking to spruce up your current home, rental apartment or office space we will create a solution for you!

We bring experience and expertise to the table... and the walls and the chairs! Our team have travelled the world, and take influence, inspiration and research from all around them, to help create well designed spaces,to fit your brief.

So if you are looking to refresh a tired and rundown property, realise the investment potential of your whole portfolio or just change and refresh a few rooms for the better, we are here to make it happen. 


Conservation & Renovation

Experience our design; when it comes to conservation & renovation, the critical path revolves around some key elements:

Designers with a sympathetic eye for detail, a respect for context and meticulous research.

This is what we bring to every project regardless of the period of the property.

Modernisation of spaces, for us, is not about the wow of the now: but is about timelessness. Good design will not date or be dictated by the current fashions. So we work with consultants, who are experts in their field, and the highest quality craftspersons to develop sensitive and bespoke solutions.

This ensures your spaces of yesterday still have a function for today and all of your tomorrows. 

BUILD's Most Dynamic London Renovation 2016


An award winning renovation, extension and loft conversion to a detached suburban house in Sidcup, London.

The project involved the updating of a 3 bedroom house that was not fit for the client's purpose into a 4 bedroom family home, with an ensuite loft conversion, home office, cinema room, snug and luxurious open plan kitchen, living, dining area. The design redefined what space meant for the family creating secluded pockets for privacy, study and sanctuary. We improved our clients quality of life with large bright open places to entertain, eat and live as a family, with new views framed onto the garden amenity.

The architecture aimed to marry modern elements to the existing seamlessly. A two-storey side extension created a new bedroom and garage store. The rear extension allowed for a grand family area, flooded with light from a wall of bi-fold doors and a large skylight over. This freed up the original living and dining rooms to become a cinema room and crittall doors that lead to a snug with access to an open plan, kitchen, living, dining space. The loft conversion allowed for an ensuite bedroom. The overall effect is the perfect solution for modern living in a suburban setting.


An interior gem in London's jewellery quarter.


An investment opportunity for a client at the centre of the UK diamond trade and world famous jewellery quarter that is Hatton Garden. 

The renovation of a dated 2 storey, multiple occupancy, bachelor flat into a high-end residence with bespoke joinery and exquisite detailing befitting of a luxury cruise liner or a jewellery box. 

The design created a stylish open plan living dining area with bedrooms over 2 floors, one with ensuite. This has allowed the client to have a property accessible to the sales, rental and short stay markets. Hotel quality, with a home from home feel. 


Timeless new modern home; within a Grade II Listed apartment block


interior design and renovation project to an apartment within a Grade II listed property, in the much sort after and affluent Royal Borough of Kensington and Chelsea. 

The project involved close collaboration and negotiations with the other tenant of the building and the local authority to deliver desirable and high-end luxury living, whilst respecting the importance of the building as a whole.

The design created 2 bedrooms, one with an en-suite bathroom, and an open kitchen/living area which compliments the beautiful and dramatic stucco ceiling. From the detailed design of the wainscot panels and fire place, to the restraint of tempered clean lines, the composition and care were the hallmarks for the success of this project.