Spaces that hold
the way you live
We design architecture and interiors as one continuous idea — quiet, tactile, and built around how you actually live.
250+
Projects delivered since 2012
98%
Repeat & referred clients
Where structure becomes calm
Architecture
New builds, extensions and full renovations — from the first site study through planning to construction.
Interior design
The inside of the building treated as one piece with it — layout, light, joinery, materials and fixed furniture.
Styling
The last layer — loose furniture, textiles, art and objects, sourced and placed so the space is ready to live in.
Design made for daily life
No two lives look the same, so no two homes should. We design around your routines, your light, and the way you actually move through a space — then hold the palette to a short list of materials so the architecture can stay quiet.
Interiors shaped around you
46K
Square metres reworked
72%
Clients who return or refer
14 yrs
Practising since 2012
Engagements
Three ways to start
Bring us in for a single day of direction, a full design package, or the whole project end to end.
Consultation Day
from €1,200
A focused block of studio time — a walk-through, a second opinion, or direction to hand to your own team.
Design Package
from €14,000
A complete, buildable design package. You hold the builder relationship and the site.
Full Service
from €32,000
One contract from first sketch to the last cushion. Most of our residential work runs this way.
Let’s shape your space together
We take on a handful of new projects each year. Tell us what you’re planning.
Start a project
In the words of the people who live there
Working with Sienna was calm from start to finish. They translated a vague idea into a home that feels considered in every corner — and completely ours.
Sofia Marques
Private residence, Cascais
Sienna took the time to understand how we actually live. The result is a space that works quietly in the background and still surprises us daily.
James Carter
Apartment renovation, Porto