Mara Quell, architecture and structure

© 2026

Mara Quell is an architect and engineer who builds with as little material as a structure allows: concrete shells a few centimetres thin, timber roofs that hold themselves up by their shape, and walls of earth taken from the site. The buildings are for everyday use, and they are beautiful because they are efficient, not in spite of it.

Every project starts with the structure. Find the shape that carries the load, and the rooms, the light and the budget usually follow. The studio designs and calculates every building it draws.

Underside of a thin concrete canopy with narrow skylights
Photo: Quell studio
A corridor between rammed earth walls lit from above
Photo: Quell studio
Mara Quell in the workshop
Photo: Quell studio

Work

Eight buildings from fifteen years of practice, each with its year and the structure that carries it.

2009

A long concrete barrel vault on the salt flats

Salt StoreBarrel vault, 4 cm shell

2011

A rammed earth house on a dry ridge

House on the RidgeRammed earth, three rooms

2013

Inside a market hall under a folded concrete roof

Covered MarketFolded concrete roof, 42 m span

2015

A timber gridshell chapel among pine trees

Chapel in the PinesTimber gridshell

2017

Concrete umbrella canopies over a bus station at dusk

Bus StationSix hypar umbrellas

2019

A slender ribbed concrete water tower

Water TowerRibbed shaft, 38 m

2021

A school gymnasium under a timber lattice roof

School GymnasiumTimber lattice roof

2024

A cantilevered concrete shell roof over a ferry pier

Ferry TerminalCantilevered shell, 18 m

→ Since 2009Porto, Portugal[Practice]

The studio is small on purpose: four architects and engineers who draw, calculate and visit the site themselves, so the idea of a building survives all the way to the last bolt.

The studio: drawing tables and shell models
Photo: Quell studio

Mara Quell trained as a civil engineer before she studied architecture. She teaches structures two days a week and writes about thin shells and low-carbon building. The studio has built in Portugal, Spain and Morocco.

Where the structure is the architecture

“A roof that is thin because its shape carries it is cheaper, lighter and quieter than one that is thick because nobody asked the shape. We do not add beauty at the end. We find it in the calculation, or we do not find it.”

[Mara Quell, Notes on Thin Shells, 2022]

[Start a project]

Tell us what you want to build and where. We reply within three working days, and the first conversation is free.

studio@example.com
+351 220 000 000

What are you building?

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Most clients come with a site, a budget and a doubt about whether something unusual can be built for it. Usually it can.

We work across Portugal and Spain, and further away when a project needs a structural idea more than a local office. Fees are fixed per stage and agreed before we start drawing.

Plaster models of thin shells on a table
Photo: Quell studio
The Covered Market from the square
Covered Market, 2013. Photo: Quell studio