A white concrete staircase rising along a plain wall, with a single vase on the step

We design homes, workplaces and public rooms around daylight, honest materials and the way people live.

  • Architecture & Interiors
  • Copenhagen — since 2011
  • Scroll

Ostra Studio

(01) Studio

We design quiet, durable buildings and rooms for the people who live and work in them. Each project starts with light, proportion and honest materials, and ends in places made to grow better with age. Nothing added for effect, nothing left unresolved.

Curved leather tub sofa in a calm, softly lit living room
Tub sofa, Frederiksberg apartment, 2023
  • 14 years
  • 62 completed projects
  • 9 people
  • Kinfolk
  • Wallpaper*
  • Dezeen
  • Frama
  • &Tradition
  • Carl Hansen & Søn
  • Louisiana Museum
  • Noma

(02) Services

What we do

  1. New houses, pavilions and small public buildings, from first sketch to handover.

    Residential building with timber and plaster surfaces in soft daylight

  2. Plans, joinery and lighting for homes, studios and restaurants.

    Quiet interior with built-in joinery and natural materials

  3. Tables, shelving and lamps, made in small runs with Danish workshops.

    Solid wood furniture piece photographed against a plain wall

  4. Careful repair and new uses for listed houses and old industrial buildings.

    Restored historic interior with original walls and new fittings

(03) Selected work

Selected work, 2019—2025

Kiln House, a private residence by Ostra Studio in Hornbæk
01

Kiln House

Hornbæk 2024

Private residence

Hovland Pavilion, a cultural pavilion by Ostra Studio in Aarhus
02

Hovland Pavilion

Aarhus 2023

Cultural pavilion

Atelier Nørre, a workspace interior by Ostra Studio in Copenhagen
03

Atelier Nørre

Copenhagen 2023

Interior, workspace

Sølv Dining Room, a restaurant interior by Ostra Studio in Copenhagen
04

Sølv Dining Room

Copenhagen 2022

Restaurant interior

Spiral Archive, a library extension by Ostra Studio in Malmö
05

Spiral Archive

Malmö 2021

Library extension

(04) Process

How a project unfolds

Four stages, one team from first visit to handover. Most homes take fourteen to twenty months; we tell you early where the time goes.

  1. Listening

    We walk the site with you at different hours, then agree a written brief and an honest budget before a single line is drawn.

  2. Sketch

    Massing studies, light studies across the seasons and card models at 1:50, so you can see the rooms before you commit to them.

    Architectural interior shown as reference for the sketch stage

  3. Drawing

    Technical drawings down to the joinery, the permit application with the municipality, and tenders to craftsmen we have built with before.

  4. Building

    Weekly site meetings, decisions logged within a day, and supervision through to handover and the one-year inspection.

    Completed interior shown as reference for the building stage

(05) Clients

We asked for a hotel that felt like the dunes outside. Ostra kept the 1920s timber frame, added nine rooms, and finished two weeks before the Easter season.

Mette Lund Owner, Hotel Grenen Klit, Skagen

They redesigned our east galleries without closing the museum for a single day. Visitor numbers in the new rooms are up a third, and our conservators finally have proper daylight control.

Jonas Vestergaard Director, Aarhus Museum of Craft

Our house in Hornbæk is 112 square metres. Ostra moved the stairs, lowered one window by forty centimetres, and now we see the Sound from the kitchen table.

Anna and Peter Holm Private clients, Hornbæk

(06) Contact

Have a site, a room,
or just a hunch?

Start a project
Write
hello@ostra.studio
Call
+45 33 12 40 18
Visit
Ny Kongensgade 14
1472 København K

Tell us about the project. We reply within two working days.