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Plan & Section
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Architecture & interiors — Oslo

Buildings drawn slowly, built to last.

Plan & Section is a small studio for houses, rooms and quiet public buildings. Every project begins with a pencil, a long walk around the site and a section cut through the ground.

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Section A–ALyngholmen House1 : 100

01

We draw the section first — the line where a building meets the ground, the light and the people inside it. Everything else follows from getting that one drawing right.

42Buildings completed
14Years in practice
9National awards
1:50Our favourite scale

02

Selected work

An index of buildings, 2021–2025.

YearProjectType · PlaceMaterial · Area
  1. 2025Lyngholmen HousePrivate house · HvalerPine cladding · 212 m²A long low timber house with a boardwalk crossing a lawn
  2. 2024Field HousePrivate house · JærenLarch and zinc · 148 m²A weathered timber house standing in tall grass
  3. 2024Kvartal StairRenovation · OsloLime plaster · 96 m²A white plaster stair rising towards a landing with a vase
  4. 2023Stillrom ChapelCultural · TrondheimBoard-marked concrete · 180 m²Sunlight falling through a window into a board-marked concrete room
  5. 2022Berget VillaPrivate house · BergenConcrete and oak · 264 m²A timber and concrete house cantilevered over boulders among trees
  6. 2021Fort GalleryAdaptive reuse · KristiansandExisting bunker · 410 m²A weathered concrete bunker against a white sky
Lyngholmen House: a long, low timber house with a boardwalk crossing the lawnHvaler · Completed 2025

03

In focus — Lyngholmen House

A long timber house that steps down with the rock.

Thirty-eight metres of pine laid along the contour of a granite shelf. One long room faces the water; the bedrooms tuck into the slope behind it. The section drops half a storey where the rock does, so the roof reads as one quiet line from the shore.

Ground floor plan1 : 200
A timber ceiling opening to a skylight

04

Method

Four drawings before a single brick.

  1. 01

    Survey

    We measure the site by hand and on foot: contours, trees, the path of the sun in every season.

  2. 02

    Sketch

    Loose studies in pencil until the building has one clear idea it can be explained by.

  3. 03

    Section

    The cut through ground, rooms and roof that settles heights, light and structure together.

  4. 04

    Site

    We stay on through construction, drawing details at 1:5 for the people building them.

Street elevation · Tollbugata1 : 500

05

Studio

Six architects, one long table.

Ingrid Halvorsen

Founding partner

Trained in Oslo and Porto. Leads the houses and still draws every first section herself.

Mathis Brandt

Partner

Came from timber engineering. Looks after structure, detail and the long conversations with builders.

They drew our house until it was obvious. Then they drew it again, and it was better.

Clients, Lyngholmen House

Recognition

  1. 2025Houen Foundation AwardLyngholmen House
  2. 2024Timber Prize — ShortlistField House
  3. 2023Sacred Space AwardStillrom Chapel
  4. 2022Young Practice of the YearThe studio
  5. 2021Reuse Award — CommendedFort Gallery

06

New projects

Tell us about the site.

We take on a handful of new buildings each year. Send us a few lines about the place, the people and the budget — we answer every letter within a week.

Studio
Tollbugata 24, 0152 Oslo
Write
studio@planandsection.example
Call
+47 22 00 00 00
Site
59.9075° N, 10.7430° E
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Plan & Section

Tollbugata 24, 0152 OsloInstagramBack to top ↑Concept website · Fictional studio · Stock photography