UID architects: pit house in okayama, japan
UID architects: pit house in okayama, japan UID architects: pit house in okayama, japan
nov 05, 2012
UID architects: pit house in okayama, japan

‘pit house’ by UID architects, okayama, japan
image © koji fujii/nacása & partners inc.
all images courtesy of UID architects




japanese practice UID architects has recently sent us images of the ‘pit house’ in the okayama prefecture for a single family of three. in re-interpreting the usual housing typology, the dwelling embraces its site with the main living functions in a space that extends the exterior into the interior, dug into the ground in a sort of ‘pit.’ the private areas are lifted off the ground in a solid box clad in cedar planks and covered in structural plywood panels on the inside with cherry floorboards. slender metal columns anchored in individual pylons spring from the bed of course gravel covering the immediate site to support the elevated mass.


an inset glass wall wraps the interstitial space between land and building to let in natural light into the main volume of the residence and create a visual continuity to the outside. the primary structure consists of concentric concrete inhabitable cylinders in a sunken circular footprint. many separate levels contain small gardens and several programmatic elements.

wood-clad upstairs houses the private functions
image © koji fujii/nacása & partners inc.

stairs located between the concrete core and the wooden outer ring
image © koji fujii/nacása & partners inc.

social areas in circular spaces
image © koji fujii/nacása & partners inc.

a glass wall wraps the living areasletting in natural light
image © koji fujii/nacása & partners inc.

image © koji fujii/nacása & partners inc.

image © koji fujii/nacása & partners inc.

exterior staircase in a circular landscape
image © koji fujii/nacása & partners inc.

gravel bed from the outside reaches the interior
image © koji fujii/nacása & partners inc.

wood-clad facade looking over the neighboring houses
image © koji fujii/nacása & partners inc.

street-side facade
image © koji fujii/nacása & partners inc.

floor plan / level 0
1. carport
2. terrace
3. entry
4. kitchen
5. dining room
6. living room
7. bathroom

floor plan / level 1
8. children’s room
9. bedroom
10. storage



construction detail of metal columns





project info:


consultants: konishi
structural engineers: yasutaka konishi, takeshi kaneko
structural: toshiya ogino
environment design office: toshiya ogino
general contractor: nakamura construction co.ltd. – hiromi nakamura, yasunobu hida, keizou yoshioka, kazuhiko kiminami
structural system: steel structure
used materials: exterior; ceder plate, wood protection paint
interior: structural plywood, exposed concrete, wood protection paint, cherry flooring
site area: 232.12 sqm
built area: 115.32 sqm
total floor area: 116.66 sqm
date of completion: october, 2011

comments policy
login with designboom
designboom's comment policy guidelines
generally speaking, if we publish something, it's because we're genuinely interested in the subject. we hope you'll share this interest and if you know even more about it, please share! our goal in the discussion threads is to have good conversation and we prefer constructive opinions. we and our readers have fun with entertaining ones. designboom welcomes alerts about typos, incorrect names, and the like.
the correction is at the discretion of the post editor and may not happen immediately.

what if you disagree with what we or another commenter has to say?
let's hear it! but please understand that offensive, inappropriate, or just plain annoying comments may be deleted or shortened.

- please do not make racist, sexist, anti-semitic, homophobic or otherwise offensive comments.
- please don't personally insult the writers or your fellow commenters.
- please avoid using offensive words, replacing a few letters with asterisks is not a valid workaround.
- please don't include your website or e-mail address in your comments for the purpose of self-promotion.
- please respect jury verdicts and do not discuss offensively on the competition results
(there is only one fist prize, and designboom usually asks renown professionals to help us to promote talent.
in addition to the awarded designs, we do feel that almost all deserve our attention, that is why we publish
the best 100-200 entries too.)

a link is allowed in comments as long as they add value in the form of information, images, humor, etc. (links to the front page of your personal blog or website are not okay). unwelcome links (to commercial products or services of others, offensive material etc. ) will be redacted. and, ... yes, spam gets banned. no, we do not post fake comments.

UID architects (4 articles)