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Bogafjell 1

Published by: Per Anda / NAL Last updated 05.06.2014

Row houses and single family houses with low energy use. Wood has been selected as main construction material in this project.

Short facts

  • Architect: Ramp AS | YouMeHeShe (UK)
  • Project duration: 2006 - 2009
  • Area: Gross area: 3 570 m2. (Each unit: 140 m2 heated area)
  • Environmental goal: Energy label: B

Project description

The area benefits from great views and close proximity to walking and hiking routes. The terrain is steep and represents a challenge in terms of accessible design.

The houses which are most suitably placed in terms of terrain, demonstrate inclusive design through step free entrances and whole life standard design. The houses are efficient with rational and spacious plans, and emphasis has been placed upon local suppliers and locally sourced materials.

Project as described was altered due to the situation in the market in late 2008. All houses were built to meet original low-energy goals, but developer did not succeed to meet the Norwegian Wood criterias for sustainable material use. Only a few houses fulfill all Norwegian Wood criterias.

Energy efficiency
Energy target: class B
Simple and compact building form.
Relatively well insulated building mass
Balanced ventilation with high efficiency rotating heat exchanger.
Energy supply (heat) based upon heat pump (air to water)

Timber technology
Timber studwork primary construction (pre-cut) for reduced cold-bridging. Timber I-beam floor decks and roof.

Environmentally friendly materials
Focus on local materials and short transport distances from place of production and processing. 100% heartwood cladding (locally produced).
Recycled textile insulation (if available).
Environmentally certified kitchen fittings (Ecolabel). Eleven products with environmental documentation approved by Norwegian Wood.

Universal design
Step-free access. Flat areas within each site.  
10 of 24 houses have whole life standard (main functions such as bathroom, kitchen, lounge and living room can be consolidated on ground floor).


Total cost NOK. 57 700 896  incl. VAT (NOK. 46 160 717 excl. VAT) 16 163 pr sqm. Total extra cost for low-energy concept calculated to NOK 2 641 628 or 5,7% of total cost.

The building project received a support from Enova of NOK 101100. Enova SF is owned by the Ministry of Petroleum and Energy (MPE). It was established to take a leading role in promoting environmentally friendly restructuring of energy consumption and energy generation in Norway


Area: Gross area: 3 570 m2. (Each unit: 140 m2 heated area)
Gross area: 3570 m²


Energy label: B
Energy consumption: 124 kWh/m2/år (net energy). 95 kWh/m2/år (delivered energy)
Energy sources: Heating based on heat pump (air-water)
Estimated net energy: 124 kWh/m²/year (NS3031)
Estimated energy delivered: 95 kWh/m²/year (NS3031)



Room heating: 43 kWh/m²/year
Domestic hot water: 30 kWh/m²/year
Fans: 8 kWh/m²/year
Lighting: 17 kWh/m²/year
Technical equipment: 23 kWh/m²/year


U-value roof: 0,12 (W/m²K)
U-value floor: 0,13 (W/m²K)
U-value wall: 0,18 (W/m²K)
U-value windows/doors: 0,12 (W/m²K)


Building costs: Total cost 46,2 mill NOK (excluding VAT)
Extra expenses energy: 740 kr/m²
Project support Enova: 101100 kr


Street address: Klåvsteinane 2-14, 4324 Sandnes
Place: Bogafjell
Municipality: Sandnes
Project duration: 2006 - 2009
Status: Completed
Project type: New building / addition
Building type (function): Housing area / housing development , Detached home / townhouse
Case study project program: Norwegian Wood


Developer / client: Klepphus AS
Architect: Ramp AS | YouMeHeShe (UK)
Project management: Klepphus AS
Energy consultants: Rambøll AS
Consultants: Dimensjon Rådgivning AS (RIB) | Systemair AS (RIV) | Klepp Rør AS, Sønnico AS
Main contractor: Klepphus AS
Drawings may contain errors and may not be in accordance with local law or building code. Drawings are copyrighted and for inspiration purposes only. National Association of Norwegian Architects is not responsible for any damage og loss caused by the any type of use of drawings available online.


Norwegian Wood - et laboratorium. Miljøvennlig trearkitektur for fremtiden (2008).


Norwegian Wood - et laboratorium. Miljøvennlig trearkitektur for fremtiden (2008).