New Construction

  • Building Type : Terraced Individual housing
  • Construction Year : 2022
  • Delivery year :
  • Address 1 - street : Radhus gründen 6880 TARM, Denmark
  • Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.

  • Net Floor Area : 2 779 m2
  • Construction/refurbishment cost : 5 100 000 €
  • Number of Dwelling : 31 Dwelling
  • Cost/m2 : 1835.19 €/m2

Certifications :

  • Primary energy need
    83 kWhpe/m2.year
    (Calculation method : Primary energy needs )

69% less CO2 footprint than the Danish building regulation requires 

These buildings is a climate-optimized passive house-plus project with 31 public housing units from 75 to 114 square meters. The homes replace a former town hall building on the site and are centrally located in Tarm by. Green outdoor areas create an oasis with rainwater beds and terraces between the houses. The building's CO2 footprint is 69% lower than the requirements of the Danish Building Regulations 2023. The climate-friendly homes are designed to be as energy efficient as possible.

Energy efficient dwelling in interaction with nature 

The homes' low energy consumption is achieved, among other things with:

  • An airtight construction, so that the houses have a very low heat loss from the walls, ceiling and floor.
  • Tight and south-facing windows, so that the sun's heat is utilized.
  • Controlled ventilation with heat recovery.
  • Solar heating system used for domestic hot water.

The building is compact and open to the south and green outdoor spaces.
LAR elements such as rainwater beds and wet basins with reduced drainage ensure against cloudbursts and give the green areas a blue theme.
The LAR areas are planted with grasses. The homes are built in wooden constructions with facades in the natural materials slate and thermo wood.
Solar cells and a district heating integrated micro heating system contribute to the plus energy standard.

Photo credit

Jonas Krebs


    R&S Boligforening

Construction Manager


Energy consumption

  • 83,00 kWhpe/m2.year
  • Primary energy needs

    PE demand (non-renewable Primary Energy 83 kWh /(m²a) on heating installation, domestic hot water, household electricity and auxiliary electricity calculated according to PHPP: 

    • Air tightness: n50 = 0.6/h
    • Annual heating demand: 13 kWh/(m²a)
    • Heating load: 12 W/m²
    • Cooling load: 0 W/m²

    Primary Energy Renewable (PER):

    • Demand: 40 kWh/(m²a)
    • Supply: 66 kWh/(m²a)

Envelope performance

    - External Wall
    Wooden profile 20 mm
    Air 25 mm
    Wind barrier 8 mm
    Wood with insulation 295 mm
    Installation layer 95 mm
    Gypsum 25 mm
    U-value: 0.095 W/m²K

    - Roof
    Plywood and roofing felt 15 mm
    Lath and air 50 mm
    Wood with insulation 400 mm
    Wood with insulation 70 mm
    Cement-wood ceiling 25 mm
    U-value: 0.084 W/m²K

    - Floor
    Insulation EPS with graphit 400 mm
    Concrete 120 mm
    Wooden/ Vinyl floor
    U-value: 0.076 W/m²K


    • Heat pump
    • Heat pump
    • No cooling system
    • Double flow heat exchanger
    • Solar photovoltaic

    The Mechanical systems is one compact unit that provides ventilation, heating & domestic hot water.

Urban environment

    Part of a renewing of the city center and Urban blue and green concept. A site for the former town hall was used to build social housing with integrated green and blue outdoor spaces. Blue spaces for rainwater biotop and climate robust solutions for future climate change.


    Ventillation Compact P Nilan


    Structural work / Passive system

    The Compact P is a ventilation and heating system that provides with ventilation, heat recovery and domestic hot water production. It ensures a daily renewal of the air by evacuating dust, odors and excess humidity for a healthy and pleasant indoor atmosphere. When it is hotter inside than outside the house, an integrated bypass lets fresh air in directly to cool down as much as possible without using additional energy.

Construction and exploitation costs

  • 510 000

Life Cycle Analysis

    LCA incl. PV and district heating - 3,8 kg/m2 per year.

Water management

    Rain water is running to a rain biotope. Grey water runs to a central cleaning plant.

Indoor Air quality

    Indoor air quality in the summer: all rooms have windows to outside and opens to living area.


    • Interior temperature winter 20°C
    • Interior temperature summer 25°C

Quality of life and services

The building open to green outdoor spaces.

GHG emissions

  • 3,70 KgCO2/m2/year
  • GHG emissions (GHG in use can be found in the PER sheet in the PHPP): 0 according to PER and CO2/kWh final DK2035

Reasons for participating in the competition(s)

  • The building's CO2 footprint is 69% lower than the requirements of the Building Regulations 2023;
  • The houses are climate-friendly and designed to be as energy efficient as possible;
  • Rainwater beds and wet basins with reduced drainage ensure against cloudbursts and give the green areas a blue theme;
  • The window surface temperature indicator shows comfort values on all major glacings. All U values better than comfort U values;

Building candidate in the category

Users’ Choice

Users’ Choice

Green Solutions Awards 2022-2023
 energy efficiency eco-design housing low energy building renewable energies Green Solutions Awards Green Solutions Awards 2022 2023 Passiv House Passivhaus

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Asta Justesen

Communication manager

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Green Solutions Awards 2022-2023