The circular house

  • Building Type : Isolated or semi-detached house
  • Construction Year : 1976
  • Delivery year : 2022
  • Address 1 - street : 586 Route de Jarnioux 69640 PORTE DES PIERRES DORéES, France
  • Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.

  • Net Floor Area : 200 m2
  • Construction/refurbishment cost : 165 000 €
  • Cost/m2 : 825 €/m2
  • Primary energy need :
    52 kWhep/
    (Calculation method : RT 2012 )
Energy consumption
Economical buildingBuilding
< 50A
51 à 90B
91 à 150C
151 à 230D
231 à 330E
331 à 450F
> 450G
Energy-intensive building

A 2-storey house built in 1976 for a family of winegrowers with a use :

  • Ground floor: garage, cellar, boiler room, room for grape pickers
  • 1st floor: living apartment with 3 bedrooms


As buyers, we decided to renovate the building by offering a better energetic performance and by using a maximum of reused materials.

In order to be efficient, we divided the roles between us:

  • 1 person was in charge of the energetic renovation + CEE and Maprimerenov help
  • 1 person was in charge of finding the materials from the reuse

Building users opinion

It is difficult to express an opinion because the renovation work is not finished and the house is not yet occupied.

If you had to do it again?

We would add solar panels on the roof.

Photo credit

Naomi Scherer


    Naomi Scherer


Construction Manager

    Julie Teulé

    06 73 43 35 01

Energy consumption

  • 52,00 kWhep/
  • RT 2012

    We do not have more information.

    This is a global renovation project aiming at a BBC renovation level. The initial thermal audit allowed us to define two work scenarios, one allowing a minimum reduction of 30% in energy consumption, the other allowing a reduction of about 400 kWh/m²/year. We opted for the more efficient scenario so that the house could significantly reduce its carbon impact.

    We also chose to switch to renewable energy for heating and domestic hot water, by installing a wood pellet boiler in place of the old original oil boiler.

  • 475,00 kWhep/

Real final energy consumption

    87,68 kWhef/

Envelope performance

    We have not yet had time to do a control audit, nor to have a year of consumption to evaluate the real consumption of the building. Also, we have not yet done the air tightness test that is planned in the coming weeks.

    Regarding the envelope, the concrete walls have been insulated with 20 cm of cellulose wadding, the attic has been insulated with 40 cm of cellulose wadding and the bottom floor with 6 cm of polyurethane foam. All the windows were replaced by PVC double glazing.


    • Water radiator
    • Low temperature floor heating
    • Wood boiler
    • Wood boiler
    • No cooling system
    • Humidity sensitive Air Handling Unit (Hygro B
    • Biomass boiler
  • 60,00 %
  • Bay window opening to the south.

GHG emissions

  • 1,00 KgCO2/m2/an
  • Heating, cooling and DHW

  • 46,00 an(s)


    • Sécheresse géotechnique (Retrait-Gonflement sols argileux)

    No action at this time.

Construction and exploitation costs

  • 36 000,00
  • 1 500
  • 150 000
  • 22 500

Energy bill

  • 1 250,00

Urban environment

The house is located on an agricultural land (therefore not buildable) between the villages of Pouilly-Le-Monial and Jarnioux, in the Commune of Porte des Pierres Dorées.

To the east, a wood (abandoned) of 10.000m2 runs along the width of the land.
To the north, an uncultivated meadow of 8.000m2 runs along the land.
To the south, the departmental road that connects the 2 villages passes by.
To the west, there is a hamlet with about ten individual houses with private gardens.

Bus stop in front of the house. 

Primary school at 800m.
The shops are reachable by car, except for a supermarket, bakery and hairdresser at 600m in the center of Pouilly le Monial.

Land plot area

2 752,00 m2

Built-up area

3,60 %

Green space

2 652,00

Parking spaces

Several cars (4 or 5) can park outside. 2 cars can park in the outbuilding. Several bicycles can be parked inside the outbuilding or outside.

Building Environmental Quality

  • works (including waste management)
  • consultation - cooperation
  • energy efficiency
  • renewable energies
  • building process
  • products and materials

Reuse : same function or different function

    • Indoor joineries
    • Outdoor joineries
    • Floorings
    • Isulation
    • Heating ventilation air conditioning
    • Plumbing
    • Landscaping

    Outdoor design

    • Wood for terrace 50m2
    • Stone for low wall 2m3


    Plumbing :

    • Faucets (11 taps for: 1 kitchen, 2 showers, 3 sinks, 1 laundry, 1 bathtub, 2 hand washers)
    • 1 Bathtub
    • 1 laundry sink
    • 1 Kitchen sink
    • 5 Cast iron radiators


    Floor covering :

    • Earthenware Bathrooms: 15m2 in total
    • Floating parquet : 70m2 (all the parquet)
    • Tile floor SDB: 25m2 (the totality of the grounds of the SDB and WC+Cagibi)


    Interior carpentry :

    • Interior doors: 16 doors and closet doors (all)
    • Garage doors: 1 door

    Exterior Carpentry :

    • Windows: 2 windows
    • Shutters: 1 pair of shutters


    Insulation :

    • Interior insulation in Cellulose Wadding: 243m2
    • Placo : 270m2


    Other :

    • Wall and ceiling paint : 9 pots of 15l
    • Kitchen : 13 boxes + 13 cupboards

    Outdoor design

    1. Terrace wood : from a student housing in Nantes, reused for the same purpose
    2. Stone for low walls: from local individuals



    1. All faucets (Nobili brand) are former "show-room" products that could no longer be sold on the market
    2. Bathtub: from a construction site for an Accord hotel in Nantes. They decided at the end to replace the bathtubs by showers, they were resold via a platform specialized in the reuse of building materials (Articonnex)
    3. Laundry sink: ceramic sink from the old kitchen that will be relocated in the laundry room
    4. Kitchen sink: sink recovered from a private individual
    5. 5 Cast iron radiators that were already in the house. We dismantled, cleaned, repainted and re-installed them 


    Floor covering :

    1. Bathroom tiles: one part from the end of the building sites, the other from the remaining batches of end of collections that could not be sold normally; some tiles were purchased from Mineka, a platform specialized in reuse
    2. Parquet: end of collection German manufacturer intended for the skip, bought via a platform specialized in reuse of building materials (Articonnex)
    3. Floor tiles SDB: recovered from a private individual and a physical platform specialized in the reuse of building materials (Mineka)


    Interior carpentry :

    1. Interior doors: we recycled all the doors of the house regardless of their condition. 
    2. The garage doors become sliding doors to access the laundry room


    Exterior Woodwork :

    1. The old windows were transformed into a small greenhouse for the garden
    2. Shutters: 1 pair of shutters on a new opening that was created. bought from a private individual on


    Insulation :

    1. Interior insulation in cellulose wadding
    2. Recycled and recyclable placo certified "Cradle to Cradle


    Other :

    1. Paint: 95% recycled paint from the Circouleur brand to paint 320m2 of Walls and Ceilings
    2. Kitchen : second hand kitchen + appliances bought from a private individual and recomposed according to the surface of our kitchen

Sustainable design

    Parquet : The German brand Meister produces tons of parquet every year. The end of collections can no longer be sold to distributors, because the remaining surface is too small. Articonnex resells it via its platform to avoid incentivization. It is a process that works very well.

    Deck wood : Also bought from Articonnex, the wood needs to be cleaned before installation, I'm glad to have been able to recover it, but the cleaning work (50m2 of wood boards) will be long.

    Tile : This was the most difficult lot to find. We wanted a product from the reuse and at the same time aesthetic.
    We spent hours on different sites to find the rare pearl in the necessary quantities. I managed to find on the boncoin a tiler who sold his end of building sites in the region and a website that sold lots of end of collection.


    Carrelage, Baignoire et Robinet de réemploi

    Carrelage issu des fin de chantier et fin de collections

    Economy of the functionality: to carry out work ourselves, we made according to 2 modalities:

    1. Participation in home sales to buy second hand tools
    2. Asking our entourage to lend us some tools


    Recyclability : the acrylic paint is a recycled paint of the brand Circouleur in the whole house.
    The cellulose wadding, used in the insulation of walls and attics, is a material resulting from the recycling of papers and fabrics.

    The insulation was made of cellulose wadding.

Environmental assessment

    Categories Avoided CO2 (kg)  Avoided water consumption (m3) Avoided waste (kg)
    Outdoor facilities 62,5 0,532 141,4834825
    Exterior fittings / Locksmithing - Metalwork 0 0 0
    Carpentry 0 0 0
    Partitions 0 0 0
    Coverage 0 0 0
    Roofing / Exterior fittings 0 0 0
    Lighting 0 0 0
    Safety lights 0 0 0
    Climatic engineering equipment 0 0 0
    Electrical equipment 0 0 0
    Facades 0 0 0
    False ceilings 0 0 0
    False floors 0 0 0
    False ceilings 0 0 0
    Structural work 0 0 0
    Sanitary installations 180,44 1,73558 107,7069652
    Insulation -370,7487245 6,234491044 1262,966549
    Exterior carpentry 429,7347105 4,559417211 472,8862421
    Interior carpentry 1105,462707 14,09187852 656,8076209
    Furniture 1698,580923 1269,35 1297,859197
    Paint 267,8672393 7,140741353 253,6620728
    Plumbing 1861,94509 14,89794897 2304,821493
    Floor coverings 738,6422457 95,0629817 1034,940215
    Floor and wall coverings 18,195 0,0398 230,516326
    Wall coverings 229,1304052 50,79448902 490,347661
    Building security 0 0 0
    Locksmithing - metalwork 37,57576588 0,212741603 66,70446444
    VRD 0 0 0
      Avoided CO2 (kg)  Avoided water consumption (m3) Avoided waste (kg)
    TOTAL 6259,325362 1464,65207 8320,702289
      Km in a small car Nb of rectangular bathtubs nb of years of household waste of a French person
    Equivalent  50075 9764 17
    Equivalent trip from Paris to Nice 57,0    

    The results of the impact calculation do not include the reuse of the following furnishing materials :

    • Wooden door frames ;
    • All the furnishings of the house including: Sofas, armchairs, tables, beds, wardrobes, shelves, household appliances (oven, toaster, washing machine, hotplates, freezer, hood), summer garden furniture...
    • Decoration: dishes, vases, frames, mirrors, illumination (lamps, sconces..), all garden tools (lawnmower, drizzle, watering can, hose, shovel, rake, garden stone sink...).

    Our objective is not limited to the material of re-use of the second work, but also not to make recourse to the extration of raw material in the decorative aspet: we buy (or recuperate) only articles second hand, or in the case of the electric household appliances, reconditioned products.

Reproductibility and Innovation

    From the moment we bought the house, we wanted to use a maximum of reused or recycled products.

    For the renovation project, we chose an interior designer specialized in reuse. We wanted an architect who would be able to accompany us from a technical point of view of the renovation, but also to advise us and to push us to use a maximum of reused products.

    We therefore chose to work with the architect Julie Teulé, member of the CFAI and president of Minéka.

    We imposed a maximum of reuse in our project and Julie Teulé advised and helped us on the choice of materials, the implementation on the building site and, in certain cases, the research of materials (especially the tiling which was the most difficult lot).

    Most of the search for materials was done by ourselves via the website. The first purchase we made was the kitchen furniture in September 2021. The architect took the ribs of the cabinets and appliances to integrate them into our new kitchen.

    The major obstacles were finding the right materials within a 20 km radius.

    One of our objectives on the "reuse" lot was to show that it is possible to make an aesthetic project with second hand materials. We were therefore restricted in the choice of some materials.

    We created an instagram account "my circular house" to document the construction site and the circular economy. It's an ongoing project, but many people have asked us about our approach and ask for advice on how to access the deposits.

    Individuals do not yet have access to this type of information, only "do-it-yourselfers" do reuse when, in reality, anyone could do it. It is enough to know where to find the materials.

    Concerning the storage: in our property there is a big outbuilding of 90 m² on the ground. We were able to store the materials there for the duration of the work.

    There was no demolition.

    All materials were stored in the shed located on the property, just behind the main house.

    All materials were stored in the hangar (90 m² floor area) located on the property, just behind the main house.

Economic assessment

  • 2 000
  • 60 %
  • 25 000

Social economy

    The paint used to paint the walls, Circouleur, is an SSE structure because it works with people in professional reintegration for the sorting of paints to be recycled, and with an Esat with disabled people for the labeling of the paint pots.

Reasons for participating in the competition(s)

Working in the circular economy in the building sector on the one hand, and in the energy precariousness on the other, it seemed obvious to us, when we had to start the reflection on the renovation of the house, to improve as much as possible the energetic performance of the house with ecological materials and by making a maximum of re-use of materials to reduce the extraction of the raw material.

Our objectives for the renovation were :

  • To improve the initial energetic performance
  • To make a maximum of reuse in the construction and interior design, keeping as much as possible the materials already existing in the house (doors, radiators, floors ...)

Building candidate in the category

Bâtiments résidentiels / prix de la rénovation

Bâtiments résidentiels / prix de la rénovation

Trophées Bâtiments Circulaires 2022

 Circular Buildings 2022 Awards
 circular economy
 materials and solutions

Author of the page

  • Other case studies



    Trophées Bâtiments Circulaires 2022