Estimate the works for a co-ownership or a whole building

From the building's collective DPE: the cost of the works per item, the total and the share of an average dwelling, the building's grants and the majority required at the general meeting.

Managing agents and owners’ councilsSingle ownersAnnual licence per building

Coming soon

The whole-building estimating tool is being finalised. The form below shows what you will be able to enter: it is not active yet, nothing is sent and no estimate is produced.

For your own home only, you can already use the renovation works simulator.

Your building

Collective DPE number (13 characters)

It appears at the top of the first page of the building's DPE. (DPE)

Building's postcode

Number of dwellings

The DPE may state a default entry: you will be asked to confirm it.

Who owns this building?

Free preview, without amounts

Once entered, the preview will state what the tool can estimate for your building, without any amount. The full estimate is reserved for licence holders.

Building size: not available
Heating and hot water (shared or individual): not available
Energy rating of the collective DPE: not available
Number of works that can be priced: not available
Possible grants: not available

Refused before any payment

Building owned by a social landlord: "This building appears to belong to a social landlord; this tool does not cover it", with a link to report an error.
Overseas building: "DPEs in the French overseas territories follow a different method; this tool does not cover them", with a link to France Rénov'. Detection uses the postcode entered.

How it will work

Enter the collective DPE
The number of the whole building's DPE, not that of a single dwelling.
Complete the building details
Ownership status, number of dwellings, number of storeys, shared or individual heating: as few questions as possible, prefilled when the DPE provides them. No cost is displayed until this information is confirmed.
View the free preview
What the tool can estimate for your building and the possible grants, without amounts.
Get the full estimate
With a licence: costs per item, fees and ancillary costs, building-level grants, general meeting majorities, estimated rating after works, PDF export to attach to the meeting notice.

What the tool will estimate

The estimate is made at building level, per physical unit (m² of façade, roof or ground floor, kW, window, dwelling), with the price ranges of its sources.

External wall insulation, flat-roof or loft insulation, lower floor insulation; grouped window replacement.
Shared heating (boiler, heat pump, district heating connection), ventilation, shared hot water.
Fees and ancillary costs on separate, editable lines: project management, managing agent fees, latent-defects insurance, health and safety coordination, technical inspection, contingencies.
Building total, amount per average dwelling and, if you enter your shares (tantièmes), the share of one unit.
Building-level grants with their caps: MaPrimeRénov' Copropriété, CEE, co-ownership eco-loan, VAT per item; local grants for information, outside the total.
General meeting majority required for each item of work, and estimated energy rating after works.

An item with no reliable price source is not priced: it is shown as "quote required". Areas estimated for lack of data are flagged and editable.

Who it is for

Professional and volunteer managing agents

Prepare the general meeting with an order of magnitude per item and per dwelling.

Owners’ councils and co-owners’ associations

Compare packages of works and check the grants before requesting quotes.

Single owners of a building

Individuals, joint owners, property companies (SCI) and private real-estate firms. The co-ownership blocks (general meeting vote, shares) are hidden.

Not covered: buildings owned by social landlords and buildings in the French overseas territories. A single co-owner can estimate the works for their own home with the renovation works simulator, and suggest that their managing agent estimate the whole building.

What the tool does not replace

The collective DPE, the energy audit, the draft multi-year works plan and the global technical assessment: only qualified professionals can issue them.
Project management, which designs and supervises the works; it is mandatory for MaPrimeRénov' Copropriété above €100,000 of works.
Owner's assistance (AMO), mandatory for MaPrimeRénov' Copropriété.
Contractors’ quotes and the competitive tendering decided by the general meeting.

Acronyms: DPE · AG · AMO · PPPT · MPR · CEE · RGE

Indicative estimate based on public ADEME data and simplified calculations. It is neither a collective DPE, nor an energy audit, nor a binding multi-year works plan. Only a certified assessor ("mention") or a qualified provider (decree no. 2022-663 of 25 April 2022) can issue the regulatory documents.

Example on a fictitious co-ownership

FICTITIOUS co-ownership, for illustration only: these are not your building’s figures. Amounts are orders of magnitude excluding VAT, obtained by multiplying assumed quantities by the unit price ranges of the tool’s reference data.

Assumptions: 30 dwellings of 75 m² on average, 5 storeys (ground + 4), 1,000 m² of façade to insulate, 450 m² of flat roof.

Item	Quantity	Unit price excl. VAT (low / median / high)	Total excl. VAT (low / median / high)
External wall insulation (polystyrene under render)	1,000 m² of façade	€115 / €155 / €220 per m²	€115,000 / €155,000 / €220,000
Flat roof: new waterproofing and insulation	450 m²	€130 / €180 / €240 per m²	€58,500 / €81,000 / €108,000
Shared demand-controlled mechanical ventilation	30 dwellings	€700 / €1,100 / €1,800 per dwelling	€21,000 / €33,000 / €54,000
Works, building total			€194,500 / €269,000 / €382,000 excl. VAT
That is, per dwelling on average			about €6,500 / €9,000 / €12,700 excl. VAT

Fees and ancillary costs come on top, about 20% of the works at the tool’s default rates: project management 9%, managing agent fees 2.5%, latent-defects insurance 2.5%, health and safety coordination 0.6%, technical inspection 0.3%, contingencies 5%. Each rate is editable.

The example prices no grant: grants depend on the energy gain computed from the building's actual DPE, on its status and on its co-owners.

Price origin: 2025-2026 market surveys gathered for the tool’s reference data (wall insulation: CoachCopro factsheet and ten published market sources; flat roof: CoachCopro factsheet; ventilation: ADEME, CoachCopro, Cerema); fee rates: Union sociale pour l’habitat “Repères” factsheets (no. 106, 2022) and ARC Nouvelle-Aquitaine fee grid (2023).

Licence prices

An annual licence covers one co-ownership or one building, identified by its collective DPE or by the DPE that replaces it. Its price depends on the confirmed number of dwellings.

Building size	Price per year
Up to 20 dwellings	€100 excl. VAT (€120 incl. VAT)
21 to 50 dwellings	€130 excl. VAT (€156 incl. VAT)
51 to 100 dwellings	€160 excl. VAT (€192 incl. VAT)
More than 100 dwellings	€200 excl. VAT (€240 incl. VAT)

Unlimited recalculations for one year, PDF exports and saved estimates.
Updates of cost and grant scales during the year.
The managing agent and up to 5 owners’ council members; 2 accounts for a single owner.
Managing agent with several co-ownerships: one licence per co-ownership, 20% off from 5 licences and 30% off from 20.

Tacit renewal every year, with a written reminder one to three months before the renewal date (article L.215-1 of the French Consumer Code); free online cancellation at any time, effective at the next renewal date (article L.215-1-1). An individual who subscribes (single owner, volunteer managing agent or owners’ council member) has a 14-day withdrawal period (article L.221-18).

Frequently asked questions about works in a co-ownership

What general meeting majority is needed to vote energy renovation works?

Energy-saving works are voted by an absolute majority of the votes of all co-owners (Law no. 65-557 of 10 July 1965, article 25 f). If that majority is not reached but the proposal has gathered at least one third of the votes, a second vote takes place immediately by a majority of the votes cast by co-owners present, represented or voting by post (article 25-1). Below one third, a new meeting held within three months can decide on an identical proposal by that same majority.

Is a collective DPE mandatory for our building?

Yes, for any multi-dwelling residential building whose building permit was filed before 1 January 2013 (Construction and Housing Code, article L.126-31). The general rule has applied since 1 January 2024, single-owner buildings included; co-ownerships of 50 to 200 units (homes, offices or shops) had until 1 January 2025, those of 50 units or fewer until 1 January 2026 (Law no. 2021-1104, article 158, VI). It is renewed every ten years, unless an A, B or C rating was established after 1 July 2021.

What is the difference between the collective DPE and my home’s DPE?

The collective DPE covers the whole building: it is the one used to estimate works decided by the co-ownership, such as façade insulation or shared heating. A home's DPE covers a single unit; it is required when that unit is sold or let. For works on your own home only, use OneDpe's renovation works simulator with your unit's DPE.

What are the draft multi-year works plan and the works fund?

The draft multi-year works plan (PPPT) lists the works to plan over ten years; it has been mandatory since 1 January 2023 for co-ownerships of more than 200 units, 2024 for 51 to 200 units and 2025 for 50 units or fewer (Law no. 2021-1104, article 171). The works fund receives each year at least 5% of the provisional budget and, once the plan is adopted, at least 2.5% of the amount of the works it provides for (Law no. 65-557, article 14-2-1).

What are the conditions of MaPrimeRénov' Copropriété?

The grant is paid to the co-owners' association for works that cut energy use by at least 35%: 30% of the works amount excluding VAT, or 45% for a gain of at least 50%, on a works amount capped at €25,000 excl. VAT per dwelling, with bonuses (leaving the energy-sieve classes, fragile co-ownership). The building must have been completed at least 15 years earlier, the co-ownership registered with at least 75% main residences (65% up to 20 units); a prior energy assessment, RGE-certified contractors and owner's assistance (AMO) are required. Total grants are capped at 80% of the operation's cost including VAT.

How do CEE and the co-ownership zero-rate eco-loan work?

Energy savings certificates (CEE) lead to a bonus paid by an energy supplier, to be negotiated before signing quotes; the whole-building renovation sheet (BAR-TH-177) requires a gain of at least 35%. In a fragile co-ownership supported by Anah, the CEE are claimed by Anah and not paid to the association. The co-ownership zero-rate eco-loan is a collective loan to the association, up to €50,000 per dwelling for a high-performance renovation.

What does the estimating tool not replace?

Neither the collective DPE, nor the energy audit, nor the draft multi-year works plan, which only qualified professionals can issue. Nor project management, mandatory for MaPrimeRénov' Copropriété above €100,000 of works, nor owner's assistance. Nor quotes: the general meeting sets the amount above which competitive tendering is mandatory, and tendering means requesting several quotes (Law no. 65-557, article 21; decree no. 67-223, article 19-2).

Can the single owner of a building use the tool?

Yes: an individual, joint owners, a property company (SCI) or a private real-estate firm. The co-ownership blocks (general meeting vote, shares) are then hidden. MaPrimeRénov' Copropriété is reserved for co-owners' associations; CEE and the reduced VAT rate remain possible, and an individual landlord may, under conditions, claim MaPrimeRénov' for up to 3 dwellings. Buildings owned by social landlords and buildings in the overseas territories are not covered.

République française — France Rénov'. Avant de vous engager, le service public vous informe gratuitement pour préparer et sécuriser votre projet : france-renov.gouv.fr

Sources: ADEME · Anah · Légifrance · ANIL

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