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Renovation support

Thermal insulation subsidy in Neuchâtel

In Neuchâtel, insulating the roof, façades and floors facing outside or against the ground is subsidised per insulated m², for buildings permitted before 2000. The application is entered on the Buildings Programme portal, then posted with a signature, before works begin. The general conditions in force are the 2026 edition, as of 1 September 2026 (in French only).

The amount depends on the insulated area, at least 50 m² per application. Support is capped at 50% of the investment; in 2026 and 2027 the IP14 bonus can be added.

Covered rates and scope

Building envelope

Thermal envelope insulation (M-01)

CHF 60 /m²

Building built before 2000

Open official source

Indicative official rate. The final amount depends on the application and cantonal decision.

Who can apply

  • Any owner: individuals, condominiums, companies or municipalities. Support is paid to the owner or the condominium.
  • A building whose final building permit was issued before 2000.
  • Elements facing outside or against the ground, around rooms initially heated to at least 18 °C.
  • All building types, whatever the heating; a single application per building (EGID) for all insulated elements.

What is not subsidised

  • Windows and doors: their area is deducted from the insulated façade.
  • New buildings, extensions and raised storeys.
  • An element that already meets the required U-value, or replacing insulation that was already subsidised.
  • Works already started when the application is filed.
  • Balconies, parapets, eaves, window reveals and blind boxes.

Technical conditions

  1. U-value of at most 0.20 W/m²K after works for roofs, walls and floors facing outside or less than 2 m below ground; 0.25 W/m²K beyond 2 m.
  2. Improvement of at least 0.07 W/m²K: the element must exceed 0.20 W/m²K before works.
  3. At least 50 m² insulated per application, which matches the minimum in the rate.
  4. A CECB Plus must accompany the application above 166 m² insulated; if it does not apply to the building, an energy analysis following the SFOE specifications.
  5. Building in an old-town zone, on the site plan or protected: consult the municipal planning office or the heritage office (OCPI) beforehand; relaxed U-values with evidence.
  6. Support capped at 50% of the investment (materials and labour); for self-build, at the cost of materials.

The application, step by step

  1. Choose your route before applying: per-element insulation cannot be combined with renovation by CECB classes or with Minergie, and the route cannot change during the project.
  2. Prepare the quotes, the U-value calculation for each element (survey photos or old plans for the existing build-up) and, above 166 m², the CECB Plus.
  3. Enter the project on the Buildings Programme portal (Neuchâtel), then post the generated form, signed, with its attachments: the application only counts once received.
  4. After the acknowledgement of receipt, works may start at your own risk if the project is authorised; the grant decision arrives by post.
  5. Report completion no later than 24 months after the decision; an extension is possible, as a rule for one year at most.
  6. Send the completion declaration, entered on the portal then posted; the cantonal energy service (SENE) checks it, sometimes on site, then pays the support.

Check the building by address

Check the building by address

The address identifies the canton and prepares an initial view of plausible support.

Submit the application and wait for the decision required by the programme before starting work or making a binding commitment.

Parcellis does not issue energy certificates and is not an accredited body.

Frequently asked questions

Is insulating over an unheated attic subsidised in Neuchâtel?

Under conditions: the roof above a cold attic and basement insulation can be accepted if there is only one unheated level between the insulated element and the heated rooms. Once two separate unheated levels sit under the roof, the roof is no longer subsidised.

Are new windows subsidised in Neuchâtel?

No: windows and doors are excluded, and their area is deducted from the insulated façade. Replacing them remains tax-deductible as an energy-saving measure, according to the cantonal tax notice.

Can I start works as soon as my application is entered online?

No: the application only counts once the signed form and its attachments have been received by post. Only then may works start at your own risk, if the project is authorised. Works already started when you apply are not subsidised.

Is there a bonus if I insulate the whole envelope?

Yes, the IP14 bonus, strengthened in 2026 and 2027: it is added if at least 90% of the façades and roof are insulated at the same time, or if the envelope reaches CECB class B or C after works. It needs a separate application, also before works, and total support remains capped at 50% of the investment.

My old building is protected: can I insulate it with support?

Yes, with relaxed U-values if evidence shows the requirements cannot be met. In an old-town zone or on the site plan, first consult the municipal planning office (Neuchâtel, La Chaux-de-Fonds, Le Locle) or the heritage office. For a heritage building with at least 3 dwellings in a partner municipality, RÉNO-NE helps pay for a specialist agent.

Does the Neuchâtel subsidy reduce my tax deduction?

Yes: only the part you still bear after the subsidy is deductible, and the invoice year is what counts, according to the Neuchâtel tax notice.

How long do I have to carry out the works in Neuchâtel?

Completion must be reported no later than 24 months after the grant decision. An extension can be granted, as a rule for one year at most; after that, the right to the subsidy lapses.

Official sources and date

retrieved on 2026-10-15