Skip to main content
Certyneo
Article L111-1 of the Spanish Act of Accession

Sign a construction project estimate online

Bill of exchange for building works (construction, renovation, repair, maintenance) signed electronically with the same legal value as a paper bill of exchange. Conforms to Article L111-1 of the Consumer Code, to the Hamon Law of 17 March 2014 (right of withdrawal 14 days for work done at home) and to the decree of 2 March 1990 (compulsory bill of exchange for repair/repair/maintenance) advance signature recommended, archiving 10 years included.

Legal framework
Article L111-1 + order of 2 March 1990
Signature level
AES eIDAS recommended
Legal archives
10 years included

What's a construction project quote?

The BTP works quote is the written and numerical offer by which a building professional (entrepreneur, craftsman, company) proposes to his client the realization of works. Article L111-1 of the Consumer Code imposes complete pre-contractual information (features, price, deadlines, guarantees). Above € 1500 TTC, the quote is mandatory (order of 2 March 1990 for troubleshooting / repairs / maintenance on all works). When it is concluded at the client's home (démarchage), the Hamon law (law 2014-344) imposes the mention of the right of withdrawal of 14 days and a standard formula the short period from the signature of the quote.

Why sign electronically?

Withdrawal period 14 days (Hamon law)

For quotes signed at the customer's home (departure), the Hamon law imposes a 14-day withdrawal period starting from the date of signature.

Automated mandatory reporting

The identity of the professional (Siret, RCS, decennial insurance), detailed description of the work, price of the VAT/VAT, applicable VAT rate (5.5% / 10% / 20%), time limit for execution, payment terms, legal guarantees: our templates incorporate all the mandatory information in accordance with the Code conso + Civil Code.

Remote signature fast start

The client receives a secure link via email + OTP SMS on his phone. Signature advanced in 2 minutes, without the movement of the craftsman. The work can start as soon as the withdrawal period ends (14 days if starting, immediately otherwise).

10 years of archiving + 10 years of opponents

The electronically signed quote remains enforceable for 10 years of the ten-year warranty (Art. 1792 Civil Code). Certyneo automatically archives the quote + audit trail eIDAS during this period. In case of disputes over the promised services, the signed PDF is authentic.

The four-step procedure

From prep to legal filing in less than five minutes.

  1. 1. Prepare the budget

    Please download your quote (PDF) or use a compliant template.Mind-set: Siret, ten-year insurance, detailed description, price, VAT rate (5,5% / 10% / 20%), deadlines, payment conditions, right of withdrawal 14j if you call at home.

  2. 2. Send to the customer

    The customer receives a secure email link with OTP text message on their phone.

  3. The following is a list of the most important technical specifications for the European Union:

    The customer reads the quote on his phone or computer, accepts the terms and conditions and signs with OTP SMS. Qualified time stamp confirms the departure of the withdrawal period 14 days (if unlocked).

  4. 4. Start of construction

    After the withdrawal period has expired (or immediately if no one has come to the site), the work begins.

Frequently Asked Questions

Can a construction contract be signed electronically?
The Certyneo advanced signature (AES) fulfils the evidentiary requirements. The Certyneo advanced signature (AES) fulfils the evidentiary requirements.
How much is the quote mandatory?
For troubleshooting/repair/maintenance work on all equipment (plumbing, heating, electricity, locksmiths), the estimate is mandatory from the first euro (order of 2 March 1990).
How can the 14-day withdrawal period (Hamon law) be respected?
For any quote signed at the customer's home (departure), the Hamon law imposes 14 days of withdrawal after signature. Certyneo precisely timestamps the signature with a qualified timestamp in the sense of eIDAS the time limit runs from this moment and is impossible to dispute.
What are the mandatory statements on a construction quote?
Identity of the professional (SIRET, RCS, intra-Community VAT number), ten-year insurance (company + police number + geographical area), detailed description of the work, price, VAT rate, time limit, payment conditions, duration of validity of the quote, mention of the right of withdrawal 14 days if required.
Does the reduced VAT rate (5.5% or 10%) have to be shown on the estimate?
Yes, it is mandatory.The rate applicable must be stated on the quote AND be justified by a simplified customer certificate (CERFA 1300-SD) if VAT reduced.See our dedicated landing page /sign-attestation-tva-reduced-btp-online to sign this certificate.
How long do you need to keep the signed quote?
The quotation is valid for the period of the promised benefits in case of a ten-year litigation. Certyneo automatically archives the quotation + the audit trail during this period.
What if the client refuses to sign ?
Without a signed quote, the professional has no probative value in case of disputes over the scope of the work.
Is the electronically signed quote enforceable in the event of a dispute?
The presumption of reliability of Article 1367 of the Civil Code makes the advanced signature (AES) objectionable without further proof. The audit trail Certyneo (OTP identity, qualified time stamping, SHA-256 hash) is valid before the court.

See also

Sign your next construction quote online

Permanent free plan (5 envelopes/month), without credit card. Complies with Code conso, Hamon law and eIDAS. Archive 10 years included.

Starting for free See the prices