Thomas & Piron
Residential builder and developer in the Grand Duchy. Each residence is delivered under a financial completion guarantee and marketed by agencies that are members of the Chambre Immobilière.
What supports trust
Five audited, enforceable and dated indicators. No figure is published without source or Chamber control.
What the developer builds
Residences currently marketed and recently delivered. Each programme opens a profile with typologies, starting prices and the agency authorised for sales.
Where the developer operates
The portfolio covers the capital and the southern and central cantons. The map locates each delivered or current programme.
The women and men
Integrated project ownership, with buyer relations held by the authorised agency, never by an isolated broker.
Institutional credit
Three superimposed levels of guarantee — verification, bank guarantee, signed charter — completed by legal construction guarantees.
Identity, authorisation and operation register are checked by the Chamber. The profile is published only after verification.
Each programme is backed by a completion guarantee issued by a bank: delivery is guaranteed even if the developer defaults.
Eleven enforceable commitments on price, schedule and guarantee transparency, co-established with the Fédération de l'Immobilier.
Completion of the residence is guaranteed by a bank surety through delivery.
Coverage for damage affecting the structural integrity of the works for ten years.
Remedy of reservations reported during the first year after acceptance.
Prefinancing of repairs covered by the ten-year guarantee, without prior liability determination.
The developer adheres to the VIVI trust charter, co-established with the Fédération de l'Immobilier. Eleven enforceable commitments cover price, schedule and guarantee transparency.
Financing, step by step
An off-plan purchase staggers payment according to construction progress, with tax schemes specific to the Grand Duchy.
Super-reduced rate applied to construction of a main residence, subject to conditions and a ceiling.
Tax credit on registration and transcription duties for a main residence.
For off-plan sales, duties apply only to the land share, not to the building still to be constructed.
Indicative estimate, excluding insurance and fees. Not a loan offer. Source — indicative schedule, updated May 2026.
How to start the relationship
A four-step process, from first contact to notarised reservation. Each programme has a single reference agency.
A qualified form specifies your project, typology and purchase horizon.
The authorised agency for the programme contacts you, checks fit and opens the file.
Presentation of plans, specifications and availability; unit selection off-plan or on site.
Reservation contract, followed by a notarised off-plan deed covered by the financial completion guarantee.
The developer does not market directly. Each programme is entrusted to a member agency of the Chambre Immobilière, responsible for buyer relationship quality.
In images and in words
"Handover matched the announced schedule, with no major reservation. The agency remained the same contact from preliminary agreement to keys."
"Payment calls followed actual construction progress, recorded by a bailiff. There was no price drift between reservation and deed."
"Energy documentation was provided before signing: class A was confirmed at handover and heating charges matched the estimate."