Construction project management in Cartigny
Planning building work? Apartment, house or building renovation, a new storey or a roof extension, running the project is our job.
HMG Construction Management SA supports property owners in Cartigny through their building work, from the first survey to the final account. In a municipality where old buildings weigh heavily, the firm starts by examining the building, then draws the project, files the permit application as a registered MPQ agent and manages the site to SIA standards.
What should you know before building work in Cartigny?
With 1,047 residents at the end of 2025 and 239 residents per square kilometre, Cartigny is a sparsely populated municipality. The figures appear on its OCSTAT profile, which gives it 438 hectares. The building stock is modest, with 264 residential buildings at 31 December 2025 according to the cantonal table of buildings.
Two proportions sum it up. Two buildings in three are single-family houses, 176 exactly. And 120 buildings, more than four in ten, were built before 1946. Only 44 date from after 2000, one in six. The typical project is therefore the overhaul of an old house, where the roof structure, the covering, the walls and the services are dealt with together instead of piecemeal.
The Cartigny municipal website (in French) gives the council's contact details.
Permits in Geneva
With an old house it pays to consult the authorities early. A preliminary application, called DP (demande préalable), obtains an answer on the siting, use, height, volume and access of a project before all the studies are commissioned. The canton's page on permit types presents this option, and the Office des autorisations de construire, the cantonal permit office, examines the files. We set out the choice between DP, the fast-track APA and the full DD application in our guide to permits and procedures.
Types of work in Cartigny
- House renovation, for the 176 single-family houses.
- Roof renovation, the usual starting point on pre-1946 buildings.
- Attic conversion, to study at the same time as the roof.
- Building conversion, to give an old volume a new use.
- Energy renovation, with grants requested before the works.
How HMG manages your project in Cartigny
Who does what is settled at the first meeting. Either you give HMG the whole job, and the firm draws up the plans and files the permit application as an agent registered on the Geneva MPQ list (mandataires professionnellement qualifiés, the cantonal register of qualified building professionals) before managing the works. Or you have chosen an architect to design the project, and HMG comes in after the permit, working with them on everything to do with construction.
An old house is renovated in a set order, first the structure and the weatherproof shell, then the services, lastly the finishes. HMG turns that order into a schedule, awards each package after comparing bids and holds contractors to their dates. The firm tracks costs package by package and flags any variance before it is committed, so the decision stays yours.
Municipalities in the same sector
In the Champagne sector, the firm also has a page for each of the six other municipalities.
Projects by HMG in the Canton of Geneva
Frequently asked questions
How much of Cartigny is old property?
A large part. OCSTAT counts 120 residential buildings from before 1946 against 44 from after 2000, out of 264 in all. Old buildings therefore outnumber recent ones by nearly three to one.
What is a preliminary application for?
It obtains the authorities' position on the siting, use, height, volume and access of a project. You avoid paying for full studies on a scheme that could not be permitted.
Can a project be carried out in stages?
Yes, provided the technical order is respected. The firm draws up an overall plan, then divides the works into coherent stages, so that nothing just completed has to be undone later.
Related guides and pages
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