Construction project management in Troinex
Planning building work? Apartment, house or building renovation, a new storey or a roof extension, running the project is our job.
In Troinex, more than one residential building in three was built after 2000 and close to three in four are single-family houses. HMG Construction Management SA manages your building work there, from interior alterations to extensions. The firm draws up the plans, files the application as a registered MPQ agent and runs the site.
Your building work in Troinex
Troinex has 3,365 residents at the end of 2025 on 343 hectares, according to the Troinex profile at OCSTAT, which is 981 people per square kilometre. The cantonal table of buildings lists 700 residential buildings there at 31 December 2025. Of these, 522 are single-family houses and 178 hold several dwellings.
What sets the municipality apart is the share of recent construction. 239 buildings were completed after 2000, against 126 before 1946. In a house from this century, the structure and envelope are generally sound, and projects are about how the home is used. A kitchen is replaced, a floor is replanned, a basement or attic is fitted out, the house is adapted to a family that has changed.
The 126 buildings from before 1946 call for a different approach, with a full survey before any pricing. For municipal formalities, see the Troinex municipal website (in French).
Permits in Geneva
Work that stays inside an existing building, or does not alter its general appearance, falls under the fast-track procedure (APA). A private owner may file an APA in person, but the canton advises using a registered agent. Filing is done online on the AC-Démat platform, in a free personal account.
The canton also recommends a geo-analysis of the plot's constraints before filing, which is useful as soon as an extension is on the table. Our guide to building permits and procedures in Geneva goes over these points, and the page on permit types gives the official list of procedures.
Types of work in Troinex
- Villa renovation, the typical project with 522 single-family houses out of 700 buildings.
- Kitchen renovation, often the first wish in a house built after 2000.
- Attic conversion, to create a bedroom or study under the roof.
- House extension, when the existing floor area is no longer enough.
- House energy renovation, the priority for houses of earlier generations.
How HMG runs your project in Troinex
You choose the arrangement. HMG can take on everything, meaning the plans, the permit application, the costing, the choice of contractors and the management of the works. If an architect is already advising you, they lead the design up to the permit and HMG then takes over the file for construction, alongside them.
In a recent, lived-in house, the challenge is to keep disruption down. The firm breaks the job into short stages, sets the order in which the trades come in and makes sure finished rooms are handed back clean. You receive a cost statement at each stage. Supervision follows SIA standards, up to the clearing of defects.
Municipalities in the same area
Troinex lies on the left bank, between the Rhône and the Arve. The firm also works in these municipalities of the area.
HMG projects in the canton of Geneva
Frequently asked questions
Is the housing in Troinex recent?
A good part of it is. Out of 700 residential buildings, OCSTAT counts 239 built after 2000 and 126 before 1946. Work therefore often concerns interior alterations more than structure.
Do I need a permit to redo the inside of a villa in Troinex?
Interior changes to an existing building fall under the fast-track procedure known as APA. The firm checks whether your work is concerned and prepares the file if so.
Can we live in the house during the works?
Often yes, if the site is organised by zones. The firm builds this into the programme and discusses it with you before consulting contractors, because it affects how long the work takes.
Related guides and pages
Request a call back
Describe your project in a few lines. HMG calls you back within 24 hours.