Construction project management in Cologny
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 knows Cologny from managing two villa renovations there, shown below. The firm takes over your architect's file once the permit is granted, or draws up the plans and files the application itself as an agent registered on the Geneva MPQ list (mandataires professionnellement qualifiés, the cantonal register of qualified building professionals), then manages the works to SIA standards.
Your building work in Cologny
According to the OCSTAT profile of Cologny, the municipality has 6,149 residents on 364 hectares, with a density of 1,647 inhabitants per km². The cantonal table T 09.02.1.2.01 counts 1,083 residential buildings at the end of 2025. More than three quarters are single-family houses (822), and 261 buildings hold several dwellings.
Recent buildings slightly outweigh old ones, with 259 dating from after 2000 and 203 from before 1946. Requests may therefore be for building or converting a villa as much as for renovating an older house. On a villa, the number of trades and the care that goes into the finishes call for close coordination. The official Cologny website gives information on municipal services.
Procedures in Geneva
Before drawing anything, HMG reviews the plot. The Canton recommends a geo-analysis of its constraints before any filing, and the page Je prépare ma demande d'autorisation (in French) explains the principle. The permit is then examined by the Office des autorisations de construire, the cantonal permit office. A complete demolition, which is what replacing one villa with another involves, needs a separate application. Our guide to permits and procedures for building work sets out the route.
Types of work in Cologny
- Villa renovation, a kind of project HMG has already managed in the municipality.
- Villa construction, in a municipality where 822 residential buildings are single-family houses.
- Building conversion, when the house is changed in depth.
- House extension, after a study of the rules on the plot.
- Apartment renovation, in the 261 buildings with several dwellings.
- Energy renovation, above all for the 203 buildings from before 1946.
How HMG manages your project in Cologny
Many villas are designed by an architect chosen by the owner. HMG then takes over the file after the permit and manages construction, working with that architect. When the owner prefers a single agent, HMG also produces the plans and files the application.
The firm draws up a general estimate by CFC code (Code des frais de construction, the Swiss building cost classification), runs the tenders and negotiates the contracts. During the works, it coordinates the contractors, checks construction details with the architect and keeps the owner informed of costs. HMG is independent of the contractors, so bids are compared without bias.
Municipalities in the same sector
Cologny shares its sector with fourteen other municipalities. Seven of their pages are listed below.
HMG projects in Cologny
Frequently asked questions
Has HMG already worked in Cologny?
Yes. Two villa renovations the firm managed in Cologny are shown on this page, each with a link to its project page. HMG has managed five villas in all.
What share of buildings in Cologny are single-family houses?
According to OCSTAT, 822 of the 1,083 residential buildings are single-family houses at the end of 2025, more than three quarters. Villa work is therefore the most frequent.
Can a villa be demolished to build a new one?
It can, if the rules that apply to the plot allow it. The demolition then has its own application, distinct from the one for the new villa, and HMG coordinates the two files.
Related guides and pages
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