What really decides whether a shaft can be built
First, the wall. The shaft supports itself, but it adjoins the building, and at every stop a door opening appears in the external wall. In the brick wall of an old building, this is an intervention in a load-bearing structure: lintels are needed, sometimes the piers between openings must be strengthened, and before that comes a survey. The actual strength of the masonry is revealed by the survey, not by the building's technical passport.
Second, what lies underground. The shaft needs a foundation and the car needs a pit, and both end up in the ground right below the facade. That is exactly where surprises are most often found: water mains, sewers, heating pipes, cables, drainage that was once laid "however it turned out". Rerouting a utility line means a separate design, separate approvals and separate money that the client's budget usually does not have. That is why we check the pit location on the very first visit, not once the contract has been signed.
Third, the permits. An extension changes the building's external dimensions, so it is not routine repair but reconstruction: a design and approval from the urban planning and architecture authority. Where the buildings are protected, the cultural heritage protection authority joins the planners, and then the very subject of the work is worded differently: in Chernivtsi at 1 Hrushevskoho St., our contract is described as repair and restoration work to adapt the building for accessibility, not as construction.
Fourth, and this is worth knowing in advance: the approvals regularly take longer than the installation. The client counts the weeks of construction work, but the calendar is eaten up by the survey, design, expert review and approvals. That is exactly why we fix the timeframe after the survey and design development, not at the first conversation.