Where a rooftop winter garden can be built
A rooftop winter garden is suitable for:
- Accessible flat roofs of private homes
- Penthouse terraces in apartment buildings (subject to approvals)
- Roofs of commercial buildings (restaurants, spa venues, lounges)
- Accessible roofs of hotels and glamping resorts
Technical requirements
The key prerequisite is the load-bearing capacity of the slab. For a winter garden, the minimum should be 500 kg/m², accounting for glass, framing, furniture, occupants, and snow. For projects with large plants — up to 800 kg/m².
Roof waterproofing must be a two-layer membrane plus a protective coating. The slope should be at least 1.5° for water runoff, with a drainage system around the perimeter.
Snow and wind loads
For Moscow, the design snow load is 180 kg/m² (Zone IV). For a winter garden atop a tall building, wind load increases by 20–30% compared with a ground-level structure.
| Region | Snow load | Wind load (at h = 15 m) |
|---|---|---|
| Moscow and the Moscow Region | 180 kg/m² | 50 kg/m² |
| St. Petersburg and the Leningrad Region | 200 kg/m² | 60 kg/m² |
| Sochi, Krasnodar Krai | 80 kg/m² | 85 kg/m² |
Rooftop winter garden pricing
The price depends on the area, installation access (ground crane or vertical lift), and the complexity of integration with the roofing system.
- 25 m² on a private home — from RUB 1.8 million
- 50 m² on an accessible terrace — from RUB 3.5 million
- 80 m² on a penthouse — from RUB 5.5 million
- 150 m² on a commercial building — from RUB 9 million
Approvals for a penthouse in an apartment building
A rooftop winter garden on an apartment building requires approval from the management company and the BTI (technical inventory bureau). Approval takes 3–8 months. Not every management company will cooperate — clarify their position in advance.