Optical Fibre vs. WiFi for an Apartment Building: What to Choose and Why?

Are you planning to introduce internet for an entire apartment building or panelák and unsure whether to choose optical fibre (FTTH/FTTB) or wireless WiFi connection? Both technologies have their place, and different solutions suit different types of buildings. This article will help you decide based on concrete facts, not marketing slogans.

Basic principles of both technologies

Optical fibre (FTTH/FTTB) transmits data as light impulses through glass or plastic fibres. It is physical infrastructure that must be physically installed into the building and each floor (or flat). Once installed, it provides extremely fast and stable connectivity.

Wireless WiFi connection The outdoor unit works by having the ISP install a directional antenna on the building's roof, which connects to the nearest ISP transmitter. This radio frequency connection replaces the incoming cable. Inside the building, distribution can be either via WiFi or cabled.

Detailed comparison table

When to choose fibre optics?

Optical fibre is the ideal choice in these situations:

• New or renovated building - cable routes can be planned from the outset with minimal costs
• Larger apartment building (30+ flats) - with a higher number of flats, installation costs are spread out to an acceptable price per flat
• Requirement for maximum performance - if the building is occupied by demanding users (home office, gaming, 4K streaming)
• Long-term investment - The building's owners' association plans to own the property long-term and requires infrastructure that will last for decades.
• Availability of fibre optics on the street - if the ISP has fibre in the local network, the cost of connecting the house is lower

When does a Wi-Fi connection make sense?

Wireless WiFi solutions are a good choice under these conditions:

• Historic or protected building - where ceiling penetrations and cable routes are not possible or are prohibitively expensive
• Smaller houses (up to 20 flats) - where the cost of optical installation would be too high for an apartment
• Quick solution - you need internet as soon as possible, without waiting for excavation work or building permits
• Bridging solution - until the ISP brings fibre to your street, WiFi is a solid alternative

Installation costs: Real figures

The most common question from the building's owners' association committees is: "How much will it cost?" An indicative overview for an average panel building in Prague with 40 flats:

Hybrid solution: The best of both worlds

In practice, many ISPs offer a combination: a wired connection to the building's roof with WiFi, but distribution inside the house via Ethernet or fibre optics to each flat. This solution offers:

• Fast and cheap installation of the supply line (WiFi to the roof)
• Reliable and fast internal distribution within the building (cabling).
• Option for later migration to full fibre without replacing internal cabling.

Conclusion: How to decide?

If your building meets the requirements for fibre optics and you have the owners' consent for construction work, fibre is undoubtedly a better investment. It provides higher speeds, better stability and will last decades without an upgrade.

If construction work is problematic or you are looking for a quick solution, high-quality WiFi from a local ISP such as sousedsky.net in Prague is an excellent alternative with immediate results.

In both cases, the key message is clear: collective internet for the entire building is significantly cheaper than individual tariffs. Save 50-70% compared to what each flat pays separately.