What does it cost to fix radio dead zones in a hotel with a BDA or DAS?

Fixing walkie-talkie dead zones in a hotel almost always means installing a bi-directional amplifier (BDA) or an on-site repeater feeding a distributed antenna system (DAS), and the cost is driven by floor count, floor area and construction, not by a fixed price list. As a planning figure, a small or compact hotel with good riser access typically lands between S$15,000 and S$40,000; a mid-size 15–30 storey property needing a proper multi-antenna DAS runs roughly S$80,000 to S$250,000; and a large or complex hotel with basements, function spaces and shielded back-of-house can reach S$250,000 to S$500,000 or more. Every one of these numbers is indicative until a site survey and link budget are done, because the antenna count is what sets the price.

Why a hotel needs a BDA or DAS in the first place

A licensed UHF (400–470 MHz) walkie-talkie is only good for about 7–10 storeys indoors before reinforced-concrete slabs, lift cores and basement walls drop the signal below the roughly −95 dBm level you need for reliable DMR voice. Hotels are among the hardest buildings to cover because the dead zones sit exactly where housekeeping, security and engineering need to talk: basement carparks, stairwells, lift cars, plant rooms, cold rooms and back-of-house corridors. A single higher-power radio does not solve this — the physics is attenuation through the structure, so the fix is to put the signal inside the building with a distributed system rather than push harder from outside.

What actually drives the cost

The cost of a BDA/DAS is essentially the cost of the antenna network, the active head-end, and the labour to route coax through the risers. The main drivers are:

• Floor count and floor area — each reinforced-concrete slab needs its own antenna layer. A rough planning density is one indoor omni antenna per 700–1,200 sqm of open floor, and more where the floor is partitioned into rooms.

• Construction — dense RC, basement levels and lift shafts add attenuation and antennas.

• Head-end type — an on-site 40 W repeater (about S$3,000–8,000 for the radio) versus an off-air BDA that re-broadcasts an external signal; the BDA is cheaper hardware but adds donor/service antenna isolation risk.

• Shielded areas — kitchens, cold rooms, lift cars and function-room AV enclosures often need dedicated antennas.

• Coax and couplers — vertical trunks and the directional couplers tapped off each floor, staged so every antenna port lands within about ±3 dB of the others.

As a sanity-check benchmark, a designed in-building coverage system typically works out to roughly S$3–8 per sq ft of covered area, but treat that as a bracket, not a quote — a 40-storey tower with three basements costs far more per point than a flat 4-storey resort of the same area.

Repeater or DAS — which does a hotel need?

A compact, low-rise hotel with a central riser can sometimes be covered by a single on-site repeater and a handful of antennas — the S$15,000–40,000 band. Once you are past roughly 10–15 storeys, or you have multiple basements and large function areas, a single repeater cannot deliver 95% coverage and you need a full DAS: a repeater or BDA feeding a riser trunk, with directional couplers dropping a balanced signal to antennas on every floor. The jump from "one repeater" to "DAS" is the single biggest step in the budget, which is why an honest number can only come after the floorplan is read and the link budget computed.

What the recurring costs are

Beyond the capital cost, budget for the IMDA licence and equipment type-approval (see the SCDF/IMDA in-building coverage requirements), an annual licence fee in the order of S$100–400, and repeater/BDA maintenance of roughly S$2,000–10,000 a year. Where the system is relied on for life-safety communications, periodic coverage re-testing against the design grade is also part of the running cost.

Related questions

Is renting walkie-talkies cheaper than installing a DAS? For short events, yes — rental avoids capital cost entirely. But rental radios still fail in the same dead zones; if the coverage problem is structural, no radio model fixes it and a permanent BDA/DAS is the only durable answer.

How many antennas does a hotel actually need? It depends on floor area and partitioning, but plan for roughly one omni antenna per 700–1,200 sqm per floor, plus dedicated antennas for lift cars, basements and shielded back-of-house rooms. The exact count comes out of the link budget, not a rule of thumb.

Do I need an IMDA licence for a hotel repeater or booster? Yes. The radio system requires a licence (a localised private network / station licence) and all equipment must be IMDA type-approved before it is switched on.

How Suneast approaches this

Suneast designs and installs in-building two-way radio coverage for Singapore hotels, starting from a site survey and a UHF link budget rather than a fixed package price. We read the floorplan, compute downlink and uplink margins against a −95 dBm design threshold with a 10 dB fade margin, size the antenna count and coupler schedule to hit 95% area coverage, and handle the IMDA licensing and coverage acceptance testing. That means the quote reflects the building in front of us — the number of floors, the construction and the dead zones that matter — instead of a generic figure that falls apart at audit.