Washington · ERRCS / BDA requirements
ERRCS requirements in Washington
Washington's state fire code requires approved in-building emergency responder communications enhancement (ERCES) coverage in all new buildings, based on the public safety signal measured outside. Existing buildings other than Group R-3 without approved coverage must add it when a wired system cannot be repaired or is replaced, or within a time frame the local adopting authority sets.
Guidance, not engineering advice. Rules on this page come from the documents listed under Sources. Confirm with your local fire code official (the authority having jurisdiction) before you design, permit or test a system.
Local fire marshals in Washington
Each local AHJ sets its own signal levels and permit steps within the state rules.
| Jurisdiction | Type | Downlink signal | Confidence | Last verified |
|---|---|---|---|---|
| Pierce County | County | -95 dBm | medium | Oct 25, 2026 |
| Seattle | City | Not published; confirm with the fire marshal | medium | Oct 25, 2026 |
Who must comply
| Rule | Effect | Citation | Source |
|---|---|---|---|
| Approved in-building ERCES coverage must be provided in all new buildings, based on existing public safety signal levels at the building exterior. Exceptions: an approved wired system, or the fire code official finds coverage is not needed. | Must meet | WAC 51-54A-0510, Section 510.1 | Washington State Legislature |
| Section 1103.2 applies to existing buildings other than Group R-3. | Not required | WAC 51-54A-1103, Section 1103.2 | Washington State Legislature |
| Existing buildings without approved coverage must add it where an existing wired communication system cannot be repaired or is being replaced, or within a time frame set by the local adopting authority, unless the fire code official finds it is not needed. | AHJ may require | WAC 51-54A-1103, Section 1103.2 | Washington State Legislature |
| Trigger | Published value |
|---|---|
| Minimum building size | Not published; confirm with the fire marshal |
| Minimum stories | Not published; confirm with the fire marshal |
| Height trigger | Not published; confirm with the fire marshal |
| Below-grade areas | Not published; confirm with the fire marshal |
| Building types named | Not published; confirm with the fire marshal |
| Existing buildings must retrofit | Yes |
| Compliance deadline | Not published; confirm with the fire marshal |
Local fire codes in Washington (for example Seattle's) add their own amendments and thresholds. Exceptions in the state text: an approved wired communication system, a fire code official finding that coverage is not needed, or an automatically activated system where a system would disrupt operations.
Signal and coverage
| Requirement | Value |
|---|---|
| Minimum downlink signal | -95 dBm |
| Minimum uplink signal | Not published; confirm with the fire marshal |
| Delivered audio quality (DAQ) | 3.0 |
| Coverage, general areas | 95% of floor area |
| Coverage, critical areas | 99% of floor area |
| Critical areas named | Areas designated as critical by the fire code official |
| Public safety radio bands | Not published; confirm with the fire marshal |
Inbound signal of at least -95 dBm in 95% of the coverage area and 99% of critical areas, with DAQ 3.0 or equivalent SINR. Standby power: 12 hours at 100% capacity (dedicated batteries, or 2-hour batteries plus generator). Equipment listed to UL 2524.
How coverage is tested
One floor, 20 squares, a radio check in each
- 20 test areas per floorEach floor is divided into a grid of 20 roughly equal areas.IFC 2021 510.5.4
- One test spot per areaA spot near the center stands for the whole area. No extra spots after it is chosen.
- One failed area is allowedMore than one failed area fails the floor. With exactly two, the floor may be re-divided into 40 areas, and up to two non-adjacent failures are allowed.IFC 2021 510.5.4
- Critical areas count moreTypical model-code targets: 95 percent of all areas and 99 percent of critical areas such as stairs and elevator lobbies. Your fire marshal sets the numbers that apply to you.IFC 2021 510.4.1
Illustration: 19 of 20 areas pass, so this floor passes. Some fire departments use other numbers; Miami-Dade, for example, stops an acceptance test below 90 percent of general areas.
Testing
| Test | What the source says | Source |
|---|---|---|
| Acceptance test | After installation the owner has the system tested to show two-way coverage on each floor meets Section 510.4.1, using grid testing with a calibrated spectrum analyzer and talk-back tests scored on DAQ (3 or higher passes), including each critical area and each stairwell landing. | WAC 51-54A-0510, Section 510.5.4 |
| Annual test | The owner has the system inspected and tested annually and after structural changes: coverage test, booster gain check, 1-hour battery load test, component checks and a fire alarm supervision test, with a report to the fire code official. Annual testing is not required inside Group R dwelling units. | WAC 51-54A-0510, Section 510.6.1 |
| Five-year test | Section 510.6.1.1 lets a shorter alternative annual coverage test be used when the acceptance documentation, or the most recent full five-year test results for systems older than six years, are available. The text refers to a full five-year test but we have not found where it sets that test's schedule; confirm with the fire marshal. | WAC 51-54A-0510, Section 510.6.1.1 |
| Coverage assessment interval | Not published in the documents we read; confirm with the fire marshal. | None found |
Permit and inspection process
- A construction permit is required to install or modify the system; maintenance is not a modification. WAC 51-54A-0510, Section 510.3
- The system type is determined by the fire code official and the frequency license holder. WAC 51-54A-0510, Section 510.1
Designers and lead acceptance testers need an FCC general radio telephone operator license plus in-building system training (Section 510.5.3).
Codes and standards referenced
Notes
Read in the Washington Administrative Code on the Legislature's site. These sections amend the International Fire Code; the unamended IFC text is not reproduced here.
Next step
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Questions people ask
Does Washington require ERRCS in every new building?
The state fire code requires approved in-building coverage in all new buildings, measured against the public safety signal outside. A system is needed only where the building cannot meet the signal levels, and the fire code official can find coverage is not needed (WAC 51-54A-0510, 510.1).
Sources
Primary documents we read for this page. Rules change; confirm with your fire marshal (AHJ).
- WAC 51-54A-0510, Emergency responder communication coverage (Washington amendments to the International Fire Code, effective 3/16/24), Washington State Legislature
- WAC 51-54A-1103, Fire safety requirements for existing buildings (Section 1103.2, effective 3/15/24), Washington State Legislature