Construction Brief
ProjectsBP2026-18764
General activity · Calgary

Semi-d,fireplace,ssuite

4921 21A ST SW · ALTADORE

Recommended next action · Interpretation

Validate the construction team and ask whether estimating or supplier selection is active.

A building-permit application is active; estimating or supplier selection may be underway.

Verify the latest status with the official source or project team before acting.

Location context

Project location

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Locating 4921 21A ST SW…

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Construction Brief interpretation

Why this matters

OpportunityGeneral activity
Estimated project typeResidential
Estimated current stageBuilding permit application
Likely commercial windowMajor-trade estimatingNow to approximately 4 months
Commercial-window confidence Medium confidence
Record-link confidenceHighAddress-only association; verify the related records

The source indicates new-build or major building scope at permit application; trade estimating may be active, but no procurement date is published.

Evidence behind the ranking

  • Project is still early enough for preconstruction follow-up
  • New or changed public record this week
  • 5 related public records linked to this project
  • Applicant identified in a public record

Relevant trades

Framing and lumber

New semi-detached dwelling with fireplace and secondary suite; estimated cost $296,589.28.

High confidence
Fireplace materials

New semi-detached dwelling with fireplace and secondary suite; estimated cost $296,589.28.

High confidence
Interior finishes

New semi-detached dwelling with fireplace and secondary suite; estimated cost $296,589.28.

Medium confidence
Concrete

The public description indicates new-build, addition, or structural scope.

Medium confidence · Now to approximately 4 months
Plumbing

New-build or multi-unit scope commonly includes plumbing work.

Low confidence · Now to approximately 4 months
Append-only history

Project timeline

  1. InterpretationHigh confidence

    Construction Brief assessment

    Project assessed as general activity at building permit application

    First detected Oct 7, 2026 Underlying source ↗
  2. Verified fact

    Building permit first detected

    Building permit first detected by Construction Brief.

    First detected Oct 7, 2026 Official record ↗
  3. Verified fact

    Building permit first detected

    Building permit first detected by Construction Brief.

    First detected Oct 7, 2026 Official record ↗
  4. Verified fact

    Building permit field changed

    Status: new → cancelled · 2 more fields changed

    First detected Oct 1, 2026 Official record ↗
  5. Verified fact

    Building permit field changed

    Status: new → cancelled · 3 more fields changed

    First detected Oct 1, 2026 Official record ↗
  6. Verified fact

    Building permit field changed

    Status: issued → completed · 1 more field changed

    First detected Oct 1, 2026 Official record ↗
  7. Verified fact

    Building permit application

    Building permit application: Garage

    First detected Oct 7, 2026 Official record ↗
  8. Verified fact

    Building permit application

    Building permit application: SEMI-D,FIREPLACE,SSuite

    First detected Oct 7, 2026 Official record ↗
  9. Verified fact

    Permit completed

    Permit completed: Garage

    First detected Oct 1, 2026 Official record ↗
  10. Verified fact

    Permit completed

    Permit completed: SEMI-D,FIREPLACE,SSuite

    First detected Oct 1, 2026 Official record ↗
  11. Verified fact

    Permit completed

    Permit completed: Demolition at 4921B 21A ST SW

    First detected Oct 1, 2026 Official record ↗
  12. Verified fact

    Building permit first detected

    Building permit first detected by Construction Brief.

    First detected Sep 27, 2026 Official record ↗
  13. Verified fact

    Building permit first detected

    Building permit first detected by Construction Brief.

    First detected Sep 27, 2026 Official record ↗
  14. Verified fact

    Building permit application

    Building permit application: Garage

    First detected Sep 27, 2026 Official record ↗
  15. Verified fact

    Building permit application

    Building permit application: SEMI-D,FIREPLACE,SSuite

    First detected Sep 27, 2026 Official record ↗
  16. Verified fact

    Building permit issued

    Building permit issued: Demolition at 4921B 21A ST SW

    First detected Aug 29, 2026 Official record ↗
  17. Verified fact

    Building permit application

    Building permit application: Demolition at 4921B 21A ST SW

    First detected Aug 28, 2026 Official record ↗
Official evidence

Related public records

SourceRecordRecord dateRetrievedEvidence
City of CalgaryCalgary Building PermitsBuilding permit first detectedBP2026-18765Oct 7, 2026Oct 7, 2026Official source ↗
City of CalgaryCalgary Building PermitsBuilding permit first detectedBP2026-18764Oct 7, 2026Oct 7, 2026Official source ↗
City of CalgaryCalgary Building PermitsBuilding permit field changedBP2026-18439Sep 30, 2026Oct 1, 2026Official source ↗
City of CalgaryCalgary Building PermitsBuilding permit field changedBP2026-18438Sep 30, 2026Oct 1, 2026Official source ↗
City of CalgaryCalgary Building PermitsBuilding permit field changedBP2026-16268Sep 30, 2026Oct 1, 2026Official source ↗
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