Construction Brief
ProjectsDP2026-02126
General activity · Calgary

Semi-detached dwelling, secondary suite (basement - 2), accessory residential building (garage)

4921 21A ST SW · ALTADORE

Recommended next action · Interpretation

Approach the applicant or project team about specification and preconstruction needs.

Development approval can precede detailed permits and trade procurement.

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 stageDevelopment approved
Likely commercial windowPreconstructionNow to approximately 3 months
Commercial-window confidence High confidence
Record-link confidenceHighAddress-only association; verify the related records

Development approval can move a project toward detailed design and building permits.

Evidence behind the ranking

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

Relevant trades

HVAC and mechanical

Rule-matched new construction or addition

Medium confidence
Plumbing

Rule-matched new construction or addition

Medium confidence
Electrical

Rule-matched new construction or addition

Medium confidence
Append-only history

Project timeline

  1. Verified fact

    Building permit field changed

    Status: issued → cancelled · 1 more field changed

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

    Permit completed

    Permit completed: Garage

    First detected Oct 7, 2026 Official record ↗
  3. InterpretationHigh confidence

    Construction Brief assessment

    Project assessed as general activity at development approved

    First detected Sep 24, 2026 Underlying source ↗
  4. Verified fact

    Development permit field changed

    Status: in_review → issued · 1 more field changed

    First detected Sep 24, 2026 Official record ↗
  5. Verified fact

    Development permit released

    Development permit released: NEW: SEMI-DETACHED DWELLING, SECONDARY SUITE (BASEMENT - 2), ACCESSORY RESIDENTIAL BUILDING (GARAGE)

    First detected Sep 24, 2026 Official record ↗
  6. Verified fact

    Development decision

    Development decision: NEW: SEMI-DETACHED DWELLING, SECONDARY SUITE (BASEMENT - 2), ACCESSORY RESIDENTIAL BUILDING (GARAGE)

    First detected Aug 10, 2026 Official record ↗
  7. Verified fact

    Permit completed

    Permit completed: Garage

    First detected Jul 29, 2026 Official record ↗
  8. Verified fact

    Permit completed

    Permit completed: Garage

    First detected Jul 29, 2026 Official record ↗
  9. Verified fact

    Development application

    Development application: NEW: SEMI-DETACHED DWELLING, SECONDARY SUITE (BASEMENT - 2), ACCESSORY RESIDENTIAL BUILDING (GARAGE)

    First detected Jul 29, 2026 Official record ↗
  10. Verified fact

    Building permit issued

    Building permit issued: Garage

    First detected Jul 29, 2026 Official record ↗
  11. Verified fact

    Building permit application

    Building permit application: Garage

    First detected Jul 29, 2026 Official record ↗
Official evidence

Related public records

SourceRecordRecord dateRetrievedEvidence
City of CalgaryCalgary Building PermitsBuilding permit field changedBP2025-15424Oct 6, 2026Oct 7, 2026Official source ↗
City of CalgaryCalgary Development PermitsDevelopment permit field changedDP2026-02126Sep 23, 2026Sep 24, 2026Official source ↗
City of CalgaryCalgary Building Permitsbuilding_permit · record_updatedBP2024-00701Jul 13, 2026Jul 29, 2026Official source ↗
City of CalgaryCalgary Building Permitsbuilding_permit · record_updatedBP2024-00698Jul 13, 2026Jul 29, 2026Official source ↗
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