Secondary suite¶
A self-contained dwelling unit located on the same property as a principal residence, attached internally or provided as a detached accessory dwelling.
Core Idea¶
A secondary suite is an additional independent residential unit subordinate to a primary dwelling on the same property. Existing floor area or an accessory structure is configured with essential living facilities, increasing housing capacity without subdividing the parcel into a conventional separate lot. The abstraction is therefore identified by a declared carrier, a transformation or constraint over that carrier, and an invariant that tells an analyst whether the named structure is genuinely present.
The load-bearing residual is not the broad topic of housing. It is small-scale infill housing embedded within a primary residential property. That residual remains recognizable when examples, notation, scale, or implementation change, but it disappears if the carrier is mistyped, the condition that the unit is independently habitable yet legally and spatially accessory to the principal residence under local rules fails, a neighboring object is substituted, or notation and topical resemblance replace the constitutive test.
Scope of Application¶
Secondary suite belongs to housing and is useful where the analyst can specify a residential parcel, principal dwelling, subordinate independent unit, kitchen and sanitation facilities, entrance and utilities, occupants, zoning and building code, tenure and site form, then evaluate the unit is independently habitable yet legally and spatially accessory to the principal residence under local rules. The scope is broad within that domain but bounded by the need for the unit is independently habitable yet legally and spatially accessory to the principal residence under local rules. This is a planning identity, not construction or legal advice; local codes and qualified professionals govern real projects.
Clarity¶
The abstraction clarifies a crowded vocabulary by making the unit is independently habitable yet legally and spatially accessory to the principal residence under local rules the center of the account. A claim should name the carrier, the governing operation or relation, the applicable assumptions, and the recognition test. A bare label is insufficient because the name Secondary suite can be used for a formal identity, an implementation, or a neighboring result unless carrier and convention are stated.
Manages Complexity¶
Without the abstraction, an analyst must reason directly over many local details: the carrier roles, admissibility assumptions, competing conventions, derived invariants, boundary cases, and proof or validation obligations specific to Secondary suite. Secondary suite compresses them into the roles in the structural signature. That compression permits comparison across instances without erasing the variables that determine validity. It also exposes which details may be varied safely and which are constitutive.
Abstract Reasoning¶
- Identify the carrier. State what the elements, states, objects, or observations are: a residential parcel, principal dwelling, subordinate independent unit, kitchen and sanitation facilities, entrance and utilities, occupants, zoning and building code, tenure and site form. Reject examples whose alleged carrier belongs to a different problem. 2. Lock the constitutive rule. Express the unit is independently habitable yet legally and spatially accessory to the principal residence under local rules independently of one notation or implementation.
Knowledge Transfer¶
Knowledge transfers strongly among subfields of housing because they reuse a residential parcel, principal dwelling, subordinate independent unit, kitchen and sanitation facilities, entrance and utilities, occupants, zoning and building code, tenure and site form, Existing floor area or an accessory structure is configured with essential living facilities, increasing housing capacity without subdividing the parcel into a conventional separate lot., and type the carrier, state every parameter and convention in the definition, test that the unit is independently habitable yet legally and spatially accessory to the principal residence under local rules, compare the nearest accepted identity, and report counterexamples, uncertainty, and limiting cases.
Relationships to Other Abstractions¶
Current abstraction Secondary suite Domain-specific
Parents (1) — more general patterns this builds on
-
Secondary suite is a kind of Composition Prime
The proposed strict upward parent is
prime:composition.
Hierarchy path (1) — routes to 1 parentless root
- Secondary suite → Composition → Gestalt Principles → Holism
Neighborhood in Abstraction Space¶
Secondary suite sits in a moderately populated region (58th percentile for distinctiveness): it has near-neighbors but no dense thicket of look-alikes.
Family — Unclustered & Miscellaneous (1565 abstractions)
Nearest neighbors
- Lease purchase contract — 0.87
- Habitability — 0.87
- Tenant-right — 0.87
- Local property — 0.86
- Hypostyle — 0.86
Computed from structural-signature embeddings · 2026-09-08