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Regulation Guide · 2026. 07

Decks, Canopies, Awnings —
What Can You Actually Put in Your Yard?

LEA Architects · Junsu Kim, Architect

It's My Land — Why Can't I Do Whatever I Want?

The dream of moving into a single-family home is the yard. Laying a deck, hanging an awning, sipping coffee under a pergola. But a good share of that dream is also a regular feature of unauthorized-structure enforcement. The logic is simple: once you add a roof and columns to create a space, it counts toward building area, and exceeding lot coverage or building without authorization becomes a violation.

Structure Determination Low ground deck (no roof/columns) Effectively a finish-material floor treatment Free to install Retractable awning (motorized/manual) Not a fixed structure — vanishes when retracted Generally allowed Fixed column-supported canopy / awning Area within a setback from the outer edge counts toward building area Lot-coverage check Pergola / gazebo Structure report or building permit depending on scale/structure Verify in advance Prefab shed / container Temporary structure or building report — unreported = violation Report required Roof + windows added over a deck (sunroom conversion) Interior space with walls and roof = extension Extension permit
Outdoor structure determination overview (details vary by scale/structure)

The Logic Behind the Table — 'Does It Fold, or Is It Fixed?'

Two principles run through the table. First, folding structures are treated leniently, fixed ones strictly. A retractable awning is free precisely because it's a temporary structure that vanishes when folded, while a column-supported canopy counts toward building area because it creates permanent space. Second, procedures get heavier as the stage escalates. Floor (deck) → roof (canopy) → walls (sunroom) escalates from free installation → lot-coverage review → extension permit.

The most common accident path is gradual evolution: lay a deck (legal) → add a roof in summer (borderline) → enclose it with windows in winter (extension) — a three-year evolution that completes an unauthorized structure. Each step looks trivial, but the cumulative result is unauthorized extension, subject to enforcement penalties.

The Answer Is to Draw It In at the Design Stage

For new construction, the answer is simple: build outdoor space into the design from the start. Like our Namgok-ri and Iho-ri single-family projects, planning a porch, under-eave space, and yard-connected deck within lot coverage at the design stage eliminates the violation risk that comes from bolting things on after move-in. For an existing home, check your remaining lot-coverage allowance (coverage/FAR guide) and any reporting requirement before building anything. View the Namgok-ri house →

Frequently Asked Questions

Q. Is it illegal to lay a wooden deck in my yard?

A low deck without roof/columns is generally fine. Raising it high or adding roof/columns can bring it into building-area calculation, requiring lot-coverage review.

Q. Can I install a retractable awning?

Retractable awnings are generally exempt and freely installable. Fixed, column-supported canopies count toward building area beyond a certain setback, so check lot-coverage allowance.

Q. I'd like to put a pergola or shed in my yard — is that okay?

Pergolas may need a structure report or permit depending on scale; prefab sheds may need a temporary-structure or building report. Check before installation.

Deck Installation · Canopy Floor Area · Awning Regulations · Pergola · Yard Structures · Single-Family Housing · LEA Architects