Updated October 2026

Retaining Wall Permit & Bylaw Guide

Nanaimo Retaining Walls follows local building rules across 8 Vancouver Island communities. In Nanaimo, Qualicum Beach, Ladysmith, and Duncan, building permits apply to walls over 1.2 metres. The City of Parksville requires a permit for any retaining wall 1.2 m or higher. You receive a free site visit and a written quote detailing what your lot needs.

A building permit is formal municipal authorization ensuring structural retaining walls meet local zoning, setback, and engineering safety rules.

Read about our engineered retaining walls on taller builds for structures requiring engineer oversight.

City of Nanaimo permit requirements

The City of Nanaimo Retaining Wall Guide states that "Building permits are required for the construction of all retaining walls that are … greater than 1.2m in height." For walls over 1.2 m, "the property owner must engage the service of a registered professional engineer." An application fee applies "when the estimated value of construction exceeds $20,000." Retaining walls "must conform to the maximum fence height in Zoning Bylaw 4500."

District of Lantzville permit rules

Under District of Lantzville Building Bylaw No. 182, "A building permit is not required for … retaining walls". We review your site layout with you during our free visit before building.

RDN electoral areas (Nanoose Bay & Gabriola Island)

Under Regional District of Nanaimo Building Regulations Bylaw No. 1250, retaining walls "under 1.0 m in height that retain less than 1.0 m of earth" are not counted as structures. The RDN checklist is headed "Retaining Wall — New Construction (more than 1.0 metres in height)", with a $150 processing fee and a $25 title search fee. In Nanoose Bay, RDN Zoning Bylaw No. 2500 treats walls 1.2 m or taller as structures with setbacks, a 3.0 m maximum height limit, and counts walls less than 2 m apart as one structure.

City of Parksville permit guidelines

The City of Parksville requires a building permit for any "retaining wall 1.2 m or higher". We assist you with property details after examining your site.

Town of Qualicum Beach permit rules

Under Town of Qualicum Beach Building Bylaw No. 903, 2024, a permit is required to build a retaining wall, which is defined as "a structure exceeding 1.2 metres in height". The bylaw further states that "A registered professional shall undertake the design, and conduct field reviews of a retaining wall."

Town of Ladysmith permit regulations

Town of Ladysmith Building & Plumbing Bylaw 2024, No. 2174 states "A person shall not construct, or structurally repair, a retaining wall greater than 1.2 meters in height, without a building permit." Furthermore, "All retaining walls located within 1.2 meters of each other will be collectively considered a single retaining wall for the purpose of determining height."

City of Duncan permit requirements

The City of Duncan requires a building permit to "construct retaining walls greater than 1.2 m in height or any retaining wall in a Hazard Lands Development Permit Area." We inspect your ground conditions to determine what your property needs.

Municipal permit threshold summary
Community	Authority	What triggers a permit
Nanaimo	City of Nanaimo	Walls "greater than 1.2m in height"
Lantzville	District of Lantzville	"A building permit is not required for … retaining walls"
Nanoose Bay, Gabriola Island	Regional District of Nanaimo	New construction "more than 1.0 metres in height"
Parksville	City of Parksville	"retaining wall 1.2 m or higher"
Qualicum Beach	Town of Qualicum Beach	A wall "exceeding 1.2 metres in height"
Ladysmith	Town of Ladysmith	A wall "greater than 1.2 meters in height"
Duncan	City of Duncan	Walls "greater than 1.2 m in height" or in a Hazard Lands Development Permit Area

For pricing, see the cost guide.

Review municipal permit thresholds across all eight locations on our service areas page.