For most tenant improvements, retail buildouts, hospitality projects and multi-family renovations, a curbless shower is the better long-term choice, unless the building’s structure, drainage or budget rules it out. We size this decision around BC Building Code waterproofing requirements, accessible-ready clauses and the realities of working inside occupied buildings. The sections below cover installation, permitting, cost and how to vet a contractor’s bid.

TL;DR:

  • Since March 8, 2024, new commercial and public buildings in BC must meet updated accessibility rules, including accessible clearances and adaptable units.
  • A curbless shower needs continuous floor and wall waterproofing, a slope of a quarter inch per foot, and a flood test before tiling.
  • Vancouver typically requires a plumbing permit and inspection for curbless conversions; strata owners should check alteration bylaws and retain approvals, inspection records, and warranty documents.
  • Curbed showers retrofit easily into existing bathrooms and contain splashes better, while accessible suites favor curbless layouts requiring slip resistant tile and frequent commercial cleaning.
  • Require bids to identify membrane type, warranty length, inspection timing, and trade sequencing, since missed approvals can force crews to remove finished flooring.
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Table of Contents

What curbless and curbed showers actually are

A curbless shower has a flush, zero-threshold entry: the floor runs level from the bathroom into the shower, with no raised barrier to step over. A curbed shower keeps a raised threshold, usually 2 to 4 inches high, that contains water inside the shower pan and keeps it off the main bathroom floor.

The two designs manage drainage differently, and that difference drives almost every downstream decision a contractor makes:

  • Curbless showers typically use a linear drain along one wall and slope the entire bathroom floor slightly toward it.
  • Curbed showers contain the slope inside the pan itself, so the rest of the bathroom floor stays flat.
  • Curbless designs demand more precise subfloor work because there is no curb to mask small framing irregularities.
  • Curbed designs are generally faster to tile because the wet zone is clearly bounded by the curb.

These differences matter most when a building has an existing concrete slab or wood subfloor that was never built with a sloped wet room in mind.

Pros and cons: performance, accessibility and operations

Property managers choosing between the two designs are really weighing accessibility and guest experience against containment and renovation simplicity. Each option suits a different mix of building type, tenant profile and maintenance capacity.

  • Curbless showers give wheelchair users, walkers and aging tenants step-free access, which matters for assisted living, hospitality and any unit marketed as accessible.
  • Curbed showers contain splashing water more reliably, which protects adjacent flooring and reduces slip risk outside the shower stall.
  • Curbed showers are usually simpler to retrofit into an existing bathroom because they do not require re-sloping the whole floor.
  • Curbless showers need slip-resistant tile and careful drain placement to perform well under high-frequency commercial cleaning.
  • Privacy can be a factor with open, curbless layouts in shared or dormitory-style facilities, where a curb and door combination keeps water and sightlines contained.

Neither option wins outright. A coffee shop staff washroom and an accessible-ready multi-family suite have different priorities, and the right answer follows the building’s use, not a blanket preference.

Installation and waterproofing: what a contractor must get right

Curbless showers fail more often from waterproofing shortcuts than from design choice itself. Because the wet zone extends across the whole bathroom floor rather than staying contained behind a curb, the membrane and slope work have almost no margin for error.

Membrane covering a sloped shower floor

A continuous, floor-to-wall waterproofing membrane is essential on curbless jobs. Without it, the whole-room wet zone becomes a common cause of premature failures in barrier-free renovations, with water migrating under tile and into adjacent framing.

A reliable installation sequence looks like this:

  1. Rough-in plumbing and confirm the drain location against the structural slope plan.
  2. Install the waterproofing membrane across the entire wet zone, floor and walls, with no gaps at transitions.
  3. Pour or float the slope to the drain within tight tolerances, typically a quarter inch per foot.
  4. Set tile and grout once the membrane has cured and passed a flood test.
  5. Schedule the plumbing inspection before the floor is closed in.

Pro Tip: Require a flood test on curbless showers before tile goes down. It is the cheapest insurance against a callback months after occupancy.

We schedule this work around building hours when the project sits inside an occupied floor, so tenants and residents are not left without water access overnight.

Permitting and code: what BC requires

Any plumbing or floor change tied to a curbless conversion almost always needs a permit in Metro Vancouver. The City of Vancouver requires a plumbing permit for installing or altering plumbing systems, and creating a curbless shower typically triggers both permitting and inspection, even when a fixture-only swap in a single-family home might be exempt.

Code requirements layer on top of the municipal permit:

  • Effective March 8, 2024, new commercial and public buildings in BC must meet updated accessibility requirements, including accessible clearances and adaptable units.
  • Accessible-ready showers must either comply with CSA/ASC B652 clearance clauses directly or be designed so they can be upgraded to that standard without major structural work later.
  • Institutional occupancies and adaptable-ready units often require curbless design by default, since retrofitting a curb out later means rebuilding the floor.

New commercial buildings and common spaces in BC have had to meet updated accessibility standards since March 8, 2024. That date matters for any strata or tenant improvement project planning shower replacements now.

Cost, timeline and budgeting for tenant improvements and multi-unit work

Curbless showers generally cost more upfront, driven by membrane materials, linear drains and the subfloor rebuild needed to achieve a level, sloped surface. Curbed showers cost less to install in an existing bathroom footprint because the wet zone stays contained and the surrounding floor does not need re-sloping.

Budgeting for either option in CAD should account for:

  • Waterproofing membrane and linear drain hardware, which run higher for curbless due to the larger wet-zone coverage.
  • Subfloor modification or rebuild, especially on slab buildings where drop-in drains require coring.
  • Tile complexity and labour hours, since curbless floors demand tighter slope tolerances than a curbed pan.
  • A contingency allowance for unknown substrate conditions, since older buildings frequently reveal moisture damage or out-of-level slabs once demolition starts.

Timelines stretch when a project waits on municipal plumbing inspection before the floor can close in, so building that inspection window into the schedule early avoids surprises for tenants and property managers alike.

How to choose for commercial projects and tenant improvements

The right choice depends less on preference and more on who uses the space, how it gets cleaned, and what the building’s insurance and bylaws require. A clear decision checklist keeps that evaluation consistent across multiple units or locations.

  1. Confirm the building type and occupancy class, since institutional and accessible-ready units often require curbless design under code.
  2. Identify the user profile: staff washroom, guest-facing hospitality space, or multi-family suite each carry different priorities.
  3. Ask who maintains the space day to day and whether their cleaning routine suits a flush floor or a contained curb.
  4. Check strata bylaws before altering plumbing in a multi-unit building, since strata alteration processes commonly require owner approval and assign renovation liability.
  5. Require bid details on membrane type, warranty length, inspection schedule and sequencing before signing a contract.

A bid that specifies the membrane brand, flood-test procedure and inspection milestones signals a contractor who has actually planned the wet-zone work, not just priced the tile.

Multigroup Contracting: how we plan, permit and deliver shower work in occupied commercial projects

We have delivered tenant improvements, retail and restaurant buildouts, and multi-family renovations in the region for several years. Our bids set a fixed scope, schedule milestones, permit coordination and an inspection plan before work starts, so property managers know exactly when plumbing rough-in, membrane work and tile install happen relative to building access.

We handle the municipal permit applications, sequence trades around occupied floors, and build contingency into the schedule for substrate surprises rather than discovering them mid-project.

Impact on project workflow and coordination with other trades during installation

Shower work rarely happens in isolation inside a commercial renovation. Plumbing, tiling, electrical and sometimes HVAC trades all touch the same small footprint within days of each other, and a curbless design tightens that sequencing because the membrane has to be continuous before any other trade closes in the floor.

On a typical tenant improvement, the plumber roughs in supply and drain lines first, confirming the drain sits exactly where the slope plan calls for it. The waterproofing crew then needs uninterrupted access to install the membrane across the full wet zone, which means electrical rough-in for any heated flooring or exhaust fan wiring has to finish beforehand, not after. Tile setters cannot start until the membrane passes a flood test, and that test itself needs to sit on the schedule as a hard milestone, not a soft checkpoint.

Trade sequence from rough-in to tile installation

In occupied buildings, this sequencing gets layered on top of building hours, elevator booking windows and noise restrictions that property management sets for the project. A missed step, like closing in a floor before the plumbing inspection, can force a trade to come back and tear out finished work, which costs far more than the delay of waiting a day for a sign-off. We schedule inspection points as fixed milestones in the project plan, with trades briefed on what has to be complete before the next crew arrives, so a retail buildout or suite turnover moves through plumbing, waterproofing and finishing without rework. Coordinating that sequence well is often the difference between a shower installation that finishes on schedule and one that drags because two trades needed the same space on the same day.

Case studies or examples of commercial projects in Metro Vancouver using curbless vs curb showers

Commercial and multi-family projects across Metro Vancouver show both approaches in active use, and the choice usually tracks the building’s occupancy and tenant mix rather than a single industry default. Accessible-ready multi-family suites and assisted living facilities tend toward curbless entries to meet adaptable-ready clearances from the start, since retrofitting a curb out later means rebuilding the bathroom floor. Hospitality projects, including hotel guest rooms and some restaurant staff facilities, often choose curbless for the same reason, paired with the guest experience a flush, modern shower entry provides.

Warehouse and industrial renovations with employee washroom facilities more often keep a curbed design, since the priority there is straightforward containment and durability under heavy daily use rather than accessible clearances for every stall. Strata common-area renovations, such as upgrading a shared amenity room shower, frequently involve a strata council weighing the added waterproofing cost of curbless against the simpler retrofit of a curbed pan, with the building’s age and slab condition often tipping the decision.

Municipal permit records for shower and plumbing changes in Vancouver multi-unit buildings confirm that completed inspections and final approvals are a normal part of this work, whichever design a project chooses. What varies case by case is less the design itself and more how early the structural and drainage conditions get assessed, since that assessment determines whether a curbless conversion fits the existing slab without a costly rebuild.

Implications for insurance and liability in commercial properties

Insurance and liability exposure in a commercial property often comes down to how well the shower installation was waterproofed and documented, not which design was chosen. A failed membrane that lets water migrate into adjacent units or common areas can trigger a claim against the building owner, the strata corporation or the contractor, depending on who specified and installed the work.

In strata buildings specifically, alteration bylaws commonly require owners to obtain approval before changing plumbing or flooring in a unit, and those same bylaws often assign the owner responsibility for costs and liability arising from the alteration. That makes documentation, permit records and a clear waterproofing warranty part of the risk picture, not just a construction detail. A property manager who can produce permit approvals, inspection sign-offs and a membrane warranty has a much stronger position if a leak dispute ever arises, whether it involves a tenant, an insurer or a strata council.

Commercial property insurers generally expect permitted, inspected work behind any claim involving water damage, so skipping the plumbing permit on a curbless conversion to save time can leave a building owner without coverage exactly when they need it most. Building that permit and inspection trail into every shower project, curbless or curbed, is the simplest way to keep liability contained to the work itself rather than spreading into a coverage dispute.

Shower design touches energy use mainly through water heating demand and, in some buildings, through floor heating installed alongside a curbless conversion. A curbless shower with a linear drain and a larger sloped floor area sometimes gets paired with electric floor heating for guest comfort, which adds a modest ongoing electrical load compared to a curbed shower with no heated floor.

Water efficiency comes down to fixture selection more than entry design: low-flow shower heads and aerated fixtures cut hot water demand regardless of whether the shower is curbless or curbed, and that choice matters more for a building’s utility costs than the threshold detail. Where sustainability does connect to the curbless versus curbed decision is in material durability. A well-executed waterproofing membrane and correctly sloped substrate extend the life of the finished surfaces, which means fewer tear-outs and less construction waste over the building’s life cycle compared to a shower that fails early and needs a full rebuild.

For multi-family and hospitality projects aiming for lower operating costs, the practical sustainability lever is specifying durable, properly installed materials up front rather than choosing a particular shower design for its efficiency profile. A curbless shower built with a continuous membrane and quality tile can last as long as a well-built curbed shower, and either one built with shortcuts will cost more in repairs and waste down the line than it saved during construction.

Author perspective: contractor-first view on risk and value

Most of the curbless versus curb debate online treats this as an aesthetic choice. In commercial and multi-family work, it is really a risk decision: a curbless shower only pays off if the waterproofing is done right the first time, because fixing a failed membrane later means tearing out finished floors. We weigh accessibility requirements, budget and who maintains the space daily before recommending either option, and we would rather spec a well-built curbed shower than a curbless one installed without the right membrane and slope detail.

— MultigroupTeam

How we can help with your tenant improvement, retail or multi-family shower project

Whether your project is a staff washroom in a coffee shop buildout, an accessible unit in a multi-family renovation, or a shared facility in a retail or office tenant improvement, we scope, permit and sequence the shower work as part of the whole project, not as an isolated line item.

Multigroup

Our bids set out fixed scope, a membrane and waterproofing plan, inspection milestones and a realistic schedule before you sign anything, so you know what you are committing to and when each trade is on site. We deliver this work through our commercial renovation and tenant improvement services across Metro Vancouver, inside occupied buildings where tenant access and building hours matter as much as the construction itself. If you are planning a shower replacement or a broader bathroom upgrade as part of a renovation, contact us for a permit-ready bid and a preconstruction budget scoped to your building.

FAQ

What are the pros and cons of a curbless shower?

A curbless shower gives step-free access for wheelchairs, walkers and aging users, which suits accessible-ready and hospitality projects well. The trade-off is higher waterproofing demands, since the entire bathroom floor becomes the wet zone and needs a continuous membrane to avoid the premature failures common in poorly waterproofed barrier-free renovations.

Is it more expensive to do a curbless shower?

Curbless showers typically cost more to install than curbed ones in an existing bathroom, mainly due to the larger waterproofing membrane, linear drain hardware and subfloor rebuild needed to achieve a level, sloped surface. Curbed showers keep costs lower because the wet zone stays contained within the pan and the surrounding floor does not need re-sloping.

Should a shower curb be sloped?

Yes, the floor inside a curbed shower pan slopes toward the drain, typically around a quarter inch per foot, while the curb itself contains that sloped area so the rest of the bathroom floor stays flat. This containment is what lets curbed showers skip the whole-room waterproofing a curbless design requires.

Should I tile the shower curb or walls first?

Contractors generally complete waterproofing across the curb, floor and walls as one continuous membrane before any tile goes on, then tile the walls before the floor or curb to keep grout lines clean at the transitions. The exact sequence depends on the drain type and tile pattern, which is why a detailed installation sequence in a contractor’s bid matters.

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