Comparison
Modern Vanity vs Costco — Quartz vs Cultured Marble Vanities
Costco sells bathroom vanities at competitive prices, primarily from brands like OVE and Avanity. They look like great deals — until you check the countertop material. Almost every Costco vanity under $900 uses cultured marble or polymarble, not quartz.
Last updated: April 2026. All prices in Canadian dollars.
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| Feature | Modern Vanity | Costco | Edge |
|---|---|---|---|
| Countertop Material | Engineered quartz (all models) | Cultured marble / polymarble (scratches, yellows over time) | |
| 36" Price | $749 (complete set with quartz) | $600-$900 (with cultured marble — not quartz) | |
| Backsplash | Included (matching quartz) | Not included on most models | |
| Cabinet Ships | Fully assembled | Varies — some require assembly | |
| Selection | 33 products, 3 colours (all include quartz) | 15-25 models (seasonal rotation, mostly cultured marble) | |
| Membership Required | No | Yes — Costco membership ($65+/year) | |
| Delivery | Local GTA, free pickup | Free shipping (Costco.ca) | |
| Return Policy | Final sale (damage claims with photos) | Costco's generous return policy |
✓ Choose Modern Vanity If…
Buyers who want a genuine quartz countertop — not cultured marble that scratches and yellows. For $749, you get a material that Costco doesn't even offer at that price point.
When Costco might make sense:
Existing Costco members who don't mind cultured marble, want the security of Costco's return policy, or prefer the convenience of one-stop shopping.
Our Verdict
This comes down to one question: do you want quartz or cultured marble? Costco's vanities at the $600-$900 range almost always use cultured marble or polymarble — which looks acceptable new but scratches easily, yellows with UV exposure, and lacks the premium look and durability of quartz. Modern Vanity's quartz countertop at $749 is a genuine material upgrade that you'll appreciate every day. The $50-$150 difference is the best bathroom upgrade money can buy.
Frequently Asked Questions
What's the difference between quartz and cultured marble?
Quartz is engineered stone — extremely hard, scratch-resistant, non-porous, and maintains its appearance for decades. Cultured marble is a resin-based material that's lighter and cheaper to produce, but scratches visibly, stains more easily, and can yellow with UV exposure over time. It's the difference between a premium countertop and a budget one.
Do Costco vanities come with a backsplash?
Most Costco vanity models do not include a backsplash. Modern Vanity includes a matching quartz backsplash with every set — it's one of many things that's included in our price but extra everywhere else.
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