Bathroom planning guide

Bathroom Renovation Planning: Decisions to Make Before Demolition

The most important bathroom decisions happen before the tiles are installed. Plan the layout, services and performance details together from the start.

Contemporary bathroom with neutral tiles, vanity and shower

Key takeaways

What to know before you begin.

  • Check real fixture dimensions before finalising the layout.
  • Coordinate waterproofing, falls, niches and floor wastes as one system.
  • Plan ventilation, lighting and power before walls and ceilings close.
  • Confirm storage and cleaning access—not only the visual style.
01

Test the layout with real dimensions

A plan can look generous until door swings, shower screens, vanity drawers and towel locations are added. Use the dimensions of shortlisted fixtures and allow comfortable circulation around them.

For smaller bathrooms, consider whether the door position, shower form, vanity depth or storage arrangement can improve daily use without unnecessary service relocation.

02

Coordinate water management early

Substrate preparation, falls, floor wastes, shower details, niches and waterproofing need to work as one system. Their relationship affects tile set-out, thresholds and the finished floor level.

Ask how the waterproofing scope will be documented and what records will be provided at handover.

03

Plan ventilation and moisture control

A bathroom fan is most effective when its capacity, location, duct route and air path suit the room. Windows alone may not provide consistent moisture control during Melbourne winters.

Ventilation decisions should be coordinated with lighting, ceiling framing and external discharge requirements before construction closes the space.

04

Select fixtures as a coordinated set

Tapware, basins, toilets, baths and showers have different plumbing and installation requirements. Confirm compatibility, lead times, finishes and who supplies each item.

  • Check in-wall and concealed components
  • Confirm tapware projection and basin reach
  • Review shower screen clearances
  • Allow access for cleaning and future maintenance
05

Design lighting and storage for real routines

General light, mirror light and softer evening light serve different purposes. Power outlets, heated towel rails and under-cabinet lighting also need early coordination.

Vanity drawers, mirrored cabinets, shower niches and linen storage should be planned around the items your household actually uses, not treated as decorative afterthoughts.

Important: This guide provides general information for Melbourne homeowners. Every property, scope and site condition is different. A site inspection and documented proposal are required before relying on project-specific cost, timing or construction advice.

Common questions

Clear answers for better planning.

What should I choose first for a bathroom renovation?+

Begin with the room layout and major fixture dimensions. Vanity, shower, bath and toilet positions affect circulation, services, waterproofing and the amount of usable storage.

Why is bathroom ventilation important?+

Effective ventilation helps manage moisture and protect finishes. The fan, duct path, make-up air and switching approach should be considered during planning rather than added after tiling.

Can bathroom plumbing stay in the same position?+

Keeping services near existing positions may reduce complexity, but it should not preserve an impractical layout without review. A site inspection helps balance function, construction requirements and budget.

What waterproofing documentation should I receive?+

Documentation depends on the agreed scope and applicable requirements. Ask the builder to explain the waterproofing system, responsible trade, inspection process and handover records before work begins.

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