
Too Many Decisions? We Help You Make the Right Choices.
Planning a bathroom renovation involves dozens of details. Missing key structural or trade requirements early often leads to costly variations later.
At DEMK Constructions, we help you keep your build practical and on budget:
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Layout & Plumbing: Assessing existing pipe locations to avoid unnecessary structural costs.
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Smart Materials: Selecting durable, low-maintenance tiles and finishes within your budget.
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Compliance & Ventilation: Guaranteeing Australian standard waterproofing and proper airflow.
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Practical Design: Finding the right balance between walk-in showers, bathtubs, and storage.
As registered builders with an engineering background, we evaluate the technical and financial impact of every choice — ensuring a seamless, functional build.
Our Projects
Bathroom renovations we’ve completed
DEMK Approach
Why you will love
working with DEMK
Experienced & Skilled Team
Our experienced team works in a well-organised and coordinated way throughout your renovation. We focus on attention to detail at every key stage to achieve a high-quality finish.
Transparent Budget
We provide a clear scope, inclusions and allowances so you understand where your budget is going. Your project is carefully planned and managed from start to finish.
Open Communication
We keep you informed throughout your renovation with clear and responsive communication. Questions or concerns are addressed promptly as the project progresses.
After Service Support
Our support continues after your renovation is complete. If an issue arises after handover, our team is here to help.
Love my new bathroom. Nino and his crew have done a wonderful job. Nino's help with cabinets, taps etc. was very much appreciated. As a newcomer to unit living Sage's legal and Body Corporate information was also a big help. The fellows were professional and amiable and worked non-stop.
A pleasure to have around. Thank you all so much. I would highly recommend DEMK Constructions to anyone wishing to improve their home.
What Our Clients Say
DENISE, ST KILDA
Google Review


From Essential to
High-End Finishes
Every bathroom renovation starts with the same essential foundations — quality construction, compliant waterproofing, plumbing and professional installation.
From there, the level of finish can be tailored to your budget and preferences, from practical and well-designed family bathrooms through to luxury and high-end renovations.
Tile selections, premium fixtures, custom joinery, feature lighting, niches, stone surfaces and other design details can be incorporated depending on the look, functionality and level of finish you want to achieve.
Bathroom Renovation Cost in Melbourne
Every bathroom is different, and the final cost will depend on the size, existing condition, layout, fixtures, materials and level of finish you choose.
At DEMK Constructions, a full bathroom renovation mid-range typically starts from around $25,000, with costs increasing for larger bathrooms, layout changes, custom joinery and premium finishes.
We also recommend allowing around 10% contingency in your renovation budget. Once demolition begins, hidden issues such as water damage, deteriorated substrates or unexpected plumbing work may become visible.
For transparency, our quotations clearly outline the scope of works, inclusions, pricing and allowances. Where allowances apply, the final cost may vary depending on the fixtures, fittings, tiles and finishes you select.
For family homes, a typical full renovation may include a complete strip-out, compliant waterproofing, floor-to-ceiling tiling and upgraded vanities.
What Influences the Cost?
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Layout & Plumbing
Keeping the existing layout can reduce complexity, while relocating showers, toilets or vanities may require additional plumbing and construction work.
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Tiles, Fixtures & Finishes
Tile selection, tapware, shower screens, baths and other fixtures can significantly change the overall cost.
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Custom Joinery & Details
Custom vanities, storage, niches, feature lighting and other bespoke details add functionality and character but also affect the budget.
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Existing Conditions
Water damage, structural issues or other problems discovered after demolition may require additional work.
Know What You're Paying For
Our proposals clearly outline the scope of works, inclusions, exclusions and allowances, helping you understand where your renovation budget is going.

Before, Thornbury Bathroom Project

After, Thornbury Bathroom Rebuild

Before, Armadale Bathroom Project
After, Armadale Bathroom Rebuild

Smart ways to manage your bathroom renovation on budget.
A few practical decisions early in the planning stage can help keep your bathroom renovation costs under control without compromising on quality.
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Keep the existing plumbing layout
Where possible, keeping your toilet, shower and vanity in their existing positions can reduce additional plumbing and construction costs.
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Choose where to invest
Prioritise waterproofing, plumbing and quality workmanship, then adjust your fixture, tile and finish selections to suit your budget.
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Make selections early
Choosing your tiles, fixtures and fittings before construction begins helps minimise unexpected costs, variations and delays.
Our Process
We manage your bathroom renovation from planning through to handover.
1. Consultation & Site Assessment
We visit your home, understand your goals, assess the existing bathroom and discuss your lifestyle, priorities and budget.
We'll discuss
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Your renovation goals
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Budget expectations
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Layout possibilities
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Timeline
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Design direction
3. Planning & Ordering
Once your selections are approved, we prepare everything before demolition starts.
This includes:
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Ordering materials
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Confirming lead times
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Scheduling deliveries
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Coordinating trades
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Preparing the construction program
2. Proposal, Design & Selections
This is where the key decisions are made. Before construction begins, we help you finalise your layout, materials, fixtures and finishes so everything can be priced, ordered and coordinated in advance.
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Scope of Works & Proposal
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Design Plan & Layout
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Materials, Fixtures & Finishes
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Allowances & Selections
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Inclusions & Exclusions
4. Construction Begins
Only once everything has been planned do we begin construction. Key stages included but not limited to:
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Demolition
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Plumbing & electrical rough-in
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Waterproofing
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Tiling
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Cabinetry & fixtures
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Final fit-off
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Quality inspection, General clean
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Handover
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After Service Support
Bathroom Renovation Timeline
A full bathroom renovation typically takes around 4–8 weeks, depending on the size of the bathroom, scope of works, product availability and site conditions.
Many projects are completed sooner, but we allow a realistic timeframe to account for unexpected issues that may only become visible after demolition, as well as variations, inspections or material delays.


Accessible Bathroom Renovations for Elderly
A safe and accessible bathroom can make everyday routines easier and support greater independence at home. DEMK Constructions provides accessible bathroom renovations across Melbourne, with layouts and features tailored to individual mobility needs and the existing home.
Whether you are planning for changing mobility, supporting an elderly family member or modifying a bathroom for a person with disability, we can help create a practical, comfortable and easy-to-use space.
A well-planned bathroom can also help older homeowners remain comfortable and independent at home for longer. Features such as easier shower access, slip-resistant flooring and strategically positioned supports can reduce everyday obstacles and improve day-to-day safety.
We consider both current and future needs when planning the space, helping create a bathroom that remains practical as mobility requirements change.
NDIS Bathroom Renovations & Home Modifications
Choose a registered NDIS builder with experience in accessible bathroom modifications. DEMK Constructions provides NDIS-funded bathroom renovation and home modification works across Melbourne, delivering practical, compliant and accessible solutions based on the approved project scope.
For NDIS-funded bathroom modifications, an Occupational Therapist may assess the participant’s functional needs and recommend suitable changes. Depending on the project and funding pathway, supporting documentation and approval may be required before construction begins.
Once the scope is approved, DEMK Constructions can complete the required building works, including step-free showers, grab rails, slip-resistant flooring, accessible toilets and other modifications designed to improve safety and independence at home.
Planning an Accessible Bathroom Renovation in Melbourne?

Heritage Bathroom Renovations
Renovating a bathroom in an older or heritage home often requires a different approach. Existing structures, original features and the character of the property all need to be considered alongside modern waterproofing, plumbing and functionality.
Frequently asked questions about bathroom renovations
Bathroom Renovation Areas We Serve
DEMK Constructions works across Melbourne, delivering custom homes, knockdown rebuilds, major renovations, extensions and multi-unit developments.
Based in Coburg, we regularly work throughout Melbourne’s inner north, west, east and south-east, with a strong focus on established suburbs where thoughtful design, structural planning and quality construction matter.
Bayside & Inner South
Brighton, Hampton, Sandringham, Elwood, St Kilda, Bentleigh, Cheltenham
Inner north
Brunswick, Coburg, Fitzroy, Carlton, Collingwood, Northcote and surrounding suburbs.
Inner west
Essendon, Moonee Ponds, Footscray, Yarraville and surrounding suburbs.

Inner east and south-east
Richmond, Kew, Camberwell, Balwyn, Glen Iris, Malvern, Prahran, St Kilda, Doncaster and surrounding suburbs.
We also consider projects outside these areas where the scope is a good fit for DEMK.
Planning a project in Melbourne?
Talk to our team about your site, plans and next steps.


















