It’s time to upgrade your bathroom renovation experience. Get expert advice from Sydney’s leading bathroom specialists, and turn your space into something modern, functional, and built to last.
✨ Explore design ideas with a renovation expert
💡 Get practical tips on maximizing space & style
📌 Review custom solutions at different price points
📄 Receive a no-obligation, transparent quote
Every home is unique, and so is every bathroom renovation we complete. See how we've transformed small bathrooms, ensuites, and full-scale renovations across Sydney, creating stylish and functional spaces that match our clients' needs. Explore our past projects and get inspired for your own.
Choosing the right bathroom renovation package is easy with our expert guidance. At Kastell we have bathroom packages to suit all budgets and we will work closely with you to fit all of your renovation needs.
Includes:
✅ Preliminaries including HBCF policy
✅ Demolition & rubbish removal
✅ Liquid floor levelling
✅ Plumbing & electrical at same points
✅ Aquachek lining - walls & ceiling
✅ Tile supply at $30/m2
✅ Wall tiling to shower only
✅ Chrome tapware and accessories
✅ Wall hung vanity valued to $1,000
✅ Waterproofing 10yr warranty
✅ Caroma wall faced toilet
✅ Semi-frameless shower screen
✅ Painting to ceiling and walls
Includes everything in Premium PLUS:
✅ 3D drawings with elevations
✅ Plumbing & electrical moved
✅ Tile supply at $50/m2
✅ Ceiling height wall tiling
✅ Feature tile in shower niche
✅ ABI tapware & accessories
✅ Vanity up to $1,500
✅ Mirror cab up to $750
✅ Caroma in-wall toilet
✅ LED strip to niche & vanity
✅ Standard linear drains
✅ Slot diffuser exhaust fan
✅ Acrylic freestanding bath
Includes everything in Luxury PLUS:
✅ Design consult appointments
✅ Tile supply at $80/m2
✅ Two feature tiles included
✅ Tiling to all walls (ceiling height)
✅ Feature tile to wall & niche
✅ Brodware tapware & accessories
✅ Vanity up to $2,500
✅ Starphire frameless shower
✅ Ceiling set grill fan
✅ Underfloor heating
✅ Custom linear tile drain
✅ Porcelain freestanding bath
As licensed builders, we offer full HBCF home warranty insurance, a 10-year waterproofing warranty, and $20M public liability cover - your project is protected from every angle.
No lump sums, no grey areas. Our quotes break down exactly what you’re paying for - so you can cut, upgrade, or swap with full visibility.
You’ll get full access to your project’s live schedule, updates, and photos - so you’re never chasing us for answers. Our systems are built to keep you in control.
We go beyond bare-minimum compliance. From waterproofing to fall gradients, we build to exceed NCC standards so you don’t end up fixing leaks, mould, or drainage issues later.
We’ll guide you through selections with real-world advice - helping you choose fittings that won’t date, break, or blow out your budget.
We leave your home liveable during the build - with daily site cleans, dust control measures, and respectful tradies who treat your space like their own.
We collaborate with you on layout, fixtures and finishes to find a design that suits your space, style and budget.
Once the design is locked in, we provide a detailed, fixed-price contract. It outlines inclusions, exclusions, timelines, and trade schedules.
Before work begins, we protect surrounding areas and prep the site for safe demolition. Preparing your space for demo.
This is where it all comes to life. We handle all trades in-house or with trusted partners - plumbing, electrical, waterproofing, tiling, cabinetry and install.
We walk you through your new bathroom and check off every detail together. You’ll receive warranty info & care instructions.
Your dream bathroom starts with inspiration. Browse our handpicked Pinterest boards filled with ideas for small bathrooms, modern ensuites, and timeless designs. Find the perfect tiles, vanities, and layouts to bring your vision to life.
Not sure how much your bathroom renovation will cost? Request a free quote today and get a clear breakdown of pricing based on your space, style, and materials. Our expert team ensures accurate estimates and no hidden fees so you can budget with confidence.
Planning a bathroom renovation? From budgeting and timelines to design tips and approvals, we answer the most frequently asked questions. Get the information you need to make smart decisions and create a bathroom that’s functional, stylish, and built to last.
In Sydney, most bathroom renovations fall between $25,000 and $40,000. Factors like bathroom size, layout changes, tiling, and finish quality all impact cost. At Kastell, we provide fixed-price contracts with full cost transparency - no hidden extras. Read our 2025 bathroom renovation cost guide for real examples and expert tips.
A $10,000 budget may cover basic cosmetic updates — like new tapware, paint, or fittings — but a full renovation with waterproofing and tiling will typically exceed this. At Kastell, we help you make the most of your budget with smart material choices and clear priorities. See our budgeting and timelines advice for how to get maximum value.
A typical bathroom renovation takes 3 to 5 weeks in Sydney. Timeframes depend on design complexity, tile choices, lead times, and how many trades are needed. Kastell runs a streamlined schedule with proactive planning and tight communication to avoid delays. Read our blog article on how long bathrooms renovations take to find out more.
Unfortunately, no — once demolition starts, your bathroom will be fully out of action until the renovation is complete. At Kastell, we plan ahead to minimise disruption, help you organise temporary alternatives, and ensure the worksite stays clean and contained. See how we manage the renovation process from start to finish.
A bathroom renovation includes design, demolition, plumbing and electrical rough-in, waterproofing, tiling, fit-off, and final detailing. Kastell manages each stage in-house to ensure accountability and quality control. We also ensure compliance with NCC building standards for waterproofing, drainage, and ventilation. See our full process for what’s involved.
Space-saving layouts, wall-hung vanities, mirrored storage, and frameless shower screens are great for small bathrooms. Large-format tiles and light colour palettes can also make the space feel bigger. Kastell specialises in small bathroom renovations, with designs tailored to both function and flow. We can help you make the most of every inch.
Yes — a well-executed bathroom renovation adds real value, especially in competitive Sydney markets. Buyers and renters look for updated, functional bathrooms with smart storage and modern finishes. Kastell helps investors, downsizers, and families create spaces that stand out and perform long term.
Most bathroom renovations in Sydney don’t need council approval if you're not changing structural walls or plumbing locations. Kastell helps you confirm what approvals are required during our pre-project planning stage. For legal guidelines, visit NSW Fair Trading.
You can expect around 60–75% ROI from a well-executed bathroom renovation in Sydney. For investors and families alike, a functional, modern bathroom improves resale value, rental returns, and livability. Kastell focuses on practical layouts and timeless finishes that drive long-term returns. Explore our ROI approach.
DIY might seem cheaper, but poor waterproofing or structural mistakes can cost more to fix than doing it right the first time. A licensed builder like Kastell manages everything — from compliance to coordination — so your bathroom renovation is safe, legal, and built to last.
Yes. In NSW, any residential work over $5,000 must be done by a licensed builder. Kastell is fully licensed and insured, and provides HBCF home warranty insurance and waterproofing certification on all projects. This protects your home and ensures all work complies with state regulations and industry standards.
Look for licensed builders with fixed pricing, clear communication, and real bathroom renovation expertise. Kastell is known for its client-first approach, smart systems, and focus on long-term results — not quick fixes. Read about who we are and see our process to understand how we work differently.
Getting started is easy. Simply book a free consultation via our Contact page, and we’ll walk you through your options, budget range, and timeline. Kastell provides fixed-price quotes and tailored advice — no pressure, just honest, helpful planning.
We let our work speak for itself. From the first consultation to the final touches, we’re committed to making your bathroom renovation smooth, stress-free, and built to last. Read what our clients have to say about their renovation experience with Kastell Building Co.
"Cam and the team were super professional. The ensuite turned out even better than we imagined, and everything ran on time. Would definitely use them again."
“We’d been putting off our reno for years, but Kastell made it feel easy. The finishes are beautiful, and they kept us in the loop the whole way through.”
"We couldn’t have asked for a better experience. Cameron was friendly, professional, and kept us in the loop every step of the way. Our bathroom looks incredible now!"
Planning a bathroom renovation? Find out how much it will cost, how long it takes, and how to make the most of your space. Our expert guides cover everything from budgeting tips to smart design solutions so you can renovate with confidence.
Your essential guide for renovating in Sydney. Avoid costly mistakes and stress in your next renovation – Get our free guide now!
