One point of contact. From first conversation to handover.
The Antonsen Design & Build service exists because a great bathroom requires more than great fittings. It requires an architect who understands bathing as ritual, a construction team who respects the materials, and a single person who holds the whole project together. Hiljaisuudessa on rauha.
From your first conversation with us to the day we hand over the keys, you deal with one person. They know your project, your brief, and your preferences. They are accountable for everything.
Our approach
Architect first, price second
We don't price a project until our architect has fully understood it. You meet with our architect, explore the design possibilities together, and only then receive a detailed, fixed-price construction budget. No guesswork. No surprises.
Our materials
Hinoki and Rauta throughout
Every Design & Build project is specified entirely from the Antonsen range — Hinoki timber and Rauta metal, combined as the brief demands. The materials are ours. The quality is guaranteed.
"A bathroom should be the most considered room in a home. We treat it that way."
Antonsen Design & Build — Hiljaisuudessa on rauha
1
Architect. One project lead. One point of contact throughout.
Fixed
Price. Every construction budget is detailed and fixed before work begins.
10yr
Full guarantee on all Antonsen products specified in your project.
0
Third-party suppliers. All materials come from the Antonsen range.
What we design & build
Bathroom spaces, designed completely
The Antonsen Design & Build service focuses entirely on bathroom spaces — because that is where our expertise, our materials, and our philosophy converge. We offer the finest bathroom design and construction service available, delivered completely and without compromise.
Master bathrooms
Full architectural design and construction of primary bathroom spaces — from structural layout to final installation of every Hinoki and Rauta fitting.
Typically includes
Architectural drawings and structural plans
Full waterproofing and tiling
Hinoki vanity, bath surround, and shelving
Complete Rauta tapware and shower specification
Lighting design and electrical
Wet rooms & shower rooms
Architectural wet rooms and dedicated shower spaces — designed for maximum material expression and complete waterproofing integrity.
Typically includes
Full wet room waterproofing system
Linear drain and waste specification
Rauta shower system — rain head, hand shower, thermostatic valve
Hinoki shower seating and accessories
Spa & wellness bathrooms
Elevated residential spa spaces — designed around the Finnish sauna and Japanese onsen philosophy of bathing as ritual and restoration.
Typically includes
Freestanding bath specification and installation
Hinoki bath surround, caddy, and onsen stool
Rauta bath filler and overflow in bespoke finish
Steam shower or sauna integration
The process
Architect first. Price second. Build third.
We believe that great design cannot be rushed into a budget. So we don't. Our process begins with your architect — a dedicated Antonsen design professional who takes time to understand your space, your life, and what the bathroom could become. Only once that design is complete do we prepare your fixed-price construction budget.
Why we work this way
The architect consultation is free
Your initial meeting with our architect carries no charge and no obligation. We do this because we believe you should understand the full possibility of your space before you decide whether to proceed. A great design is worth seeing, even if the timing isn't right. Hiljaisuudessa on rauha.
Step 01
Initial enquiry
You contact us — by form, showroom visit, or phone. We learn about your project and confirm that Design & Build is the right service for you.
No charge · No obligation
Step 02
Architect meeting
You meet with your Antonsen architect — in our showroom or on site. They listen, ask questions, and begin to form a design response to your brief.
Free consultation · 90 minutes
Step 03
Design proposal
Your architect presents a full design proposal — drawings, material selections from the Hinoki and Rauta ranges, and a written design rationale.
Delivered within 10 business days
Step 04
Fixed-price budget
Once the design is approved, we prepare a detailed, itemised construction budget. Every line is fixed. No estimates, no provisional sums, no surprises at handover.
Fixed price · Full specification
Step 05
Construction
Your project enters our construction schedule. Your single point of contact manages every trade, every delivery, and every decision. Weekly progress updates.
Weekly updates · One contact
Step 06
Handover
A formal handover inspection with your project lead. Every fitting checked, every surface reviewed. You receive your 10-year Antonsen product guarantee documentation.
10-year guarantee · Formal handover
Materials
Everything from the Antonsen range
Every Design & Build project is specified entirely from our own Hinoki and Rauta ranges — no third-party products, no compromises on quality or aesthetic consistency. When everything in a bathroom comes from one maker, the result has a coherence that cannot be achieved any other way.
Hinoki series
ヒノキ / 檜 — timber
Bath panels, vanity cabinetry, shelving, onsen stools, bath caddies, towel hooks and rings — all timber, all handcrafted, all made to order in your chosen species and finish.
Rauta series
rauta — iron, metal
Basin taps, shower systems, bath fillers, heated towel rails, drain covers, accessories and hardware — all solid metal, all specified in your chosen finish from brushed brass to living copper.
10
Year full product guarantee
Every Antonsen product specified in your Design & Build project carries our 10-year full guarantee — covering materials, manufacture, and finish.
Structural integrity of all Hinoki timber products
Mechanical performance of all Rauta tapware and fittings
PVD and hand-applied finishes on all Rauta products
Timber joinery and finish on all Hinoki cabinetry
Waterproofing systems installed by Antonsen
The copper living finish is the sole exception — guaranteed structurally and mechanically, but its natural patina is by design, not defect. Hiljainen vesi.
Start a project
Tell us about your bathroom
The first step is a conversation. Tell us about your project — the space, what it is now, and what you'd like it to become. Your initial architect consultation is free, private, and carries no obligation. We begin with listening. Hiljaisuudessa on rauha.
We respond to all Design & Build enquiries within 48 hours. Your information is held privately by Claramont Acquisition Group Pty Ltd ACN 681 649 105.