Oscar 20.1
Flexible studio with kitchenette and ensuite
Works as a home office, studio, guest room, or self-contained retreat. Compact enough to fit behind most homes, including smaller sites. Fully customisable and delivered ready to assemble.
Boxed Buildings Oscar 20.1
At just over 20 sqm, Oscar 20.1 Charlie includes an open studio space that can adjust to a wide range of uses, a kitchenette, and a small ensuite/powder room that meets the liveable home accessibility requirements. Measuring only 5.07 x 4.05m, Oscar 20.1 will easily fit behind many existing homes, including smaller sites.
The design is fully customisable, and comes delivered ready to assemble.
Oscar 20.1 is classified as a Small Secondary Dwelling, therefore generally only requires a building permit to commence construction.
Starting from just $70,000 inc GST and an estimated assembly time of 3-4 weeks after delivery, where else can you add so much extra space with so little disruption to your existing home?
SIP construction
Boxed Buildings are built from Structural Insulated Panels (SIPs). The panels arrive ready to assemble, with insulation already built in, which means the building goes up in roughly half the time of a conventional build.
The walls are also airtight in a way that standard timber framing rarely achieves, so the finished space stays warm in winter and cool in summer whilst significantly reducing the need to operate power hungry heating and cooling systems.
Interior colour schemes
Choose your colour scheme, or bring your own.
RD Building Design has teamed up with interior designer Sharon Lynch to develop a range of interior styling options.
- Bronze coastal
- Bronze contemporary
- Bronze modern 1
- Bronze modern 2
Ready to see what Oscar 20.1 could do for your block?
Most homeowners are sitting on more potential than they realise, and Oscar 20.1 is one of the most straightforward ways to act on it.
Get in touch and we will walk you through what fits on your property, what the permit requirements look like, and what the whole process involves from feasibility and design to finished build.
Oscar 20.1
Inclusions (VIC)
- Footings
Hot-dip galv footings and supports. Supplied by Surefoot. Designed and manufactured in Melbourne, VIC
- Subfloor Supports (Bearers)
MGP10 90 x 45.
Australian sourced H3 treated pine- Floor
165mm SIPs panels
- Walls
115mm SIPs panel
- Structural Framing (Plates/Jambs/Lintels)
MGP10 90 x 45.
Australian sourced H2 treated pine- Roof
100mm SIPs panels
- Fascias/Barges
Colorbond steel
- Windows
Double-glazed as a minimum
- Door - External
Hume Duracoat 920 x 2040
- Doors - Internal
Hume Flush 920 x 2040
- Gutters/Gutter Clips
Icon PVC. Designed and manufactured in Australia
- Downpipes
Holman 100mm PVC. Designed and manufactured in Australia
- Weatherboard Cladding
Duraplank 230mm wide fibrecement boards. Designed and manufactured in Australia
- Plinthboards
Rough sawn 150 x 25mm. Australian sourced H3 treated pine
- Internal Flooring
Gerfloor Senso vinyl sheeting
- Toilet
Estilo close-coupled rimless S-trap
- Vanity
Estilo 400mm vanity with cupboard
- Mirror Cabinet
Estilo 570mm wide cabinet with adjustable shelf
- Hot Water
Rinnai Hotflo 50L electric hot water heater
- Kitchen Joinery
Kaboodle Classic or Everyday
- Kitchen Sink
Estilo single bowl with drainer
- Kitchen Splashback
Bellessi 575mm x 4mm polymer splashback
- Electrical
Switchboard, Clipsal 13 x double power outlets, 7 x double LED batten lights, 5 x Clipsal lightswitches
- Painting - External
Taubmans Sunproof low sheen
- Painting - External (Door)
Taubmans Sunproof gloss
- Painting - Internal (Bathroom)
Taubmans Easycoat semi gloss
- Painting - Internal
Dulux 'Light Texture'
- Ramp/Deck
MGP10. Australian sourced H3 treated pine
- Miscellaneous
All required
Oscar 20.1
Construction
- Delivered
From just $70,000 inc GST
- Assembly
-
Estimated $45,000
Plumbing
- Trenches for connection to existing sewer and stormwater
- Laying of sewer and stormwater services
- Rough-in and fit-off of external and internal plumbing services
- Compliance certificates
Electrical
- Connection of electrical services
- Rough-in and fit-off of external and internal electrical services
- Compliance certificates
Waterproofing
- Compliance certificates
Builder
- Installation of Surefoot footings
- Assembly of SIPs panels and roof
- Installation of windows, doors, joinery
- Installation of vapour barrier, cladding
- Assembly of deck and ramp
Miscellaneous (by builder or others)
- Laying of floor vinyl
- Painting etc
Boxed Buildings. Benefits compared to traditional builds
A conventional backyard build means weeks of site work, weather delays, and trades coming and going for months. A Boxed Building sidesteps most of that. The kit is manufactured off-site, so assembly is fast. Build time runs at roughly half that of a comparable conventional structure, with less site disruption and far less waste.
Is a major site cut/excavation required?
Is a major site cut/excavation required?
NoIf utilising Surefoot footings
Is a major site cut/excavation required?
YesFor concrete slabs
Stump hole excavation required?
Stump hole excavation required?
NoIf utilising Surefoot footings
Stump hole excavation required?
YesFor concrete slabs and pad footings
Choice of footing? (Stumps or concrete slab)
Choice of footing? (Stumps or concrete slab)
YesOur designs are flexible. (Costs for concrete slabs are applicable)
Choice of footing? (Stumps or concrete slab)
SometimesMany volume builders only build with concrete slabs
How many deliveries are made to the site?
How many deliveries are made to the site?
OneEverything required for assembly is delivered once (larger projects may require additional deliveries)
How many deliveries are made to the site?
ManyMultiple deliveries are made throughout the build process causing delays
Can I owner build?
Can I owner build?
YesOur projects are designed for simple assembly with all above ground parts supplied
Can I owner build?
YesTraditional builds can be more difficult to coordinate
Do I need to straighten walls after installation?
Do I need to straighten walls after installation?
NoWalls and roof are precision engineered and do not need straightening
Do I need to straighten walls after installation?
YesFrame built systems need to be straightened before plastering
Do I need internal plasterboard in dry areas?
Do I need internal plasterboard in dry areas?
NoThe walls and roof do not need plasterboard. They can be left raw
Do I need internal plasterboard in dry areas?
YesFrame built systems all need plastering and painting which increases costs
Is a building permit required?
Is a building permit required?
YesA building permit is required for all permanent structures
Is a building permit required?
YesA building permit is required for all permanent structures
Other Boxed Buildings designs
Boxed Buildings are designed for homeowners who want to add real, liveable space to their property without the cost and complexity of a full renovation. Depending on the design you choose, that could mean a backyard office, a self-contained studio, or extra bedrooms for a growing family.
Alpha 26.1
Open-plan studio, featuring a spacious ensuite, and kitchenette
Bravo 57.1
2-bedroom small home perfect for additional space, guests, extra income, holiday home
Charlie 60.1
One queen size bedroom, 2 single bedrooms
Tango 526
Townhouse design for long narrow sites
About Boxed Buildings
Learn more about our modular SIP construction method
Which design suits your site?
The right modular building comes down to your block, your budget, and what you want the space to become.
Get in touch and we'll work through design configurations, site requirements, the permit pathway, and what it realistically costs to get a quality secondary building onto your Melbourne property.