House CC · Opus 55 · Design handbook

A mansion, folded into 92 m²

Two bedrooms, a borrowed-space study, two bathrooms, a 45 m² fireplace great room and a garage — under one roof line, on a lot that still keeps its front house.

House
91.18 m²
11.0 × 7.5 + 3.1 × 2.8
Garage
21 m² clear
3.5 × 6.0
Great room
up to 45 m²
fireplace · 2.7 m ceiling
Beds · baths
2 + study · 2
master suite
Plans
3
one fixed shell
Prefab
3 + 1
road-legal modules + pod

AI concept render from the measured 3D model — not a photograph of a built house.

01 · The idea

Keep the moves of a big house. Drop the square metres.

A large house feels large because of a handful of moves, not because of its floor area. We kept the moves and packed them into one fixed shell.

link
01
Arrive under cover

One low roof runs from the garage to the porch. Car to front door: 12.6 m, dry.

porch
02
A 1.2 m pivot door

Solid spotted gum in a timber-lined porch. The first thing you touch is the best thing we build.

03
One 45 m² great room

Living, dining and kitchen in one volume — the part of a mansion people actually use.

04
A fireplace wall

Stone, a linear flame, a desk at one end and a window seat at the other.

05
A hotel-style suite

Enter through the dressing room; the ensuite opens off it. Nothing opens straight onto the bed.

06
2.7 m everywhere

Full-height ceilings in every room, including the bathrooms and the lobby.

07
The garden is a room

A 3.6 m stacking door opens the great room to a 35 m² private garden.

08
Service stays out of sight

Washer-dryer, coats and brooms sit behind one flush wall by the front door.

⟷
Clay modelRender
3D model → Render

AI concept render from the measured 3D model — not a photograph of a built house.

+3.75+3.45ceiling 2.70FFL +0.40GARAGE · TIMBER-LOOK DOORTIMBER PORCH · 1.2 m PIVOT DOORONE LOW ROOF PLANE — GARAGE TO PORCH
02 · Floor plans

One shell. Three ways to live in it.

The front, the roof, every window and both wet walls are identical in all three plans. Only light internal walls and joinery change — which is why the factory can build any of them on the same line.

A · Hearth
GARAGE3.5 × 6.0 mMASTER10.2 m²ENSUITE4.2 m²DRESSING2.7 m²BED 210.8 m²LOBBY3.4 m²BATH4 m²Great room · 45.2 m²LIVINGDININGKITCHENENTRYSTUDYROOF LINK — COVERED WALK11 0007 5002 8003 1003 9006 400REAR · 2 M TO FENCE (1 M EASEMENT)FRONT · SHARED DRIVEWAY COURTPRIVATE GARDEN 3.1 M05 m

Drawn from the design geometry. Concept stage — not for construction or approval.

What never changes
  • — Front façade, porch and garage
  • — Roof, fascia, gutters and flue
  • — Every window and external door
  • — The wet spine (ensuite + bath) and the utility wall
  • — Module sizes and marriage lines
What changes
  • — Light internal walls in the great room and bay
  • — Kitchen type and position
  • — One door (semi-ensuite) in the bedroom bar
  • — Joinery
03 · Flow

No corridor. One lobby. Every route is short.

The plan is a bar of sleeping and wet rooms beside one big social room. A single 3.4 m² lobby is the only circulation space in the house.

GARAGE3.5 × 6.0 mMASTER10.2 m²ENSUITE4.2 m²DRESSING2.7 m²BED 210.8 m²LOBBY3.4 m²BATH4 m²Great room · 45.2 m²LIVINGDININGKITCHENENTRYSTUDYROOF LINK — COVERED WALK11 0007 5002 8003 1003 9006 400REAR · 2 M TO FENCE (1 M EASEMENT)FRONT · SHARED DRIVEWAY COURTPRIVATE GARDEN 3.1 M05 m
  • Car → front door → sofa
  • Front door → kitchen bench
  • Bed → dressing → coffee
  • Guest → lobby → guest room
  • Sofa → garden
12.6 m
Car to front door, under roof
3.6 m
Front door to kitchen bench
3.4 m²
Circulation space (the lobby)
56%
Great room share of the floor
Zoning

Sleep on the quiet side, one wet spine in the middle, living against the garden, and a flex bay at the front.

SLEEPWET SPINELIVEFLEX BAYGARAGEPRIVATE GARDEN
04 · Site fit

Drawn for the lots we actually buy.

The shell was sized for an 18 m wide Melbourne block first — a new home behind a house that is kept — and then for a deeper lot with four in a row.

EXISTING HOUSE (KEPT)10 × 8 mCARPORT · FRONT HOUSEGARAGEMASTERENSUITEDRESSINGBED 2LOBBYBATHLIVINGDININGKITCHENENTRYSTUDYROOF LINK — COVERED WALKEASEMENT 1 mBUILDING SETBACK +1 mPOS3.1 × 11.335 m²SHARED DRIVEWAY 3.0 mFRONT GARDEN · 6 m SETBACKSTREET18 00032 00005 m
Backyard lot · 18 × 32 m
  • — Front house kept (10 × 8 m) with its own carport
  • — Shared 3 m driveway to a garage on the boundary
  • — Rear: 1 m easement + 1 m clear
  • — Private garden 3.1 × 11.3 m on the quiet side
⟷
BeforeAfter

Same block, before and after. AI concept render from the measured 3D model — not a photograph of a built house.

05 · Exterior

White box, timber heart.

The front composition follows the best Melbourne unit fronts — garage, big window, porch beside a projecting wing — rebuilt in the white-cladding-and-spotted-gum language of our 60 m² home.

Walk around it

Twelve views, 30° apart, rendered from the same measured model. Drag, swipe or use the arrows.

Dusk — the porch soffit and blades are lit from above.
Arriving up the driveway.
The bay leads the front; the porch sits in its corner.
Timber-lined porch, three blades, 1.2 m pivot door.
The link roof: garage apron to porch, one plane.
The private garden side and the stacking door.
Rear: low roof edge and the fireplace flue.
Why the roof link exists.
Summer evening on the deck.

AI concept render from the measured 3D model — not a photograph of a built house.

Rendering…
main skillion → rear box gutterLINK PLANE +3.05bay +3.45flueskylightbox gutter + 2 downpipes2 700fireplace flueREARFRONT+3.75+3.40skillion, falls to the rear
06 · Interiors

Quiet luxury, 2.7 m high.

Oak, limestone, white joinery, black frames. One palette through every room so a small house reads as one calm space.

Great room from the front door (Hearth).
Winter evening.
Back towards the kitchen alcove and the entry.
Kitchen alcove in the bay.
The borrowed-space study at the end of the fireplace wall.
Master bedroom.
Walk-through dressing room.
Ensuite, double vanity.
Guest room.
Main bathroom.
Entry and the hidden utility wall.
Twin Suite: wok kitchen behind glass.
Twin Suite: the second suite.
Studio: the home office in the bay.
Studio: the same room as a guest room.
Studio: L-kitchen and island.
Studio: great room with round table.
Stone and steel.

AI concept render from the measured 3D model — not a photograph of a built house.

07 · Who pays for it

Three plans for the three buyers who pay most for a single-level home.

Each plan answers one buyer's first question. None of them asks the others to compromise the front, the garage or the garden.

DownsizersA
“Can I still have people over?”

A 45 m² great room, a fireplace, a guest room with its own bath, and a garage with a dry walk to the door.

Multi-generation & co-buyersB
“Do we each get our own bathroom?”

Two ensuite suites at opposite ends of a lobby, and a kitchen you can close when you cook.

Work-from-home & young familiesC
“Where do I work?”

A real room with a door and two windows, next to the entry — later a nursery or guest room.

We do not publish prices, rents or returns on this site. Numbers for a specific lot come in a private proposal.

08 · For the factory

Three road-legal modules, one pod, one kit.

The 7.5 m depth is three 2.5 m modules — the widest load that travels without an oversize permit. 11.0 m fits a standard trailer and a 40-foot flat rack. 2.7 m ceilings keep a loaded module under 4.3 m.

M1rear · wetM2middle · dryM3front · wetP1bay podGgarage kit11 0002 5002 5002 5002 800
M111.0 × 2.5 mMaster, ensuite, dressing (part), fireplace wallWet
M211.0 × 2.5 mBedrooms (part), lobby, great roomDry
M311.0 × 2.5 mBed 2, bath, utility wall, entryWet
P13.1 × 2.8 mBay: kitchen (A/B) or study (C)Wet (A/B)
G3.9 × 6.4 mGarage walls + link roof steel, flat-packedKit
4.3 m height limit11 000 × 2 500 × 3 350one module = one legal-width load≈ 4.30
  1. 01Great-room openings across marriage lines are carried by steel portal frames built into the module ends.
  2. 02All wet rooms sit inside one module each — no plumbing crosses a marriage line.
  3. 03Windows, fascia and cladding are fitted in the factory; only the marriage-line strips are closed on site.
  4. 04The plan variants change internal studs and joinery only: one jig set, one window schedule, one roof.
1
Piers + services

Screw piers, sewer, water and power set while the modules are built.

2
Crane day

Three modules and the pod lifted over the front house in one day.

3
Garage + link

Garage kit and the link roof go up; marriage lines closed.

4
Handover

Landscape, fences, final inspection.

Module line — the finished module at the front matches the render.
Floor cassette and wall frames on the jig.
QA inside the finished kitchen pod.
The kit: M1–M3, the bay pod, the garage.
Modules on flat racks.
One module, one legal-width load.

AI concept render from the measured 3D model — not a photograph of a built house.

09 · Specification

The palette of our 60 m² home, one size up.

Materials are chosen to look expensive, age well and be made in a factory.

Cladding
White vertical-groove fibre-cement on cavity battens
Roof
Charcoal standing-seam skillion behind a slim fascia; one low link plane
Windows
Black powder-coated aluminium, double glazed
Front door
1.2 m solid spotted-gum pivot, long black pull
Porch & soffit
Spotted-gum battens, three timber blades
Garage door
Timber-look aluminium sectional
Ceilings
2.7 m flush plasterboard throughout; 2.4 m internal doors
Floors
Wide-board European oak; large-format porcelain in wet rooms
Kitchen
Flat-panel joinery, honed stone, induction, integrated fridge
Fireplace
Electric linear fireplace in a stone wall (all-electric home)
Energy
All-electric: heat-pump hot water, reverse-cycle heating/cooling, solar-ready roof
Structure
Steel floor cassettes on screw piers; light-gauge steel frames
10 · Planning fit (Victoria)

Drawn to the numbers a planner checks first.

The plan was drawn against the deemed-to-comply standards of the Townhouse and Low-Rise Code (Clause 55, in force from 31 March 2025). That is a design intention, not an approval — every lot is checked by a planner.

Private open space25 m², at least 3 m wide3.1 × 11.3 m side garden off the great room
Main bedroom3.0 × 3.4 m + robe space3.0 × 3.4 m, robes in the dressing room
Other bedrooms3.0 × 3.0 m + robe space3.0 × 3.6 m incl. 0.6 m robe
Tree canopy10% of site (lots ≤ 1,000 m²), a tree front and rearGarden trees + front canopy trees on the site plan
Permeability≥ 20% of the siteLawns and gardens kept on both lots
Garage3.5 × 6.0 m clear (car parking)3.5 × 6.0 m clear
EnergyNew homes needing a planning permit: no gas connection (since 1 Jan 2024)All-electric, electric fireplace
11 · For partners and co-developers

A product, not a one-off.

Every design decision was made so the same house can be reused lot after lot — that is where speed and quality come from.

One shell, many lots
The 11 × 7.5 m shell fits an 18 m frontage behind a kept house, and four times on a deep lot.
Approvals get faster
The same drawings, the same standards table and the same answers to the same council questions.
The factory learns
One jig set and one window schedule for all three plans — every build is a repeat, not a prototype.
Buyer choice late
The plan (A, B or C) can be chosen after the permit, because only internal walls change.
EXISTING HOUSE (KEPT)10 × 8 mCARPORT · FRONT HOUSEEASEMENT 1 mBUILDING SETBACK +1 mPOS3.1 × 11.335 m²SHARED DRIVEWAY 3.0 mFRONT GARDEN · 6 m SETBACKSTREET18 00032 00005 m
G4U4G3U3G2U2G1U1STREETSHARED DRIVEWAY 3.0 m18 00056 670

What we do not put on a public page: prices, rents, yields and returns. Those belong in a proposal for a specific lot.

12 · Questions

Questions we get about this house.

Why is the garage not connected inside?

A door between a garage and a house needs fire separation and a step, and it would cost the house a wall. Instead, one low roof covers the 12.6 m from the car to the front door, so you stay dry without the internal door.

Why is the front the same in every plan?

Because the front, the roof and the windows are the expensive, slow parts to change — for the planner and for the factory. Keeping them fixed lets a buyer choose plan A, B or C late.

Is the study a bedroom?

In plans A and B the study is a desk built into the fireplace wall — space borrowed from the living room. In plan C it is a closed room with a door and two windows that can be used as a nursery or guest room.

Can the fireplace be wood or gas?

New Victorian homes that need a planning permit cannot connect to gas, so the base design is an electric fireplace. A wood heater may be possible on some lots, subject to council and flue rules.

Which way does it face?

North is not fixed yet. The plan is drawn to be mirrored so the great room and garden side can face the best light on each lot.

How is it delivered?

As three road-legal 11 × 2.5 m modules, a bay pod and a garage kit, set on screw piers and joined on site. It can also be built conventionally from the same drawings.

Are these photos of a finished house?

No. All images are AI concept renders made from the measured 3D model of the design. The drawings on this page are concept-stage and not for construction.

13 · Enquire

Have a lot that could take this house?

Send the address. We will check the lot against the shell, the garage and the garden before anything else.

Your details go to DollarBuild only, and are used to respond to this enquiry.