Thompson Renovate Group
More room, without moving

Additions, Conversions and Flexible Living Space

Moving is expensive and disruptive, and stamp duty alone can swallow a renovation budget. The right 30 square metres may already be inside your Ballarat-area home, or fit beside it.

Ageing parents, remote work, growing teenagers: each changes what a house needs. Start with what the site and structure can support.

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Bright finished home addition in the Central Highlands with a connected living room, wide windows, and a view of the backyard
Find the right first move

Which Space Makes Sense First

Compare new footprint with the rooms your house already has. No two blocks behave alike.

Add or adapt

Rear extension or under-house room?

A rear extension adds daylight and floor area where the existing plan feels pinched, but it needs suitable footings, workable setbacks, and enough room on the block. On a sloping site, converting under-house space often limits exterior work and can add a bedroom, rumpus room, or office, provided headroom, moisture control, stairs, and safe exit check out. The better value depends on the house, not a rule of thumb.

First question: Is there buildable space outside, or usable space below?

Look up

Roof-space (attic) conversion

A quiet office or bedroom may fit above the ceiling.

First question: Is there enough headroom for stairs and finished space?

Repurpose

Garage conversion

Turn unused parking space into a suite, studio, or workroom.

First question: Can the slab stay dry and insulated?

Separate entry

Small second dwelling

A small independent home can give family more privacy.

First question: Do your zone and site allow a small second dwelling?

A conversion, carefully planned

Inside a Garage-to-Suite Conversion

Detached garage interior converted into a calm guest and work suite, with insulated walls and a new glazed exterior opening
A former vehicle bay can become a comfortable room when the floor, walls, and openings are treated as part of the home.

Keep the option to open it up later.

An unused detached garage can work as a guest suite with a desk by day, if the slab stays dry and the envelope is upgraded for year-round use. Turning a garage into a habitable room needs a building permit, and the roller-door opening needs a properly framed wall and a well-detailed window or entry. We plan insulation, draught sealing, heating, and the electrical supply together. A removable partition can separate sleeping and work zones now, while keeping the room easy to reconfigure later.

Good bones matter.

  • Check slab moisture before choosing floor finishes.
  • Design the old door opening for weather and security.
  • Confirm electrical supply capacity before adding new loads.
Check before drawing

Structure, Systems and the Rules

Small details change the scope. Open a topic to see what we check before design work gets too far.

Footings, site classification, and reactive clay

An extension needs footings suited to its loads and local conditions. We arrange a soil test and site classification, look at existing footings and stumps, and check drainage; reactive clay and water movement around Ballarat can affect excavation and footing design. The engineer confirms the actual design for the property.

Headroom, stairs, and safe exit

A roof-space or under-house conversion has to work as a safe route through the house, not just fit a bed. We measure ceiling heights and stair geometry against the National Construction Code, then confirm the approach for the intended room with the building surveyor.

Heating, wiring, and moisture control

We check heating and cooling capacity and the electrical supply before adding rooms or equipment. Spaces below ground level need a moisture plan that addresses drainage and humidity before finishes cover the walls.

Permits and inspections

Permit steps vary by council and scope. We confirm whether a planning permit is needed (for example, under a heritage overlay), identify when engineered drawings are required, and plan the mandatory inspection stages with the building surveyor before construction proceeds.

Room to live together

Designing for Two Households in One Home

Multi-generational home interior showing a private side entry, a small kitchenette, and a sound-separated family suite beside shared living space
Plan the boundary between private rooms and shared spaces before choosing finishes.

Privacy changes everything.

A dedicated entry, a compact kitchenette, and sound separation can give a parent or adult child daily independence without making the house feel divided. Keep the kitchen and gathering spaces shared if that suits the family. Wider doorways and a bathroom planned for future mobility can make the suite useful longer.

An interior conversion can keep everyone under one roof. If separate utilities, a more independent entrance, or greater privacy matter most, ask whether a small second dwelling (granny flat) is a better fit and confirm the planning rules before settling on a plan.

Private entry Sound control Accessible route
A clear sequence

The Feasibility-to-Build Sequence

Measure first. Then spend design effort where it can move the project forward.

  1. Assess the site and structure

    Measure the house, block, existing systems, and the space you want to change.

  2. Check zoning and site coverage

    Confirm setbacks, overlays, and buildable area with your local council.

  3. Prepare plans and permits

    Develop drawings, bring in engineering when needed, and lodge the permit application.

  4. Build with the envelope protected

    For additions, establish the exterior connection and weather protection before interior finishes.

Serving Ballarat and the Central Highlands

Find Out What Your House Can Actually Take

Tell us where the space is missing and what you are considering. We can start with the property, the existing structure, and the questions that determine feasibility.

Have plans or a survey in hand? Call and tell us what you already know.

Request a Renovation Consult Call +61 3 5550 4127
Request a Renovation Consult
Request a Renovation Consult

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