ALTERATIONS & ADDITIONS

Home » Services » Alterations & Additions

One Design Team for Every Alteration and Addition

Every alteration or addition starts with what’s already standing, not a blank block. Before we draw anything new, we assess the existing structure: its footings, framing, roof form, and how the house actually sits on the site. That’s what decides whether a rear extension can tie in cleanly, whether the existing footings can carry a second storey, or whether the “quick” idea you had in mind is actually a bigger job once the structure’s properly looked at.

Your reasons for renovating carry equal weight. A family that’s outgrown the kitchen, a couple wanting a second storey instead of moving suburbs, a home that needs a carport or new fencing to actually work day to day. Those conversations decide the scope, not the other way around.

This page covers our alterations and additions work: extensions, renovations, carports and fencing for existing Perth homes, handled as one service, Extensions & Renovations. One design team carries the same read of your existing home across the whole project, useful if a smaller job grows in scope once we’ve assessed the site properly.

More Than Adding a Room

Existing structure assessment. Footings, framing, roof form and services checked before any new design decision gets made.
R-Codes and council requirements. Setbacks, boundary wall provisions, overshadowing and privacy rules checked against where your existing home already sits on the block.
Design matching. Roof pitch, materials and proportions worked out against what's already built, so new work reads as part of the house, not bolted onto it.
Structural coordination. Liaison with structural engineers on tie-ins, underpinning or any load-bearing changes the existing structure needs to carry new work.
Budget-realistic staging. Plans costed against your budget, and staged where useful, so you know what's happening to your home and when.

Extensions & Renovations

Rear extensions, second-storey additions, kitchen and bathroom renovations, carports and fencing — each designed to tie into your existing home's structure, roofline and street presence rather than sit apart from it. Covers everything from a single-storey rear addition to a full second-storey extension, through to council submission and construction-ready drawings.

15 Years of Alteration and Addition Design in Perth

Homeowners renovating in Perth look for three things in a design partner: someone who reads what’s already built before proposing new work, someone who keeps the council process moving without surprises, and a price that holds once drawings start. That’s the standard behind every alteration and addition we take on. One design team who assesses your existing home properly before drawing anything new. The same council relationships across every Perth suburb. A design costed against your actual budget from day one.

Questions? You’re covered.

It depends on scope. Many single-storey rear extensions that stay within setbacks and don't push past certain floor space limits can qualify as deemed-to-comply and skip a full DA. Second-storey additions, and anything close to a boundary, usually need one. We check this against your specific site before designing anything.

An alteration changes what's already there — reconfiguring a kitchen, opening up a wall, converting a room — without adding floor space. An addition adds new floor space: a rear extension, a second storey, a new wing. Most renovation projects involve some of both, which is why we treat them as one service rather than two.

Often, yes, though it depends on your existing footings and structure being able to carry the extra load, plus R-Codes overshadowing and privacy provisions once you're building upward. A structural assessment early on tells you whether your existing footprint can take a second storey as-is or needs strengthening first.

R-Codes sets minimum setbacks from side and rear boundaries, and they tighten as an extension gets taller. Some smaller single-storey extensions can sit closer to a boundary under boundary wall provisions, subject to conditions. We check your block's specific setback allowance before concept design starts.

For almost any addition, or a wall removal that affects load-bearing structure, yes. We coordinate directly with a structural engineer on tie-ins, underpinning or beam sizing wherever the existing structure needs a new load path.

Yes. Many established Perth homes were built with materials and methods that need particular handling once you start altering or demolishing part of the structure, and our site assessment accounts for that upfront. If your home sits in a heritage or character protection area, council will also expect the new work's materials, roofline and street presence to match the existing streetscape — something we factor in at design stage, not after a knockback.

Yes, alongside extensions and renovations. Carports and fencing are often handled as an add-on to a bigger renovation, or as a standalone project on their own.

Usually, yes, particularly with a staged extension. We can plan a design and construction sequence with your builder that keeps part of the home livable through the build, though a full second-storey or major structural job may need you out for part of the process.

It depends on the scope — a full second storey costs differently to a smaller rear extension — and on what your existing structure needs before new work can start. We give a fixed design quote after a site visit and a look at your existing home's condition.

Existing structure assessment, concept and design development matched to your existing home, construction-ready working drawings, and DA or deemed-to-comply documentation for council. We coordinate with structural engineers where needed and hand documentation to your builder for pricing.

Ready to Start Your Alteration or Addition?

Extension, second storey, renovation, or a smaller job like a carport or fencing. Start with a conversation about your home and your brief.