Where does TAG Homes build?

TAG Homes builds across Wollongong, the Illawarra, and the NSW South Coast, including suburbs from Stanwell Park in the north to Vincentia in the south. Our main service area covers the Wollongong, Shellharbour, Kiama, and Shoalhaven local government areas. We also take selected projects in the Southern Highlands.

What types of homes does TAG Homes build?

We specialise in custom homes, duplexes and dual occupancy builds, knockdown rebuilds, and joint venture property developments. Every project is designed and built specifically for the clients land, lifestyle, and budget. We do not build from a project home catalogue.

How long does a custom home build take?

Most custom home builds take between 8 and 14 months from development application approval through to practical completion. Knockdown rebuilds typically take 10 to 16 months when factoring in demolition and a new development application. Timelines vary based on design complexity, council area, and site conditions. We discuss realistic timeframes clearly at the consultation stage.

Is TAG Homes a licensed builder?

Yes. TAG Homes is a licensed builder under NSW Fair Trading, Licence No. 369859C. We carry full home building compensation on all projects over $20,000, as required by the Home Building Act 1989.

Has TAG Homes won any building industry awards?

Yes. TAG Homes was recognised with the 2024 HIA NSW Housing Award, awarded by the Housing Industry Association of Australia. This is one of the most respected recognitions in the residential construction industry in NSW.

What is a joint venture build with TAG Homes?

A joint venture is a collaborative arrangement where TAG Homes contributes construction expertise and the landowner contributes their block. Both parties agree on a structure that typically involves TAG building a dual occupancy or duplex and sharing the outcome. It suits landowners with a suitable block who want a new home built without the full capital outlay.

When does a knockdown rebuild make more sense than renovating?

A knockdown rebuild often delivers better value when the existing structure has significant issues such as asbestos, poor layout, or inadequate foundations, when the renovation cost exceeds 60 to 70 per cent of a new build cost, or when the client wants a home designed from scratch. We give every client an honest site assessment and walk through the comparison at no charge.

Does TAG Homes provide fixed-price contracts?

Yes. We use fixed-price contracts so clients have certainty on their total construction cost before work begins. We are transparent about inclusions and exclusions from the outset, and we discuss provisional sum items clearly during the pre-contract stage.

Can TAG Homes build on a sloping block?

Yes. We have significant experience building on the sloping and challenging sites that are common across Wollongong and the Illawarra. We account for retaining walls, drainage, and engineering early in the design process to avoid surprises during construction.

How does the design and build process work at TAG Homes?

We work in close collaboration with architects and draftspeople from the earliest stages. The process moves through initial consultation, site assessment, brief development, design and documentation, development application or complying development certificate, construction, and handover. One point of contact manages every stage.

What makes TAG Homes different from larger project home builders?

TAG Homes is a boutique builder. Every project is custom-designed, and Grant is personally involved from first meeting to handover. Clients deal with the same team throughout the entire build, not a rotating contact centre. We do not offer project home catalogues or volume builds.

How do I start the process with TAG Homes?

The best first step is a phone call. Call Grant directly on 0423 409 212 to have a straightforward conversation about your site, your ideas, and your timeline. From there, we will arrange a site visit and consultation at no obligation.

Building on a Sloping Block in the Illawarra: What to Know

Apr 16

Written By Shaina Miller

Sloping blocks are everywhere in the Illawarra. From the escarpment-facing lots in Thirroul and Austinmer to the hillside streets of Figtree and Corrimal, a significant proportion of the region's residential land has some degree of fall. That is not a problem. But it does change the way a build is planned, priced, and executed, and understanding those differences early saves a lot of surprises later.

Why Sloping Blocks Are So Common in the Illawarra

The Illawarra Escarpment runs the length of the region, and the suburbs that sit at its base and along its face are among the most sought-after in the area. Thirroul, Bulli, Austinmer, Scarborough, Coalcliff — these are precisely the locations where the views are best, the blocks slope most significantly, and the build complexity is highest.

Further south, Kiama and Gerringong have their own terrain challenges: headland blocks, coastal slopes, and lots that face the ocean in ways that add both value and engineering requirements. Even in flatter parts of Wollongong, blocks that appear level can carry a significant gradient from front to back once you actually measure.

What a Sloping Block Actually Costs to Build On

The honest answer is: more than a flat one, but the range is wide. A modest slope on a well-serviced block might add $30,000 to $60,000 in site costs over a comparable flat build. A heavily graded escarpment site with rock, significant retaining requirements, and difficult access can add $100,000 or more before a single wall goes up.

The cost drivers on a sloping site are:

Cut and fill earthworks are the first consideration. To create a level building platform, soil either needs to be cut away from the high side or filled in on the low side, or both. The volume of material involved and whether it needs to be retained or removed from site drives a significant portion of the cost.

Retaining walls are often unavoidable on sloping sites. A well-engineered retaining system is not a shortcut — it is a structural requirement that protects the build, the neighbours, and the land below. Costs vary considerably depending on height, material, and the complexity of the drainage solution behind the wall.

Rock is the variable that can change a budget significantly. Drill and blast or rock hammer excavation on a site with significant rock formation is a legitimate cost that no builder can quantify without a geotechnical investigation. Assuming no rock, then finding it, is one of the most common ways a building budget gets into trouble.

Slab and foundation engineering on a slope is more complex than a standard slab. Stepped footings, pier and beam construction, or a split-level slab approach all have different cost profiles, and the right solution depends on the site.

How Good Design Turns a Sloping Block Into an Advantage

The best sloping block builds in the Illawarra do not fight the gradient. They use it. A split-level design that steps down the slope can create separation between living areas, introduce variation in ceiling heights, and take full advantage of views that a flat block simply cannot offer.

Garages and storage tucked under the main living level on a downslope site use otherwise dead space effectively. Ground floor entries on upslope sites can lead into mid-level living that sits above the street, creating privacy and outlook at the same time. These are not compromises — they are the advantages that make escarpment homes worth what they cost.

TAG Homes has built across sloping sites from Woonona to Bulli to Kiama. The experience of working on the Illawarra's terrain repeatedly means site assessment is part of every consultation, not an afterthought.

What to Check Before You Buy a Sloping Block

The time to understand a site's complexity is before you own it, not after. A few things worth checking: the fall across the site in metres and the direction it runs, the council flood mapping and any drainage requirements, whether there is rock visible at surface level or in neighbouring excavations nearby, and what the council setback requirements mean for a split-level design.

For blocks with significant slope, commissioning a geotechnical report before you commit gives you the information needed to budget properly. It is a small cost relative to the risk of proceeding without it.

Starting the Conversation About a Sloping Site

Sloping block builds need a builder involved early. The design and the engineering are too interconnected to treat separately. A builder who sees the plans after the architect has finished is too late to influence the decisions that most affect cost.

At TAG Homes, the process starts with a site visit and a phone call. We can give you a straight read on what the site will involve and roughly what the complexity means for your budget. From there, if the numbers work, we produce a full estimate and tender documentation before anything is locked in.

Give us a call on 0423 409 212. It is the most useful conversation you can have about a sloping block.

Frequently Asked Questions

How much does it cost to build on a sloping block in Wollongong? Site costs on sloping blocks in the Illawarra typically add $30,000 to $100,000+ over a comparable flat block build, depending on the degree of fall, rock presence, retaining requirements, and access. The range is wide because no two sites are the same. A proper site assessment before construction is the only way to get an accurate figure.

Do sloping blocks cost more to build on in the Illawarra than Sydney? The Illawarra's escarpment geology means rock is more common here than in many parts of Sydney, which can push site costs higher on certain blocks. On the other hand, Illawarra land values and construction costs are generally lower than inner Sydney, so the overall project cost often remains competitive.

What type of house design works best on a sloping block? Split-level designs generally work best on sloping Illawarra blocks. They work with the gradient rather than against it, create natural separation between living zones, and can take full advantage of views and natural light. Trying to force a single-level design onto a steep site usually costs more and delivers less.

Does a sloping block need council approval in Wollongong? All new builds require approval regardless of site conditions. On sloping sites, retaining walls above a certain height may require a separate development application to Wollongong City Council, and engineering plans for retaining and drainage are typically required as part of the construction documentation. Your builder and certifier will confirm what applies to your specific site.

Shaina Miller