The Gap is a suburb where the boundary is rarely where the ground suggests it is. Blocks are large, most of them slope, and many are heavily vegetated. The things people treat as the line, a fence run along the easiest contour, a retaining wall built where the wall was needed, or the edge of the mown grass where the yard gives way to bush, were put there for practical reasons rather than surveyed ones. A boundary survey replaces the assumption with a measurement. A registered cadastral surveyor searches the title and the original survey records for the estate, re-establishes the corners of your lot and marks them on the ground, so you are working from a position rather than a habit.
Two things set The Gap apart from the inner suburbs. The first is terrain. Boundaries here are long and the ground they cross is steep. A small discrepancy at the street compounds over the depth of a lot, so a fence that looks close enough at the front can be well off the line at the rear. Fences also get built where a fence can physically be built, which on a slope is not always where the boundary runs. The second is the bush. The suburb backs onto D’Aguilar National Park and the Enoggera Reservoir catchment, and it is threaded with council bushland, park and drainage reserves. A large number of lots in The Gap share at least one boundary with public land, and those boundaries are often unfenced, overgrown and never checked.
Settlement is the wrong side of the line to find a problem, because after it the problem is yours. A survey during the due diligence period tells you the true dimensions of the lot, whether the fences and walls reflect them, and what sits across the land in the way of easements.
That last point matters here more than most people expect. The Gap’s sewer network follows the gullies, which means mains run through backyards rather than along streets in parts of the suburb, and the easements that protect them can land squarely on the flattest piece of ground you were counting on building over. Drainage easements are common where stormwater is directed between lots on falling ground, and access easements serve the battle axe lots created through decades of infill subdivision. Lower areas near Enoggera Creek and its tributaries are also flood affected, so if you are buying with a project in mind it is worth knowing the boundaries, the easements and the levels before you commit rather than after.
Boundary arguments between neighbours drag on because nobody involved can prove anything. Both parties are working from memory, from the position of an old fence, or from what a previous owner once said, and the discussion never reaches solid ground.
On sloping blocks the argument is usually about more than a fence. A dividing structure in The Gap is often a retaining wall with a fence sitting on top of it, and the cost of replacing that is an order of magnitude different from a run of palings. Whether the wall is on the boundary, above it or below it changes who is responsible for what. Having the line marked shifts the conversation onto facts that belong to neither household, which is what makes it useful. It gives both owners a shared basis for agreeing on a replacement and splitting the cost, and if the matter progresses to a fencing notice under the Neighbourhood Disputes Act or to QCAT, you are no longer relying on assertion. Most disputes lose their heat once the pegs go in.
An encroachment is a structure sitting on the wrong side of a boundary, and in The Gap it is often something that took real money to build. Retaining walls, carports, sheds, decks, pools, water tanks and garden studios all turn up over the line, usually because they were positioned off a fence that was itself in the wrong place.
The other version of the problem is quieter. Where a lot backs onto a reserve or the national park, yards tend to creep. Mown grass, garden beds, chook pens, cubby houses, fire pits, cut tracks and cleared understorey extend past the rear boundary without anyone making a decision to do it, sometimes over several owners. These become live issues at the point of sale, when a certifier looks closely at an application, or when council makes contact. A survey establishes precisely where each structure sits relative to the boundary, which is what any sensible resolution starts from, whether that ends in an agreement, an easement, a rectification or removal.
Boundaries with public land behave differently from boundaries with a neighbour. There is nobody on the other side maintaining a fence or contesting a line, so nothing prompts anyone to check it, and the original survey marks were often placed in bush and have since been lost to erosion, earthworks, tree growth or a bushfire hazard reduction burn. Re-establishing those corners can mean recovering marks well beyond the site and working the line back in, which is exactly the work a cadastral surveyor is trained and registered to do.
It is worth doing properly. Building near a rear boundary that adjoins reserve, applying for vegetation works, resolving an encroachment or simply deciding where the yard ends all rest on that line being correct rather than assumed.
Setbacks, site cover, boundary clearances and building heights are all measured from the boundary, so a wrong line produces a wrong design, and the error surfaces at the worst possible moment.
Most projects in The Gap benefit from a detail and contour survey taken with the boundary work. On this terrain the levels are not a formality. Site fall drives the floor levels, the retaining, the driveway grade and the cost of the whole job, and getting it from contour mapping rather than a survey is how budgets come apart. A detail survey to Australian Height Datum gives your designer or architect the existing structures, spot levels, contours, visible services, significant trees and the position of adjoining buildings and walls that have to be worked around. Where bushfire, biodiversity, waterway corridor or landslide overlays apply, accurate ground data and tree locations feed straight into the assessment work rather than being estimated.
Larger holdings in The Gap raise the subdivision question regularly, and the answer usually turns on access, grade and constraint rather than area alone. Subdivision surveys build on the same re-established boundaries, and our in house town planners can assess the triggers and overlays before you spend money on design. For duplex and dual occupancy projects, a building format plan creates the separate titles. Once construction starts, the same boundaries carry through to the construction set out, as constructed survey and Form 12. We also prepare lease surveys for the tenancies around The Gap Village and the local commercial and retail centres.
Survey My Block is a Registered Consulting Cadastral Surveyor Organisation with the Surveyors Board of Queensland, and we work throughout The Gap and the surrounding western and north western suburbs including Ashgrove, Bardon, Keperra, Upper Kedron, Ferny Hills, Enoggera, Mitchelton and Everton Park.
A boundary survey with us includes the title and survey record search, the field work to re-establish and mark your corners, and a plan showing the boundary against the fences, walls and structures currently on the site. We also provide identification surveys, detail and contour surveys, 3D scanning, subdivision surveys, lease surveys, set out certification and Form 12s across The Gap. If you want certainty before your next decision on the property, get in touch and we will explain what is involved for your particular block, or read more about what a survey costs and what affects the price.
In Queensland, a survey of existing property boundaries is commonly called an identification survey. A registered cadastral surveyor examines survey records and physical evidence to identify, re-establish and, where appropriate, mark your property boundaries. An identification survey confirms existing boundaries, it does not create or alter property interests.
We recommend a boundary survey before installing or replacing a fence, constructing a retaining wall, building an extension, or carrying out other work close to a property boundary. It is also useful when purchasing or developing property, investigating a possible encroachment, or resolving uncertainty between neighbours.
Not necessarily. Fences, retaining walls and other improvements are sometimes built away from the true boundary, and the boundary cannot be reliably located by measuring from the kerb. GPS apps, Queensland Globe and online property maps are also not authoritative sources for locating boundaries on the ground. A cadastral survey is required to establish the boundary accurately
The surveyor will review the relevant title and survey information, undertake field measurements and reinstate the surveyed boundaries. Depending on the scope and site conditions, boundary corners may be marked or re-marked, and the survey plan may show relevant fences, retaining walls, buildings and encroachments in relation to the boundary.
A boundary survey provides independent professional evidence showing where the boundary is located and how nearby fences, walls or structures relate to it. However, the survey itself does not determine who is responsible for an encroachment or compel someone to relocate a structure. Where an affected improvement or encroachment is identified, the surveyor may be required to notify the affected landholder, and unresolved disputes may require negotiation, mediation or legal advice.
