A contractor builds a council car park: 90 bays, kerb, drainage, asphalt, line marking. It is priced from the road rates the business uses every week, because a car park is obviously easier than a road — no traffic, no live services, light vehicles.

By the following winter there is water standing in four places, a rutted line where the garbage truck turns every Tuesday, and a settled trench across two bays. None of those is a workmanship failure in the usual sense. They are what happens when a flat pavement is designed and priced as a slow road.

This guide covers that family of work. Road pavements are covered in our guide to road construction and resurfacing tenders, and the asphalt itself in asphalt supply, production and laydown.

A market hiding inside other projects

Hardstand construction rarely appears as a tender category, which is part of why it is underpriced. It arrives as a component of something else.

• Council car parks at sportsgrounds, halls, pools, libraries and depots — small, frequent, and well suited to an SME.
• Depot and works yards for councils, authorities and private operators, usually heavy-duty and often staged around operations.
• Industrial and logistics hardstands — container storage, truck parking, loading aprons — see data centre and industrial civil works.
• Laydown and construction pads for renewables, transmission, mining and major projects, sometimes temporary and sometimes permanent — see renewable energy and transmission civil works.
• Car parks within subdivisions and developments — see working for private developers.
• School, hospital and community facility parking, usually with pedestrian and accessibility requirements front and centre — see schools, health and social infrastructure.
• Park-and-ride and station car parks, which bring rail interface requirements — see rail civil works tenders.

The commercial attraction is that this work is small, repeatable, locally procured and frequently let as a whole package — earthworks, drainage, pavement, concrete, line marking — which suits a civil SME that self-performs several of those trades.

Why a hardstand is not a road

	Road	Hardstand or car park
Loading	Moving wheel loads, spread along a path	Static and repeated loads in the same spot; point loads from legs, jacks and containers
Grade	Designed crossfall and longitudinal grade; water leaves easily	Often very flat for operational reasons; water does not want to go anywhere
Geometry	Long and linear; plant works efficiently	Broken into bays, islands and edges; constant turning and short runs
Turning	Gentle radii at speed	Tight, slow, full-lock turning that shears the surface
Users	Vehicles	Vehicles and pedestrians, including people with disability
Tolerance for defects	Measured against ride quality	Measured by a client standing in a puddle

The row that causes the most trouble is the second. A road sheds water because it was designed to; a flat pavement only drains if every element is right — and the tolerances that are comfortable on a road become the difference between draining and ponding here.

The loads that actually govern

• Static loads deform pavements differently from moving ones. A loaded trailer parked in the same spot every night, or a container stack sitting for months, applies sustained pressure that produces rutting and creep in flexible pavements.
• Point loads are the hidden governing case — container corner castings, trailer landing legs, jack pads, stabiliser feet. These concentrate very high pressure on a small area, and they are what fails a pavement designed for wheel loads.
• Turning shears the surface. Full-lock turning of a heavy vehicle applies horizontal forces that tear an asphalt surface, which is why entries, aprons and bin pads fail first.
• Channelisation. Vehicles follow identical paths through an entry or an aisle, so the loading is concentrated rather than spread.
• Occasional heavy vehicles govern a light pavement. The garbage truck, the delivery semi and the fire appliance determine the design even in a car park full of sedans.
• Design life and usage are assumptions — if the client’s operation changes, so does the pavement’s adequacy, which is worth recording.

At tender stage the useful question is: what is the heaviest thing that will ever stand still on this, and where? That question is frequently not answered in the documents and is worth asking in the clarification window.

Choosing the surface

Surface	Suits	Weakness
Asphalt	Car parks, light to medium duty, fast construction	Deforms under sustained static and point loads, and under turning in heat
Concrete	Heavy duty, point loads, container and truck hardstands, bin and wash pads	Cost, cure time, and joints that must be designed and maintained
Sprayed seal	Low-cost rural and overflow parking	Not suited to turning, static heavy loads or pedestrian areas
Segmental paving	Civic and pedestrian-heavy areas; local repair without plant	Needs restrained edges and a well-built base; rutting if the base is weak
Unsealed or stabilised gravel	Temporary laydown, overflow, rural	Dust, maintenance, and runoff quality obligations
Permeable or porous surfaces	Where stormwater quality drives the design	Maintenance regime is essential or they clog, and the client must accept it

Mixed surfaces are common and sensible: concrete where vehicles stand, turn and dwell; asphalt where they drive. Concrete aprons at entries, bin pads, loading areas and truck standing bays, with asphalt through the aisles, is the arrangement that fails least — and proposing it where the documents specify asphalt throughout can be a genuinely valuable alternative.

Drainage: the hardest part of a flat pavement

Almost every hardstand complaint is a water complaint, and the reason is geometric: on a flat surface there is very little fall to work with and no room for error.

• Minimum grades are minimums, not targets. Setting out to the minimum means any construction tolerance produces a flat spot, and a flat spot is a puddle.
• Construction tolerance eats the fall. Over a long bay, normal surfacing tolerance can exceed the designed fall entirely. Build above minimum where the design allows.
• Grade to the pit, and check it with a string line and a level before surfacing rather than after.
• Pit and grate levels decide everything. A grate set a few millimetres high ponds the whole catchment around it; one set low collects every bit of grit.
• Subsurface drainage matters more than on a road, because water that gets into a flat pavement has no easy way out. Subsoil drains at the low side and under kerbs are cheap insurance.
• Treatment is usually required. Car park runoff carries hydrocarbons and sediment, so gross pollutant traps, sediment basins or treatment devices are commonly part of the package — see culverts, headwalls and drainage structures.
• Survey the finished surface before you hand it over. A contour or spot-level check finds the ponding before the client does, when it is still cheap to fix.

The single most valuable habit on this work is a water test: flood a section before the final surface goes down, or after it, and watch where the water goes. It is the only method that finds the defect the levels did not.

Subgrade, and the site you were given

• Hardstands are often built on the worst land available — the back of a depot, a filled corner, an old stockpile area — because the good ground went to the building.
• Uncontrolled fill is common and may be deep, variable and full of buried surprises. A pavement design assuming a uniform subgrade over variable fill will produce differential settlement.
• Proof rolling is the control, and it needs to be done and witnessed before any pavement material goes down — see pavement stabilisation, testing and conformance.
• Soft spots are a variation question, so agree how they are identified, measured and paid before the first one appears.
• Stabilisation or geosynthetic separation is frequently cheaper than deep excavation and replacement — see geosynthetics in civil construction.
• Services beneath are routinely found where old yards are rebuilt, and old yards rarely have reliable records — see underground services and utility strikes.
• Contamination is a real possibility on depot and industrial sites, where fuel, oil and wash-down have soaked in for decades — see landfill and remediation civil works.

Concrete hardstands: joints, reinforcement and curling

Where the loads are heavy or static, concrete is the answer, and the detailing is where it succeeds or fails.

• Joints are a design element, not a construction convenience. Spacing, type, load transfer and sealing are specified, and improvising them on site is how a hardstand fails.
• Load transfer across joints — dowels or keying — prevents differential movement under wheel loads. Without it, joints step and spall.
• Saw cut early enough. The window for control joints is short, and missing it produces random cracking that is both a defect and a maintenance liability.
• Curling at slab edges is caused by differential drying and is made worse by poor curing. It produces a slab that rocks under load, which destroys joints.
• Curing is the cheapest quality step and the most skipped, and on a large flat area exposed to sun and wind it matters more than almost anywhere — see concrete supply, placement and testing.
• Surface finish must suit the use: slip resistance for pedestrians, texture for heavy vehicle traction, and a finish that can be cleaned where wash-down occurs.
• Falls still apply. A concrete hardstand ponds exactly as readily as an asphalt one.

Kerbs, edges, services and the things in the way

• Unsupported pavement edges fail first. Kerb, edge beams or a thickened edge restrain the pavement and keep water out of the layers.
• Islands, kerbs and planters break the job into small areas, which destroys paving and compaction productivity. Count them before pricing from an area rate.
• Pits, covers and service lids in the running surface are a maintenance and tolerance problem, and setting them to the finished level is a measurable item of work — see dockets and daily records for why the levels should be recorded.
• Lighting and electrical conduits, footings and pits have to be coordinated before pavement, not retrofitted — see street lighting, traffic signals and electrical civil works.
• Landscaping interfaces are where water and soil migrate onto the pavement; levels and edge restraint decide whether that happens.
• Wheel stops, bollards and barriers are small items in large numbers, with their own fixing and setting-out requirements.
• Charging infrastructure increasingly appears in car park scopes, bringing conduit, pits and footings to be coordinated early.

Line marking, signage and accessibility

The last package on the job is the one the client inspects most closely, because it is the part they can see and count.

• Bay dimensions, aisle widths and turning paths are set by the off-street parking standard and by the planning approval, and getting a bay count wrong is a conspicuous failure.
• Accessible parking has specific requirements — dimensions, shared areas, gradients, bollards, signage and the path of travel from the bay. These are compliance obligations, not preferences, and they attract complaints.
• Gradients in accessible bays and on paths of travel are tightly limited, which interacts directly with the drainage falls in §05. This conflict is real and must be resolved in design, not on site.
• Pedestrian routes, crossings and tactile indicators are frequently part of the scope and have their own detailing rules.
• Marking needs a cured surface. New asphalt and concrete both need time before marking, which is a programme item at the end of the job — see line marking, signage and roadside furniture.
• Signage and wayfinding are usually specified and are easy to under-price as an afterthought.

Building it while they keep using it

Hardstands and car parks are almost always rebuilt in service, because the facility they serve cannot close.

• Staging multiplies the cost. Each stage has its own establishment, edges, temporary drainage, joints and traffic arrangement. A three-stage car park is not a car park divided by three.
• Temporary parking and access have to go somewhere, and that is usually the client’s problem to solve but your problem to coordinate.
• Pedestrians are present throughout, often including elderly and disabled users at community facilities, which makes separation a serious control rather than a formality — see site traffic and plant-pedestrian separation.
• Temporary joints between stages become permanent weaknesses if not detailed, and they are where settlement shows.
• Emergency and service access must be maintained — fire appliances, ambulances, waste collection, deliveries.
• Operating hours may be restricted, and at a school or hospital the available window can be very narrow.

The community-facing side of this is substantial on council work, and a sound engagement approach is part of the bid — see community and stakeholder engagement plans.

Pricing, and where the money goes

Element	Note
Area rates do not transfer from roads	Small, broken areas with many edges produce far lower productivity than a linear job
Edge and island work	Count the linear metres of kerb and the number of islands, and price them as the labour-intensive items they are
Subgrade risk	Agree how soft spots are identified, measured and paid before you start
Drainage	Pits, pipe, subsoil drains and any treatment device, plus the levels work to make a flat surface drain
Staging	Establishment per stage, temporary edges and drainage, and lost productivity
Concrete areas	Where used, they carry joints, curing, cure time and a different crew
Line marking and signage	Including the wait for the surface to cure
Survey and water testing	Proving the surface drains before handover, not after
Defects risk	Ponding is the most commonly claimed defect in this work, and rectifying it after surfacing is expensive

The honest summary is that a car park is a small job with the item count of a large one. Pricing it from a road area rate is the error that makes this market look unprofitable to contractors who are actually just underpricing it.

What a tender response should show

• That you have identified the governing load — the garbage truck, the semi, the container — rather than treating it as light-vehicle pavement.
• How you will achieve drainage on flat grades, including building above minimum fall, level control before surfacing, and a water test before handover.
• Your subgrade verification, including proof rolling and what happens at a soft spot.
• The staging plan, with how the facility keeps operating and how pedestrians are separated.
• Accessibility compliance, specifically, including how the gradient conflict with drainage is resolved.
• Where you propose concrete rather than asphalt, and why — a short, well-argued alternative that frequently adds value.
• The handover evidence: levels, test results and the drainage check.

Checklist

• What is the heaviest vehicle or load that will stand still on this, and where?
• Are there point loads — container castings, trailer legs, jack pads — in the design case?
• Is the pavement design based on the occasional heavy vehicle, not the average car?
• Are entries, aprons, bin pads and turning areas concrete rather than asphalt?
• What are the design falls, and are they above the minimum or at it?
• Will construction tolerance consume the available fall over the longest bay?
• Are pit and grate levels set to the finished surface, and checked?
• Is subsoil drainage included at low points and behind kerbs?
• Is stormwater treatment required, and is it in the scope?
• Has the subgrade been proof rolled and witnessed before pavement?
• Is there an agreed mechanism for soft spots before the first one appears?
• Could the site be contaminated, given its previous use?
• Are concrete joint spacing, load transfer and sealing designed rather than improvised?
• Is the curing regime specified and resourced for a large exposed area?
• Do accessible bay gradients conflict with drainage falls, and is that resolved in design?
• Has the bay count and aisle width been checked against the approval?
• Is marking programmed after the surface has cured?
• Have edges, islands and kerb metres been counted rather than assumed?
• Is each stage priced with its own establishment and temporary works?
• Is a water test planned before handover?

The short version

• Hardstands and car parks arrive as components of other projects, which is part of why they are underpriced.
• They differ from roads in three ways that decide everything: static and point loads, very flat grades, and pedestrians who use the surface.
• Point loads from container castings, trailer legs and jack pads are the hidden governing case, not wheel loads.
• Full-lock turning shears asphalt, which is why entries, aprons and bin pads fail first.
• The occasional heavy vehicle governs a car park full of cars.
• Concrete where vehicles stand, turn and dwell; asphalt where they drive. Proposing that mix is often a valuable alternative.
• Almost every complaint is a water complaint. Minimum grades are minimums, and construction tolerance can consume the entire designed fall.
• Flood-test a section before handover. It is the only method that finds the defect the levels did not.
• Hardstands get the worst ground on the site. Proof roll, agree the soft-spot mechanism first, and expect old services and contamination on depot sites.
• In concrete, joints are a design element: spacing, load transfer, early sawing and curing. Curling destroys joints.
• Accessible bay gradients conflict directly with drainage falls. Resolve that in design, not on site.
• A car park is a small job with the item count of a large one. Road area rates do not transfer.

Sources and further reading

This guide is general information for Australian civil construction businesses and is not engineering advice. Pavement design for static, point and heavy vehicle loads, subgrade assessment, joint design and load transfer in concrete pavements, and drainage design on flat grades are engineering matters requiring site-specific design by a suitably qualified engineer. Off-street parking geometry, accessible parking requirements, gradients, paths of travel and signage are governed by Australian Standards, by the Building Code and by planning approvals, and differ by jurisdiction, facility type and approval. This guide deliberately does not reproduce dimensions, gradients, bay sizes or tolerances: take those from the governing standard, the approval and the project design. Information is current as at October 2026.

• Australian Standards and Austroads guidance for pavement design, including design for static and point loading and for concrete pavement jointing and load transfer, referenced in §03 and §07. Design for a particular hardstand depends on the governing load case, the subgrade and the intended use, and is engineering work for the project; the governing document is the project design and specification.
• The Australian Standard for off-street parking and the Australian Standard for design for access and mobility, together with the Building Code and the planning approval for the facility, which set the bay dimensions, aisle widths, turning paths, accessible parking requirements, gradients, paths of travel and signage referenced in §09. Requirements differ by facility type and jurisdiction and are commonly varied by the approval.
• State and territory environment protection requirements for stormwater quality from paved areas referenced in §05, including treatment of hydrocarbons and sediment from vehicle standing areas, together with any water sensitive urban design requirements imposed by the local authority. Sourced in full in our guides to environmental approvals and permits and construction environmental management plans.
• Related TenderBuilt guides carrying the primary-source detail referenced above: road construction and resurfacing tenders, asphalt supply, production and laydown, concrete supply, placement and testing, pavement stabilisation, testing and conformance, culverts, headwalls and drainage structures, and line marking, signage and roadside furniture.