Short answer: a custom caravan order needs a controlled specification, not a collection of emails and showroom promises. Freeze the layout, component models, ratings, intended use, price and build milestones in the agreement. Require every variation or substitution to show its price, mass, delivery and warranty effect before approval. During the build, retain dated evidence linked to the order and VIN. Before final payment, verify the completed component schedule, certificates, RAV details, mass evidence and rectified defects.
Define what “custom-built” means
Custom may mean a standard layout with colour choices, a heavily optioned production model, or a one-off design. The greater the departure from a tested production specification, the more important it is to document design responsibility, approvals, ratings, service access and evidence.
The agreement should identify the legal supplier, manufacturer, exact caravan, version of every drawing and the documents that form the order. If a salesperson’s promise matters, include it in the signed specification rather than relying on memory.
Build a controlled specification
| Section | Details to record |
|---|---|
| Layout and dimensions | Dated floor plan, external length/width/height, beds, storage, doors, windows and service access. |
| Structure and running gear | Chassis, frame/wall/roof/floor systems, suspension, axles, brakes, wheels, tyres and coupling with ratings. |
| Water and gas | Tank number/capacity, pumps, hot water, plumbing layout, appliances and required certificates. |
| Electrical and energy | Battery chemistry/capacity, inverter, solar, chargers, outlets, cable protection, monitoring and certificates. |
| Appliances and finishes | Brand, model, size, colour, material and acceptable substitution rules. |
| Mass and ratings | Estimated tare basis, ATM, GTM, axle-group ratings, minimum payload and final weighing evidence. |
| Intended use | Road types, climate, trip pattern and any written performance representation or warranty limitation. |
| Commercial terms | Total price, deposit, milestones, delivery window, delay communication, variation and final acceptance. |
Set a written variation process
Changes can begin with the buyer, manufacturer or component supplier. Every change should be proposed in one place, assessed and approved before installation. Verbal agreement on a factory call is too easy to misunderstand.
| Field | What to enter |
|---|---|
| Original specification | Exact drawing, component or requirement being changed. |
| Proposed change and reason | New item, supplier and why the change is requested. |
| Price effect | Increase, credit or no change, including installation. |
| Mass effect | Estimated kilograms and effect on tare, payload, ball load and ratings. |
| Delivery effect | New milestone or delivery window. |
| Warranty/use effect | Coverage, service agent, intended-use or compatibility change. |
| Approval | Buyer and supplier names, date and revised document version. |
Do not approve a substitute merely because it is described as “equivalent”. Compare capacity, dimensions, mass, energy use, service network, controls, integration, warranty and replacement availability.
Link payments to evidence-based milestones
Milestones might include order acceptance, chassis completion, frame or body stage, fit-out, practical completion and handover. The contract should state what evidence is provided at each stage and what happens if the evidence or work is incomplete. Obtain legal advice where the deposit or staged payments are material.
A photograph is useful only if you can identify the build and understand what it shows. Ask for dated, wide and close views linked to the order or VIN, not cropped images that could belong to another caravan.
Build evidence worth retaining
- approved drawings and every superseded version
- component schedule with brands and model numbers
- photographs of concealed framing, service routing and fixing before lining
- chassis and running-gear identifiers and ratings
- water/dust or other quality-control records with methods and limitations
- electrical, gas and other required certificates from authorised people
- variation register and signed approvals
- mass calculations and final-build weighing evidence
- defect, rectification and re-inspection records.
Build photographs do not replace certification or inspection, but they can make future repairs easier and help verify that hidden services align with the plan.
Questions to resolve before the build slot begins
- Which document takes priority if the quote, drawing, brochure and email disagree?
- Who has authority to approve a variation for the supplier and for the buyer?
- Can the manufacturer substitute a component without written approval, and what counts as unavailable?
- How are credits calculated when a lower-cost item replaces the specified component?
- What evidence will show that concealed work belongs to this caravan?
- Who owns custom drawings and build records, and what copy will the buyer receive?
- How are delays reported and when can either party end the agreement?
- What access, notice and safety rules apply if the buyer or independent inspector visits the factory?
Record the answers in the agreement or an attached schedule. A friendly project relationship helps communication, but it does not replace an agreed process when a discontinued appliance, late chassis or unexpected mass increase forces a difficult choice.
Control mass through every change
Each battery, tank, appliance, panel, storage box or structural change can affect tare, payload, axle loading and tow-ball download. Maintain a running option-mass schedule. If the manufacturer cannot estimate the effect, treat the promised payload as uncertain.
Before final payment, require the completed caravan’s VIN, vehicle plate and RAV information to agree. Confirm that final weighing occurred after all factory and dealer-fitted options. The order should already state the minimum usable payload and the response if it is not achieved.
Pre-delivery and independent inspection
The supplier’s pre-delivery inspection is not the same as an inspection commissioned by the buyer. Arrange an independent inspection scope appropriate to the custom work. It may include identity, visible construction, water entry, running gear, appliances, mass evidence, and review of electrical and gas certificates by appropriately qualified people.
Record each defect with location, photograph, agreed remedy, responsible party and completion date. Recheck rectification rather than accepting a statement that the list is “closed”. Do not make final payment merely because a delivery slot has been booked.
Final acceptance file
- signed final specification, drawings and variation register
- invoice showing exact contracting entity and VIN
- component schedule, manuals and warranties
- vehicle plate, RAV record and mass evidence
- certificates for regulated work
- quality-control and commissioning records
- independent inspection and rectification evidence
- keys, codes, paint/material references and service contacts.
Take the next step
Use the live Caravan Comparison Tool to compare the proposed custom build with production alternatives, and review Caravan Payload Explained before setting the mass specification. Continue through the Buying a Caravan in Australia hub.