The title diagram is enough for an early sense of the site, but it is not enough to set out boundary-critical work. If the job depends on the exact position of a boundary, easement, setback, foundation, pool shell, retaining wall, shed, garage or extension, stop before you rely on the diagram alone and get survey certainty.
For trades and designers, the real question is not "what does the diagram show?" It is "can I quote, draw, sign or build from this document without creating a problem later?" Sometimes yes. Sometimes absolutely not.
Why this matters before the job starts
A Record of Title with diagram is often the first document a builder, designer or subcontractor sees when a client asks whether a project will fit. It shows the registered title, the legal description, the parcel shape and the diagram attached to the title record.
That is useful. It tells you what land you are dealing with and whether obvious registered interests, such as easements or covenants, need closer attention before you spend time on a quote.
But a title diagram is not a site set-out. It does not put pegs in the ground. It does not confirm where an old fence actually sits. It does not measure the clearance from an existing wall to the legal boundary. It does not prove that a proposed slab, retaining wall or pool shell is inside the correct line.
That difference matters because the person who gets blamed is rarely the person who gave the casual site instruction. The builder gets asked why the quote did not include redesign. The designer gets asked why the consent drawing assumed the fence was right. The contractor gets asked why the crew arrived before the boundary question was settled.
Where the title diagram is usually enough
The title diagram is useful at the early screening stage.
Use it when you need to:
- Confirm the legal description of the property.
- Understand the general shape of the parcel.
- Check whether the title refers to easements, covenants or other registered interests.
- Compare the apparent site layout with the legal parcel at a high level.
- Decide whether more documents are needed before quoting properly.
For example, a landscaper pricing a garden refresh, a fencing contractor doing an early phone estimate, or a shed company checking whether the lot appears wide enough may sensibly start with the Record of Title and diagram.
The key word is "start". The diagram can tell you that a boundary question exists. It should not be treated as the final answer when millimetres or small tolerances matter.
Where a measured survey becomes the safer line
A measured cadastral survey becomes important when the build decision depends on the exact boundary position on the ground.
That includes work such as:
- foundations close to the boundary,
- a garage, shed or sleepout near the side yard,
- a pool or pool fence near a boundary,
- retaining walls,
- boundary fences where there is already a disagreement,
- decks or extensions close to setback limits,
- driveways or services near an easement corridor,
- any job where the client says "the fence is basically the boundary".
The title diagram may show the parcel and dimensions, but the surveyor connects the registered boundary information to the physical site. That is the difference between reading the map and setting out the work.
If the job needs exact position, a licensed cadastral surveyor is the person who can re-establish or confirm the boundary in the field. A builder or designer can read documents and identify risk, but they should not pretend a title diagram is a measured site survey.
The real consequence if you get it wrong
The consequences are practical before they are legal.
A neighbour may object if a structure crosses or crowds a boundary. A client may refuse to pay for redesign if they think the professional should have flagged the issue earlier. A council may question setback, site coverage or easement clearance if the drawing relies on a weak boundary assumption. A bank, buyer or solicitor may raise the problem later when the property is sold or refinanced.
For boundary-adjacent work, the cost is rarely just the survey fee. The real cost can be:
- redesign after the quote has been accepted,
- a delayed consent package,
- a crew booked before the set-out is ready,
- materials ordered for the wrong footprint,
- a dispute about variation costs,
- remedial work if something has already been built in the wrong place.
This is why the title check belongs at the front of the workflow, not after the client has approved the pretty version of the plan.
A practical checklist for builders and designers
Use this order before relying on a boundary assumption.
1. Before you quote
Order or request a current Record of Title with diagram.
Check the legal description, parcel shape, dimensions, title diagram and registered interests. Look for easements, covenants and notices that may affect where work can go.
If the job is nowhere near a boundary and the scope is low risk, the diagram may be enough for early pricing.
If the job is close to a boundary, price the quote with a clear allowance or exclusion for survey confirmation.
2. Before you draw
Do not draw boundary-critical work from a fence line, hedge, retaining wall, driveway edge or client sketch.
Compare the title diagram with site photos, aerial imagery and any existing survey or architectural drawings. If the proposed work relies on exact clearances, request a cadastral survey or survey input before the drawing becomes the design everyone believes.
3. Before you sign the contract
Make the boundary assumption visible.
If a measured survey is required, say so before contract signing. If survey confirmation may change the design, timing or cost, put that in writing. This avoids the worst conversation later: "we thought that was included."
4. Before you mobilise
Do not send a crew to set out boundary-critical work from the title diagram alone.
If the work is near the legal boundary, an easement or a tight setback, confirm that the survey information has been resolved and the person setting out the work has the right basis for doing it.
What the title shows and what it does not
A Record of Title with diagram can show the current registered title, legal description, ownership details, parcel diagram and registered interests such as easements, covenants, mortgages and notices.
It does not replace a measured site survey. It does not confirm fence position. It does not show every council planning control. It does not give legal, surveying, engineering, planning or building advice.
Setbacks, height rules, site coverage and planning controls come from council planning documents and consent requirements. The title helps identify the parcel and registered interests those checks relate to. It is one layer of the decision, not the whole decision.
The simple rule
Use the title diagram to screen the job. Use survey certainty before boundary-critical decisions.
If a mistake would only affect an early conversation, the title diagram may be enough. If a mistake would affect the quote, consent drawings, contract price, set-out, mobilisation, or a structure near the boundary, do not rely on the diagram alone.
For regular title checks before quoting or design, see our trade page for builders, designers and property professionals: title checks for trade.
FAQ
Is a title diagram the same as a survey plan?
No. A title diagram gives useful spatial context for the property, but a cadastral survey plan contains the detailed survey information behind the parcel. A field survey connects that boundary information to the actual site.
Can a builder rely on the fence as the boundary?
No. A fence can be close to the boundary, but it can also be wrong. Fences move, get replaced, or follow old occupation lines. Treat the fence as a site feature, not proof of the legal boundary.
When should I ask for a survey before building?
Ask before the design or contract depends on the exact boundary position. That includes foundations, sheds, pools, retaining walls, garages, decks, extensions, easement-adjacent work and any job with tight setbacks.
Does the Record of Title tell me council setback rules?
No. Setbacks and planning controls come from council planning documents and consent requirements. The Record of Title helps identify the legal parcel and registered interests that those other checks need to be measured against.
What should trade clients order first?
Start with the Record of Title with diagram to identify the property and spot registered interests. If the work is boundary-critical, add the relevant survey plan and get cadastral survey input before relying on exact positions.
General information only. Certificate of Title NZ provides property record search and document retrieval services. We do not provide legal, conveyancing, financial, settlement, planning, surveying, engineering, building or due diligence advice. Always consult a qualified professional before acting on property information.
