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How Bilby works

Getting started with the site planner

Make a buildable plan easier to discuss

Use the site planner to explore house position, access and outdoor layout, then inspect how committed changes affect quantities and budget. The result is a planning sketch with cost assumptions. It does not certify boundaries, permission or construction feasibility.

Start with a plot and house

Open your project’s Site Plan with its plot or coordinate location. Choose a catalogue house or create a custom house. Check the boundary and terrain first. Missing boundary or height data limits warnings and estimates; it is not evidence of unrestricted space. Browser drafts and account projects have different save destinations, so read the save status.

Place, draw and edit

  1. Open the house control and choose Add object if it is not placed. Set options, choose Add to plot, then click or tap the map. Select an existing house to edit it, drag to move and use rotation to turn it.
  2. Check dimensions, orientation and placement warnings. Custom houses can change dimensions; supplier models follow their defined geometry. Review boundary distances and collisions even when the drawing looks plausible.
  3. Add a driveway or path. Choose material and width, choose Add to plot, click points along the route and select Complete. Undo last removes a point; Cancel abandons the active draft.
  4. Under Ground, choose the lawn or preparation type, set its size, choose Add to plot and place it. Resize its area with the editing controls. Add a patio, pool, secondary building or garden object with Add object. Place it and open Edit object to change options.
  5. A new timber deck starts connected across the rear house wall when a house with known dimensions is placed. In Terrace placement, keep Connected to house and use House side, width and depth to adjust it; Add to plot confirms that position without another map click. To place it freely, select Freestanding before Add to plot, then click the map. Without a placed house or known dimensions, decks start freestanding.
  6. Apply changes in the object editor. Unapplied edits and unfinished routes are drafts; they do not become saved cost quantities. Inspect the budget after applying.

A fictional first plan

Try a rectangular 10 × 14 m house and a straight 20 m driveway with 3 m width. The footprint is 140 m² and the simple driveway area 60 m² before overlap adjustments. Moving the house can change earthworks without changing dimensions. Changing material can change price without changing area.

Saving and recalculation

Committed edits update live calculations and are autosaved in the supported workspace. Check Saving, Saved or error feedback: a new position on screen does not prove an account save succeeded. Browser-only drafts remain in that browser until saved to an account project. The save action offers the relevant destination. Pending writes and unapplied object drafts can trigger an unsaved-work warning. Open methodology help in its indicated new tab to keep the workspace available.

When the result is unexpected

If placement fails, read boundary/collision feedback and cancel active drawing before selecting something else. If a price seems absent, apply the draft, check whether it belongs to a parent package and read missing-input warnings. Terrain-dependent stairs and grading can use disclosed fallbacks without heights. A retained-edge lawn appearance is not a priced structural wall.

Tutorial scope

Reviewed against Site Plan and its object editor on 18 October 2026. This guide describes implemented controls and saving; it requires no live project data. For legal boundaries consult cadastral evidence; actual earthworks need surveyed information and an agreed contractor scope.

The review date covers this explanation and its implemented method. Price and data dates are stated separately in the article.