3D Rendering From House Plans: Turning Your Drawings Into Photoreal Images

What rendering a set of house plans actually produces

'Rendering house plans' can mean four different things, and the first job is to decide which you need. Each is produced from the same 3D model, so the model is built once; sets of five images or more are priced as a package.

• An exterior render: the house from the street or the garden, with real materials, landscaping, sky and neighbours. This is the image used to sell a home, pitch for a tender or support a planning application.
• An interior render: the kitchen, living room or main bedroom from inside, with the finishes, furniture and natural light the plan implies. This is what settles kitchen and colour decisions before they are built.
• A furnished 3D floor plan: the floor plan drawn as a coloured, furnished, slightly tilted view, so someone who cannot read a 2D plan understands the layout in seconds.
• A planning view: a street-level image, sometimes composited into a photograph of the actual site, that shows a council or a neighbour how the house sits in its context.

Which drawings a rendering studio works from, and what each one is used for

The quality of a render is set by the drawings behind it, because the model is built to what the drawings say. Each drawing does a specific job. The floor plan gives the footprint, the room layout and the wall thicknesses. The elevations give the heights, the roof form, the window positions and the facade materials; we need every elevation that faces open space, even the ones that will not be in the picture, because the roof and the side windows show. The site plan gives the block, the setbacks, the driveway and the north point. A section fixes ceiling heights and roof pitches, a window schedule fixes glazing sizes, and the landscape plan tells us what grows where.

The format matters less than people expect. PDF is fine for most houses. DWG, Revit, ArchiCAD and SketchUp files are faster for us and reduce the chance of a mis-read dimension, so send them if you have them. Builder's brochure plans, with a facade drawing and a dimensioned floor plan, are enough to model the exterior of a standard design. Hand-drawn concept sketches work for early-stage images as long as the overall dimensions are written on them.

The north point is the drawing most often missing. In Australia the sun sits in the northern sky, so a north-facing facade is lit and a south-facing one is not, whatever time of day we choose. The north point tells us which case we are in, and we pick the time of day and the camera to show the house fairly rather than flattering it with light it will never get.

From plans to render: the six stages

The steps above are the same for a single exterior and for a full marketing set. Two of them deserve explanation. The draft render is not a grey model or a wireframe: it is a near-final image with the materials and lighting in place, so your feedback is about the picture you will actually receive. And the revision rounds are for mark-ups on that draft; a change to the design itself, such as moving a window or adding a room, means changing the model and is quoted separately.

A typical set is delivered in 5–7 business days from the approved quote when mark-ups come back within a day of each draft; each revision round adds the time it takes you to send notes and us to apply them. A single furnished floor plan is faster, usually about three business days. Rush delivery in 48–72 hours is possible with a surcharge. The turnaround guide sets out each stage with the time it takes.

Choosing the view from a plan

A plan has no camera in it, so the view is a decision, and it is the decision that most affects how good the image is. For an exterior, the default is a three-quarter view from the street that shows the entrance facade and one side, taken from a height a person could stand at. It reads as a photograph because it is framed like one. A straight-on elevation view is useful for comparing facade options but feels flat as a marketing image. For a house on a sloping block, the view is taken from the downhill side so the house reads at its full height.

For interiors, the view is found on the plan by looking for the longest sightline: usually from the entry of the living area looking toward the kitchen and the garden, so one frame shows the open plan, the island and the outlook. Tell us what the image has to do and we propose the camera; you adjust it at the draft.

Showing the house on the actual block, and in the real street

A house rendered on a flat, generic lawn is a house on nobody's block. With the lot plan or the survey, the model is placed with the correct setbacks and driveway side, and with the slope and any cut and fill if the survey shows levels. Neighbours are built from the survey, your site photographs and aerial imagery, so the context is recognisable without being photographic.

Where the context has to be real, the model is composited into a photograph taken from the street. That is the photomontage used for development applications, where the question is how the house changes the street rather than how it looks in isolation. It needs a site photograph with a known camera position, and it is quoted per project.

Turning a colour selection sheet into materials

Plans rarely carry the finishes. The external colour selection sheet does, and it is the document that makes the difference between a render that looks like the house and one that looks like a house. Send the brick or cladding product and colour, the roof material and colour, window frame colour, garage door, gutters and fascia, render colour if any, and the driveway finish. We model the actual Australian products rather than approximate them, so the brick coursing, the roof profile and the cladding board width are right.

If the finishes are not chosen yet, say so. We render a sensible scheme for the draft and you use the render as the tool for choosing: swapping the brick, the roof colour or the cladding at the draft stage is a revision, and comparing two or three schemes side by side is quoted as variants of the same image.

The floor plan deserves rendering too

Most people who search for rendering house plans want the facade. The furnished 3D floor plan is often the more useful image for the decisions a build involves, because it is drawn to scale from the same plan with furniture at real size, and it answers the questions a 2D plan hides: whether the lounge takes a three-seater and a dining table, which way the doors swing, how far the kitchen is from the alfresco. For a two-storey home, each level is a plan. From A$445 per plan, about three business days.

What it costs to render a set of house plans

Per image, at our published prices, ex GST: exteriors from A$445, interiors from A$345, furnished 3D floor plans from A$445. A single-house set of one exterior, one interior and one floor plan therefore starts at A$1,235. A day and a dusk exterior, two interiors and a floor plan adds up to A$2,025 at single-image prices, before the package pricing that applies from five images. Facade and colour-scheme variants of a modelled design are priced as variants, not as new images.

What moves the price up is size and complexity, not the number of pages in the plan set: a large two-storey home with a pool and extensive landscaping takes longer to model than a single-storey courtyard house. Every factor is set out, with worked examples, on the 3D rendering cost guide.

Doing it yourself, software, and when a studio is worth it

Plenty of people searching for this want to render their own plans, and for some purposes that is the right call. Free and low-cost home-design tools, and the 3D views in SketchUp or the design software your builder uses, will give you a recognisable massing model and a rough idea of the layout, and that is enough for an early conversation about room sizes. What they do not give you, without a lot of time, is the actual Austral or PGH brick, the actual COLORBOND roof colour, the block and its neighbours, the sun for your orientation, a camera that reads as a photograph, or a 4K file for a brochure or a hoarding.

The practical test is what the image has to do. If it is for you alone, to check a layout, a rough model is fine. If it has to persuade someone else, a buyer, a bank, a council or a partner who cannot read plans, it needs to look like the finished house, and that is what a studio working in 3ds Max and Corona Renderer from your drawings produces.

Problems with plans that cause revisions, and how to avoid them

In our experience, delays on house renders usually trace back to the drawings rather than the rendering. The usual ones:

• No dimensions on the plan, or dimensions that do not add up across the elevations. We build to the numbers, so missing numbers become questions.
• An elevation missing for one side. Even if that side will never be in the picture, its roof and windows affect the model.
• Plans that change after the draft. A window moved after the draft is a model change, not a mark-up. Lock the design before briefing if you can.
• An old revision sent by mistake. Check the revision cloud and date in the title block before sending.
• No north point and no site plan, so the orientation and the block have to be assumed.
• Finishes described rather than specified. 'White brick' is a guess; 'Austral Bricks Bowral 76 Chillingham White' is a product. The briefing guide covers the finishes schedule in detail.

Who renders house plans, and why

Home builders render standard designs as facade ranges for brochures and display villages; architects and building designers render custom homes for client approval and development applications; draftspeople add a render to extension and new-home packages; and real estate agents commission a facade render and a floor plan for knock-down-rebuild listings. The house rendering page shows what the finished images look like for each of these, with projects from Sydney, Melbourne, Brisbane, Perth and Adelaide briefs.

And homeowners render their own plans, often for the most practical reason of all: a render is far cheaper than discovering after the slab is poured that the facade chosen from a small drawing is not the one they wanted. The briefing guide has a checklist of what to send.