How to read house construction plans

The following hyperlinks (Plan 1 - Plan 5) each open a web page that contains a plan that is overlaid with an image map. By moving the cursor over different parts of the plan you will be shown a brief explanantion of that particular part of the plan. A more indepth explanation is given when you click on the plan.

Plan 1: Floor plan

A floor plan is an overhead view of the completed house (with the roof removed). You'll see parallel lines that scale at whatever width the walls are required to be. Dimensions are usually drawn between the walls to specify room sizes and wall lengths. Floor plans will also include details of fixtures like sinks, water heaters, furnaces, etc. Floor plans will include notes to specify finishes, construction, methods or symbols for electrical items.

•   Move the cursor over the floor plan to magnify it.
•   Click here to see a larger version of the plan, complete with explanations
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Plan 2: Site plan

Site plans are drawn to show the location of a building on the land that it will be built on. It is an overhead view of the construction site and the building as it sits in reference to the boundries of the lot. Site plans should outline location of utility services, retaining walls, setback requirements, easements, fences, location of driveways and walkways, and sometimes even topographical data that specifies the slope of the terrain.

•   Move the cursor over the site plan to magnify it.
•   Click here to see a larger version of the plan, complete with explanations
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Plan 3: Sub-floor Plan

The sub-floor plan gives details of how this area will be constructed and how services will be arranged.

•   Move the cursor over the sub-floor plan to magnify it.
•   Click here to see a larger version of the plan, complete with explanations
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Plan 4: Elevations

Elevations are a non-perspective view of the house. These are drawn to scale so that measurements can be taken for any aspect necessary. Plans include front, rear and both side elevations. The elevations specify ridge heights, the positioning of the final fall of the land, exterior finishes, roof pitches, fence locations and other details that are necessary to give the house its exterior architectural styling.

•   Move the cursor over the elevations drawing to magnify it.
•   Click here to see a larger version of the plan, complete with explanations
.

Plan 5: Section

A section cuts through the dwelling and the location of this 'cut through' is noted on the floor plan. It describes how the building will be constructed and discusses how the internal finishes are to look. Sections are used because they explain certain conditions in more detail.

•   Move the cursor over the section drawing to magnify it.
•   Click here to see a larger version of the plan, complete with explanations
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Sponsors

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Further reading

Build your own home.  A book by George Wilkie.
 

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