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Hundreds of thousands of houses have been built based upon pre-drawn house plans. However, one thing is certain: the vast majority of homeowners made changes to the plan while building the home. Some of these changes may have been very minor while others represented substantial modifications. If you are interested in making changes to a plan you've found, we here at The Plan Collection hope to help you determine the best route to modify that house plan.

If you have really minor modifications...

By far the simplest and least expensive to make modifications to a house plan is through a technique called "redlining." While called blueprints, all plans today are printed on white paper with blue or black line lettering. As a result, notations can be made easily on the paper using a pencil, pen, or redline pen to indicate minor modifications.

Redlining is not suitable for major changes, but it will work for the majority of minor changes. Examples of minor modifications using redlining include:
-- Moving or resizing a door or a window
-- Changing exterior finishes
-- Changing interior fixtures or cabinet layouts
-- Removing a chimney or fireplace
-- Shifting interior partitions that have no effect on structural supports

Any sort of redlining is best done by an experienced contractor who is familiar with local building codes. Certain building authorities will not accept redlined blueprints so it is best to check with your local building officials first. While redlining can be done on any set of construction drawings, we recommend the reproducible master for redlining purposes so you can make the changes once and then make additional copies as you see fit.

I have more significant changes and want to do them locally...

If you are contemplating more significant changes and would like to have a local designer or your builder do the changes for you, then you should consider purchasing the reproducible master or the CAD file for that house plan. If your builder is willing and able to make the modifications to the plan, then this is often the quickest and least expensive option. If you prefer to work with a local designer, the CAD (computer aided drafting) file is often the best bang for the buck as it will save you time and money working with the local designer. Most knowledgeable designers today are very familiar with CAD but be sure to check first.

Some examples of more significant modfications that require either a reproducible master or CAD file and the assistance of a professional designer or experienced builder include:
-- Adding a room, garage or porch
-- Changing the foundation types if not available with the basic plan packages
-- Significant interior layout modifications
-- Adapting a plan to meet local codes or engineering requirements

Have our designer team make your modifications...

If you have found a plan on our site and would like to have our designer team help you with your modifications, just click on the "Modify this Plan" button on the plan details page to itemize your changes and submit a request for a free quote.