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Modify Floor Plans to Fit Your Needs

With such a wide variety of home designs and architectural styles available to choose from, finding the house you love can take a lot of research. Once you find one that’s close, it’s tough to realize the home doesn’t exactly fit the needs of your family.

At The Plan Collection, we understand this frustration, and that’s why we offer the ability to modify home plans. This is an easy process that can include anything from changing room dimensions to adding square footage to a plan. We’ll work with designers to get the proper files updated so when you hand the plans off to your home builders, they’ve got what they need to build your new house.

If you’ve found a house that’s close, but not exactly what you need, request modifications and turn it into the dream home you’ve been wanting!

3 Ways to Customize House Plans

We offer three different levels when it comes to changing floor plans. Whether you want to change walls, add a porch for extra curb appeal, or change a four bedroom into a five bedroom house plan, we can help. Browse through our three modification options below, and when you find the house you like, click ‘Modify This Plan’ and submit the details of the changes you need.

Easy Plan Makeover — Option 1

Easy Plan Makeover — Option 1

Easiest Modify House Plans
Why Easy Plan Makeover?
  • Fastest and easiest
  • Minor changes adding notes or drawings to a plan
  • Referred to as “redlining” and accepted by most building departments
    (double check with yours to be sure!)
Examples: Examples:
  • Moving / resizing doors or windows
  • Changing non-load-bearing walls
  • Changing exterior finishes
Is this you? Is this you?
  • Many of these changes can be done by your builder or a local draftsman
  • Our designers can also work with you to make these changes
Average Cost: $395-$1000 + cost of plan Average Cost: $395-$1000 + cost of plan

Medium Plan Makeover — Option 2

Medium Plan Makeover — Option 2

Easiest Modify House Plans
Why Medium Plan Makeover?
  • Fast and Easy
  • Significant changes that require the help of a professional
Examples: Examples:
  • Adding a fireplace
  • Enlarging a kitchen or bathroom
  • Adding a room, garage or porch
  • Foundation change
  • Exterior wall framing change
  • Changing roof pitch
Is this you? Is this you?
  • Our designers are often your best and most economical resource for these changes
Average Cost: $495-$2000 + cost of plan Average Cost: $495-$2000 + cost of plan

Extreme Plan Makeover — Option 3

Extreme Plan Makeover — Option 3

Easiest Modify House Plans
Why Extreme Plan Makeover?
  • Most significant changes to the house plans
Examples: Examples:
  • Expanding the footprint >20%
  • Adding multiple new rooms
  • Changing or removing load-bearing walls
Is this you? Is this you?
  • Many of our customers with these types of changes opt for the CAD file and work with a local designer / architect to make these changes
  • Our designers are familiar with the plans and can make these changes for you
Average Cost: $2000 and up + cost of plan Average Cost: $2000 and up + cost of plan

How Do I Get Started?

Once you have chosen a plan, just click on the "Modify this Plan" button on the plan page to itemize your changes and submit a request for a free quote.
  • You will usually receive a free quote within two business days
  • If you’re happy with the mod estimate, you will then need to buy the PDF file, CAD file, or Reproducible Master of the plan
  • Our modification designers will provide one-on-one consultation once you place the order including expert advice on your requests to help you make the right decisions
  • Turnaround time is normally within 3 – 4 weeks until you receive your customized house plan

Modifications FAQ


Most modifications are feasible. We do find, however, some requests related to significantly “shrinking” the size of a house cannot be made while keeping the integrity of the plan. For example, national guidelines and local building codes require hallways, door entrances and staircases to have a constant width. As a result, sometimes it is not possible to reduce the size of a house to the extent desired. If you need a lot changed, it could be worth extending your search to see if there are any that better fit your needs.


All modifications done by our design team will still require the purchase of a PDF file, Reproducible Master or CAD file. Typically, modification fees range from $500 - $1,200 (plus the cost of the PDF file, Reproducible Master or CAD file), but modification fees can vary based upon the extent of the modifications requested. Free quote requests are usually completed within two to three business days.


This will depend upon the number and type of changes needed. Typically, once you and the designer have agreed upon the changes to be made to the plan, the designer can implement those changes in five to fifteen business days.


Find the house that meets most of your needs. Have a clear plan in mind to help understand the impact of your changes. Click “Modify This Plan” on our plan details page and submit the specifics of your changes so we can quickly respond with a quote.


Fortunately, many of our designs come with an option to purchase a plan in a right-reading reverse or mirror (type is backwards) option. If you find a house that does not come with either option, a modification can be made. The normal costs would be the price of a PDF file, Reproducible Master or CAD file plus an additional $150-$300 in modification fees.


Yes, it is possible. Many of our plans come with options to purchase different foundations. If you find a house that does not come with the foundation option you need, please let us know. If the foundation is not available, the typical cost would be the price of a PDF file, Reproducible Master or CAD file plus an additional $150-$300 in modification fees.


We work with a large network of very talented designers and architects. We will be more than happy to put you in contact with someone in your local area. Submit a request for a custom design.

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