Part of a main level renovation plan, this 18x20 living room addition with a loft will be built onto a home on Martha’s Vineyard. This light-filled addition uses our Beamed Roof System (, Full Exposure Exterior Wall System (, and the Beamed Mid-Floor System under the loft area ( The lower level takes advantage of the sloping site, and can be used for storage/utilities, or an extra private bedroom or office with the addition of windows.

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Plan: 3726

Custom Addition (#3726) (455 sq ft)
Package Price: $101,000
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Plan: 0070

Gable Sunroom (#0070) (224 sq ft)
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Plan: 0073

Cross Gable Room (#0073) (396 sq ft)
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Custom Addition (#3764)

442 sq ft
Package Price: $62,000 as specified below  (from $51,500 to $62,250 depending on framing options).
For information about total costs, click here.
The standard price includes our Full Exposure Wall System, Beamed Mid-Floor System (loft), and our Beamed Roof System. The walkout basement is not included in the above pricing.

Depending on framing options you select, the price could be lower or higher. This price is valid through 2022; prices generally increase about 2-3% per year after pricing date. Walkout basements and/or garages can typically be added to any home, but are not included in our initial price (whether drawn on plans or not). Prices are based on engineering requirements of up to 90 mile per hour wind speed, up to 65 pound snow load, and low seismic activity zones. Our packages can be adapted for higher ratings; this may result in a higher price. Pricing errors on our site are rare, but a price change for your package may be required if a mistake is found.