Frame design. Some floor plans have several frame options. Adding or removing a bent can alter the number of total timbers by as much as 20 to 30 percent, greatly changing the cost per square foot

Wood Quality. Moisture content and growth pattern greatly affects the strength and appearance of timbers. Choosing between green or seasoned wood, old growth or second growth, kiln dried or reclaimed wood markedly affects the price of your frame. The more stable the wood (drier, denser) the less the joinery will open over time, and the less checking (cracking) you will see. In a well-built timber frame, shrinkage and checking are aesthetic rather than cost or structural issues.

Species. Timber frames employ a variety of species, each with its own advantages and disadvantages. Some are available in longer lengths, some offer greater strength in a smaller dimension, some are considered more attractive or aesthetically interesting. Spruce, cedar and pine offer a light finish, while oak, walnut and more exotic woods are darker. Reclaimed materials offer a rustic feel while newly cut timbers are appropriate for contemporary structures. Discuss the types, pros and cons, cost and availability with your project coordinator.

Frame Detailing. Added embellishments on a frame such as drop pendants, carvings or other specialty work will increase the price based on intricacy and time involved.

Finish. Each choice - rough sawn wood, sanded, oiled finish, hand hewn, adzed, sand blasted, nylon brushed, stained, colored washes - greatly determine the look and the cost of the project.

Site Requirements. Like any home construction, accessibility to your site can affect cost. Can a truck and trailer drive right to your site, or will there be extra handling? Can a crane be brought in?

The Rest of the House. You will make myriad choices that will affect the finished square footage cost of your home. For example, stucco and slate roofs are more expensive than siding and asphalt shingles.

Hybrids - part timber frame, part stick built - may reduce the overall project cost. Cons.ider timber framing the public areas such as great rooms and living areas while using SIPs to build the wings.