Time again to look at the current construction market activity and analyze construction costs per square foot for various types of office buildings. How much does it cost to build an office building? Below is some data from RSMeans construction cost data that we keep a close eye on in order to estimate construction costs for all of our office building projects. This data is sorted by region from the most expensive to the least expensive.
For the most common office building size, two to four stories tall, the range is from just over $130 per square foot in Winston-Salem to over $230 per square foot in New York. The spread here is largely due to the local cost of labor and regulations that allow various construction types that are allowed in low rise construction. For example, in some cases where wood frame construction is still allowed, depending on location and occupancy, this would help to keep costs lower. In areas that are restricted to non-flammable construction, price per square foot will go up.
By taking advantage of savings provided by vertical construction, you will see approximately a 4% savings in cost per square foot by increasing the stories to between five and ten stories. While one might expect a larger savings for that economy of scale, several new requirements come with the mid-rise building that are often not dealt with on the low rise buildings. For example, elevator shafts and service corridors get more complicated as well as HVAC systems.
The geographic spread in cost per square foot is identical to the low-rise data. This is still principally driven by local factors such as labor costs and local regulatory requirements.
Finally, the high rise buildings see the most economic cost per square foot. For buildings between eleven and twenty stories tall, there is approximately an 11% savings over the mid rise buildings and 15% over low rise. this is largely due to the fact that similar elevator, HVAC and service equipment requirements are required for mid and high rise, resulting in more economy of scale for going up.
Again, the geographic spread is still the same, telling us that the cost per square foot is very sensitive to geographic location. Note that over twenty stories starts getting into more unique building characteristics that will drive costs in various ways. For more information on estimating the cost of your office building during the early planning stages, contact any of us here at EVstudio and we can help scope the right size project for your pro forma.