Houses are growing larger every year as Americans attempt to outdo neighbors and friends and to spend more and more income on housing “things”. Interestingly family members living under one roof had been declining for 160 years, until the slight uptick this decade**. Interesting.
The average master bedroom size in the US in 2013 was 309 square feet. This was an estimated increase of 12.4% since 2003 and 44.7% since 1983. If the trend continues master bedrooms are going to be 492 square feet in 2053.
Table 1. Average master bedroom size in feet
| USA | House Size | Square Feet | Percent of House** |
| Master | Average | 309 | |
| Master | <2000 | 231 | 14.2 |
| Master | 2001-1999 | 271 | 12 |
| Master | 3000 | 411 | 10.9 |
| Other bedrooms combined | Average | 481 | |
| Other bedrooms combined | <2000 | 261 | 14.6 |
| Other bedrooms combined | 2001-1999 | 416 | 16.8 |
| Other bedrooms combined | 3000 | 713 | 17.9 |
For 9 sizes and models bigger than a king please see my information here, 4 giant and world’s largest here, if yours is too big for your mattress fix it easy with these tips, and average dimensions in feet for each mattress size.
Scott Boyd
1. National Association of Home Builders. Source: average percentages appended on special questions appended to the survey for the NAHB Fargo Housing Market Index, June 2013.
** Based on averages of all homes in the US.
Table 2. Average house sizes growth
| 1983 | 1993 | 2003 | 2013 | |
| House size | 1725 | 2095 | 2330 | 2598 |
| Percent increase | 21.40% | 11.20% | 11.50% | |
| Bedroom size | 204 | 247 | 275 | 309*** |
| Percent increase | 21.00% | 11.30% | 12.40% |
*** Bedroom size from Table 1 and bedroom average size of room percent of the total house in 2013 is 11.8%.
So at this rate in another 40 years, master bedrooms will be 491.6 square feet, which is about 20 x 25′, or what I would consider a tiny home mansion. Maybe there will be a Monster King bed then that is 15′ wide by 12′ long.
Read about what each bed weighs on average in my article here.
