385 teenagers or 15.7% are between 10 and 19. Of the adult population, 290 people or 11.8% of the population are between 20 and 29 years old. 326 people or 13.3% are between 30 and 39, 448 people or 18.3% are between 40 and 49, and 323 people or 13.2% are between 50 and 59. The senior population distribution is 220 people or 9.0% of the population are between 60 and 69 years old, 124 people or 5.1% are between 70 and 79, there are 54 people or 2.2% who are between 80 and 89, and there are 15 people or 0.6% who are 90 and older. , there were 862 private households in the municipality, and an average of 2.6 persons per household. there were 400 single family homes (or 84.7% of the total) out of a total of 472 inhabited buildings. There were 27 two family buildings (5.7%), 7 three family buildings (1.5%) and 38 multi-family buildings (or 8.1%). There were 553 (or 24.8%) persons who were part of a couple without children, and 1,283 (or 57.4%) who were part of a couple with children. There were 93 (or 4.2%) people who lived in single parent home, while there are 15 persons who were adult children living with one or both parents, 14 persons who lived in a household made up of relatives, 16 who lived in a household made up of unrelated persons, and 28 who are either institutionalized or live in another type of collective housing. The vacancy rate for the municipality, , was 1.41%. , the construction rate of new housing units was 4.2 new units per 1000 residents. there were 926 apartments in the municipality. The most common apartment size was the 4 room apartment of which there were 249. There were 10 single room apartments and 213 apartments with six or more rooms. the average price to rent an average apartment in Märstetten was 1111.11 Swiss francs (CHF) per month (US$890, £500, €710 approx. exchange rate from 2000). The average rate for a one-room apartment was 434.00 CHF (US$350, £200, €280), a two-room apartment was about 681.89 CHF (US$550, £310, €440), a three-room apartment was about 906.80 CHF (US$730, £410, €580) and a six or more room apartment cost an average of 1679.33 CHF (US$1340, £760, €1070). The average apartment price in Märstetten was 99.6% of the national average of 1116 CHF. In