attics. About 53% of the total households were owner occupied, or in other words did not pay rent (though they may have a mortgage or a rent-to-own agreement). , there were 687 private households in the municipality, and an average of 2.6 persons per household. there were 296 single family homes (or 82.9% of the total) out of a total of 357 inhabited buildings. There were 24 two family buildings (6.7%), 14 three family buildings (3.9%) and 23 multi-family buildings (or 6.4%). There were 358 (or 19.8%) persons who were part of a couple without children, and 1,101 (or 61.0%) who were part of a couple with children. There were 94 (or 5.2%) people who lived in single parent home, while there are 18 persons who were adult children living with one or both parents, 4 persons who lived in a household made up of relatives, 22 who lived in a household made up of unrelated persons, and 22 who are either institutionalized or live in another type of collective housing. The vacancy rate for the municipality, , was 3.27%. , the construction rate of new housing units was 10 new units per 1000 residents. there were 720 apartments in the municipality. The most common apartment size was the 5-room apartment of which there were 176. There were 6 single room apartments and 161 apartments with six or more rooms. the average price to rent an average apartment in Pfyn was 1124.09 Swiss francs (CHF) per month (US$900, £510, €720 approx. exchange rate from 2000). The average rate for a one-room apartment was 558.33 CHF (US$450, £250, €360), a two-room apartment was about 809.86 CHF (US$650, £360, €520), a three-room apartment was about 1001.78 CHF (US$800, £450, €640) and a six or more room apartment cost an average of 1543.85 CHF (US$1240, £690, €990). The average apartment price in Pfyn was 100.7% of the national average of 1116 CHF. In the 2007 federal election the most popular party was the SVP which received 49.06% of the vote. The next three most popular parties were the CVP (11.56%), the SP (10.39%) and the Green Party (9.69%). In the federal election, a total of 625 votes were cast, and the voter turnout was 46.6%. The historical population is given in the following table: Heritage sites of national significance The Ad Fines (a late-Roman fortress), the Breitenloo (a prehistoric lake shore settlement) and