Washington area housing production, prices and mortgage interest rates are still climbing, according to Micheal Sumichrast, chief economist of the National Association of Home Builders.

Sumichrast, a Potomac resident who analyzes housing activity and trends throughout the country for NAHB, took a close look recently at the Washington metropolitan statistical area and reported:

Production. Building permits for the first months of 1977 are 48 per cent above the level of last year; 14,044 new units compared to 9,462. This year, permits are nearly three times more than the permits issued in the first seven months of 1975 (5,557, an all-time low).

A record share of permits has been issued in the Virginia area: 63 per cent. Of the area total, 45 per cent of the permits were issued in Fairfax County (6,276).

The Maryland area usually has accounted for nearly one-half of the permits issued. However, since the sewer moratoria, the Maryland share has been declining. Now it is only 28 per cent.

This low level of activity in the Maryland area has helped to push home prices to a new high, Sumichrast contends. In Montgomery County, the demand for new housing is about 6,000 units annually. In the three year period - 1974, 1975 and 1976 - Montgomery County produced only 5,811 units. This year production is up but the year will see fewer than 3,000 new units built in Montgomery.

The same situation exists in Prince George's County, where the first seven months' permits totaled 1,936, compared to 1,449 last year. In previous years the first seven months' production varied between 3,000 and 9,000 units.

Unable to build in Maryland, because of the sewer moratoria, some builders moved into Virginia. In addition to the high production level in Fairfax County, other counties have started to pick up.

Permits in Prince William County for the first seven month ar up to 1,175, three times the production during the same period in 1975; Loundoun County is hitting the 400 unit level; Arlington and Alexandria have issued clos to 1,100 permits so far this year and Falls Church is up to 112 units, the highest seven months they have had in ten years.

Some builders have also expanded their Maryland markets to the Frederick area, Howard County and Annapolis. The Washington housing market is no longer synonymous with the Standard and Metropolitan Statistical Area boundaries - it spills way over and covers probably as much as twice the area designated by the Census Bureau.

Prices: Average sales price of existing homes in Washington came close to $70,000 in June - a 6 per cent increase since January.

The average sales price of new homes in the Washington SMSA jumped to $75,100 from $69,100 in May. The second quarter shows an increase of 8 per cent over the first quarter.

In the past three years the average price of new homes sold in the Washington area increased as follows (second quarter comparisons):

In the past three years the average price of new homes sold in the Washington area increased as follows (second quarter comparisons):

1976 to 1977, 2.6 per cent

1975 to 1977 28.0 per cent

1974 to 1977 47.5 per cent

Montgomery County has had particularly sharp increases in prices. From the first quarter to second quarter of 1977, the increase was at an annual rate of 15 per cent with the average price of homes sold through multiple listings at $73,000, up from $70,100 in the first quarter.

The prices in Montgomery County are 16.4 per cent above the prices of homes sold in Northern Virginia (or over $10,000 per house).

Interest Rates. Money is still available but rates are generally at 9 to 9 1/4 per cent levels, said Sumichrast.

There are no loans available under 9 per cent in the conventional mortgage market. The FHA-VA interest ceiling is 8 1/2 per cent but the buyer has to pay one discount point (1 per cent of the loan amount) and the lender may pay even more to make it relative to market yield.