Maybe 13 is a lucky number in this case. Lawrence home sales for the 13th month in a row have posted year-over-year gains, but the more striking fact is the improvement in almost every category real estate observers care about.

According to the new report from the Lawrence Board of Realtors, agents sold 102 Lawrence homes in April, a 45 percent increase over April 2012.

In a departure from past months, even newly constructed homes sold well. Builders sold 13 new homes, compared to just four in April 2012. To put the number in perspective, Lawrence builders had sold only 13 homes in the previous three months of 2013 combined.

The April numbers continue what has been a good start to 2013. For the year, 261 homes have been sold in Lawrence, up about 32 percent from 2012 totals and up 45 percent from same period in 2011. The number of newly built homes sold checks in at 26, up from 17 at this time in 2012 and 18 in 2011.

Sales of newly built homes will be a number to really keep an eye on. New home construction has more potential to boost the Lawrence economy than people simply buying and selling existing homes. That’s obviously because new construction involves employing people to build and houses and develop neighborhoods.

A couple of numbers that builders will keep an eye on are the number of days a house stays on the market before it sells, and the number of homes actively listed. Both numbers showed some bullish signs in the last month.

The median days on market for a home is now at 66, down from 88 in April 2012. The number of homes on the market also has fallen to 419, down nearly 32 percent from the 613 listed in April 2012. The number of newly built homes on the market is at 29, down from 56 in April 2012 and from 63 in April 2011.

As the market has picked up, there are signs that prices have too. The median selling price on homes in 2013 stands at $167,000, up 7.8 percent from the same period in 2012. It is always tough to gauge pricing trends just from this report, but at this time last year, the Lawrence real estate market was showing signs of a real price correction. Last year, at the end of April, the median home price was down about 10.2 percent.

The new numbers certainly have put new bounce in the step of local real estate agents.

“These recent statistics reflect a dramatic shift in our local market,” said John Esau, president of the Lawrence Board of Realtors.

Esau, in fact, went so far as to say he believe the market now has shifted from a buyer’s market to a seller’s market.

We’ll see what May brings: Perhaps lucky 14.

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There’s another report out that shows Lawrence home builders are slowly starting to ramp up their production. According to a new report from the city, 17 building permits were issued in April for single-family and duplex homes.

That’s the highest April number in at least five years. For all of 2013, the city has issued 59 single-family and duplex permits, which is 20 more than it issued during the same time period in 2012.

Other items from the April report include:

• For the year, the city has issued permits for $54.8 million worth of projects, up 63 percent from the same period a year ago. The $54.8 million is by far the best showing of the last five years. The average since 2009 has been about $27.5 million worth of projects.

• Apartment construction continues to be strong in Lawrence. The city has issued permits for 374 apartment units thus far in 2013. That’s the highest total of the last five years. Since 2009, the average has been about 105 units.

• Apartment construction was a big part of the $19.8 million worth of permits issued in April. Camson South — one of two apartment projects just west of Wal-Mart on Sixth Street — pulled permits for a $5.5 million project that includes 88 apartments and a clubhouse. Other large projects include phase I of the Rock Chalk Park project, including construction of the track and field stadium. Lawrence-based DFC Company pulled $6 million in permits for that project. Discount Tire also pulled a $1 million permit for work on its new store at 4741 Bauer Farm Drive, just west of the new Starbucks in that area. Several of you have asked about the timeline for the new Discount Tire location, and I do have a call into the company. I’ll let you know when I hear more.