Another block of downtown Dallas — the street level of the Mercantile Building — is being prepared for new retail tenants, including a long-sought-after grocery store.

The Urban Design Peer Review, a group that works with the City of Dallas Plan Commission, has been shown plans that include a Royal Blue Grocery on Ervay Street. And there could be more. Marketing and leasing materials for new retail space at the Trammell Crow Center at 2000 Ross Avenue also include a Royal Blue Grocery.

Austin-based Royal Blue has six stores in its hometown. The stores aren't all the same size and vary based on the building and neighborhood. They can be located near one another. There are two on Third Street in Austin. Royal Blue partnered with Dallas investors Zac Porter, Emily Ray-Porter and Cullen Potts in 2015 for its first Dallas store in Highland Park Village. The same group is working on additional stores here.

The grocery is shown on plans in the Mercantile Building storefronts on the corner of Ervay and Main streets. The Peer Review plans from Droese Raney Architecture mention the possibility for some outdoor seating. The owners of Royal Blue Grocery declined to comment.

In Austin, no two Royal Blue Grocery stores are identical. The Highland Park Village store serves breakfast, lunch and dinner amid aisles of food, beverages and household goods including mainstay grocery departments such as produce, bakery, butcher shop, deli, floral, beer and wine. It has an in-store café.

Downtown Dallas has more residents now than it did when a grocery store on Jackson Street failed. The City of Dallas invested more than $600,000 in Urban Market, which closed in 2012 after struggling for seven years. A year later, three friends formed a partnership to open Urban Orchard Market, but it soon closed.

There are more options for food and groceries downtown with a renovated Dallas Farmers Market and several 7-Eleven stores opening in recent years. Not far away, in Uptown, Whole Foods Market opened in 2015 and next year a Tom Thumb will open in the Union Building under construction across from the Perot Museum. H-E-B's Central Market has plans for a store in the former Albertsons/Minyard Sun Fresh Market. But none of those are within walking distance for central business district residents on a hot summer day.

Last year, Main Street added a second department store when Forty Five Ten opened across from Neiman Marcus. Downtown's resident population now exceeds 10,000 within the freeway loop and more than 55,000 in a 2.5-mile radius of downtown, according to Downtown Dallas Inc.

Twitter: @MariaHalkias