One of Helena's oldest downtown neighborhoods is in a pinch, hemmed in by three of the city's busiest streets and fastest-changing commercial districts.

Tires from a local garage sit piled in the alley behind a well-kept home. Four houses down, the activity at a local textile shop contrasts with the pleasant pace of the neighborhood.

The Jackson Street district, established in the mid 1880s, traces its roots back to the city's heyday, a time when buggies, not cars, navigated nearby streets.

Over the years, however, this working-class neighborhood has become the poster child for challenges facing Helena's historic districts and others like them across the country.

Paul Putz, city-county historic preservation officer, said the changes closing in on this and other early Helena neighborhoods raise fundamental questions in how the city's core will grow in the future. The more Helena expands and the older it becomes, the more urgent the solutions sought by residents become.

"It's kind of a natural progression of things for the city's historic core to take a look at how it wants to change and how it wants not to change," Putz said. "I think people are looking at the next phase of investment, and they've seen how, around the country, the active real estate market has affected older neighborhoods."

Modest property values make it lucrative for buyers to purchase small homes in older neighborhoods, tear them down and erect larger ones. In some cases, commercial operations have removed the homes entirely, replacing them with paved parking lots and new businesses.

Here in this neighborhood, the commercial encroachment is easy to see. The alley between the businesses facing Last Chance Gulch and the homes facing Jackson Street is a fine line that residents would like to see formally defined by the city.

But getting that protection has been difficult, even as the threat of encroachment continues to grow. Beyond the budding lilacs and flower gardens, the steady drone of traffic reminds residents of the intrusion they feel they're constantly trying to keep at bay.

Melisa Kaiser-Synness, a resident of the Jackson Street neighborhood, praised the local preservation commission and its volunteers for the support they have offered residents in recent years. It has, she said, been a beneficial relationship.

But as time goes on and the pressures facing her neighborhood increase, she would like to see more understanding from city staff when it comes to preservation issues. That, she believes, would prevent animosity from dividing residential and commercial neighbors.

"Yes, we chose to live within walking distance of movies, restaurants and businesses, but we'd like the alley to be the definitive line between the homes and the businesses. We would love to see that conversation get put down a little more officially so we can prevent potential acrimony."

Most of Helena's older neighborhoods face similar issues. Ten blocks to the south, State Street remains one of the city's oldest districts. But now infill projects have seen vinyl-sided four-plexes rise next to historic homes. The new additions, which residents believe are visually out of place, threaten to shift the fragile balance of the neighborhood's once historic appeal.

Elsewhere in the city, several historic homes were demolished to make way for Walgreens, a new drug store on Montana Avenue that's devoting one city block to its business. In the Rodney Street area, at least two older homes have been razed and replaced with large, modern ones.

Chere Juisto, executive director of the Montana Preservation Alliance, said the pressures don't promise to vanish any time soon. While homeowners are working to take an active stand, she said the city has some responsibility to help.

Juisto believes city officials could aid the residential cause by strengthening its city ordinances. Setting design guidelines in certain neighborhoods would help, along with establishing demolition moratoriums.

"Every year, the residents have to rally to prevent another effort to turn yards into a parking lot or establish a business," she said. "There are ways to educate people, as well as put more control in the ordinance so the community has more say over that sort of thing."

Sharon Haugen, community development director, said the city is currently updating its growth policy. When finished, the document will likely include certain design standards and set the foundation for neighborhoods to hammer out focused protections.

While the process is slow, Haugen said, it's moving forward nonetheless and the city is working to include as many voices and views as possible.

"We would encourage that everyone get involved in that conversation," Haugen said. "That, indeed, is how we can start creating the vision of what Helena should look like."

The wants and needs involved with planning a vision for the city may be as diverse and complex as the people who call it home. Haugen touched on several current issues including walkability, infill development, entryway corridors, building densities, height and design.

Some cities have voluntary design standards. Others have mandatory standards.

The city, Haugen said, is a growing entity, and current plans could set long-term trends.

"Do we want the old and the new side-by-side to show that the community is continuing to prosper?" she said. "That's also in this mix, and you do have some property owners who want to bring other people into their neighborhoods."

Jackson Street resident Kaiser-Synness and her husband live in a house built 125 years ago by the architect who designed the Power Block and the Original Governor's Mansion, among others.

Their own neighborhood dates back to the days of trolleys and wagons and a belief in a walkable community. Even as the city grows, Kaiser-Synness hopes her district can find a way to maintain its charm.

"Those streets have been platted for 125 years," Kaiser-Synness said. "It was all really well-designed early on. But it's fragile at this point. We feel if people understand better what it could be, or how it could be maintained, it would be a positive thing for our city."

Reporter Martin Kidston: 447-4086 or mkidston@helenair.com