Masonry in Lexington, MA: Historic Districts, Stone Walls and Modern Homes

Lexington has four local historic districts: Battle Green, Hancock-Clarke, Munroe Tavern and East Village. They are overseen by the Historic Districts Commission, which reviews exterior changes visible from a public way and issues Certificates of Appropriateness before work can go ahead.

For masonry, that can include rebuilding front steps, changing a chimney, adding a stone wall or replacing a walkway in view of the street. If your home is inside one of these districts, plan for a review step before the building permit, and expect questions about materials. Matching the existing brick, stone and mortar color is often what the commission wants to see. Ordinary repairs that replace like with like may follow a simpler path, but the commission is the right place to confirm that.

Much of Lexington was farmland, and dry-laid fieldstone walls still run along roads and between yards. The Five Fields neighborhood, for example, was built in the early 1950s on a former dairy farm where stone walls divided the land into five fields, which gave it its name.

Old dry stone walls slump over time as frost heaves stones and roots push them apart. Resetting a fallen section uses the same stones and the same dry-laid method, which keeps the wall looking original. Where a wall is now acting as a retaining wall because of regrading or a new driveway, it may need to be rebuilt with a footing and drainage, since dry walls were never built to hold back much soil.

When resetting a wall, it helps to keep the larger, flatter stones for the base and the top course, and to batter the wall slightly so it leans back into the slope. That is how many of the original farm walls were built, and it is a big part of why they lasted as long as they did.

Lexington is known for planned modernist neighborhoods: Six Moon Hill, started in 1948 by The Architects Collaborative, then Five Fields in 1951 and Peacock Farm in 1955. These homes often have flat or low-pitched roofs, large glass walls, and simple masonry elements such as a single central chimney, low stone or brick walls and minimal entry steps.

Masonry on these homes is about restraint. A heavy granite stair or ornate brick pattern can look wrong against clean modern lines. Simple bluestone treads, plain concrete or flagstone paths and carefully matched chimney brick usually suit the architecture better. Low-slope roofs also put extra stress on chimney flashing, so a leak near the chimney on a modern house often comes from flashing rather than the brick itself.

Older Lexington homes often have large central or end chimneys, some rebuilt more than once over the years. Antique brick is softer than modern brick, so it needs a softer, lime-based mortar. Repointing an old chimney with a hard modern cement mortar can make the brick face crack and spall as moisture gets trapped.

Common issues are a cracked crown, loose top courses, failed flashing and a chimney that no longer vents anything but still faces full weather. A chimney inspection before repair tells you whether repointing is enough or whether part of the stack needs to be rebuilt.

As a rough market guide, resetting a section of dry fieldstone wall can cost a few hundred to a few thousand dollars depending on length and height. New entry steps in bluestone or granite commonly run from several thousand dollars up, and work in a historic district can add time for review and for sourcing matching materials. Chimney repointing and crown repair often fall in the low thousands, with full rebuilds above the roofline costing more.

Treat these as typical ranges only. Historic review, material matching and access all move the price. A free on-site estimate is the best way to get a figure for your home.

Start by checking whether your property is inside a local historic district. If it is, contact the Historic Districts Commission before you finalize a design. Next, ask the building department whether your project needs a permit; chimney rebuilds, steps that serve a main entrance and taller retaining walls commonly do.

Lexington also has a Historical Commission that may review the demolition of significant older buildings, so major removals deserve a call. Finally, take photos of the existing masonry before work begins. On older homes they help match materials, and they are useful for any review.