Another contractor pulled his crew off a masonry job halfway through and left it. In July 2025 the homeowner called Ronaldo Lopez, who came up with a fix and finished it — and the neighbours still compliment the front steps. A customer that September described the same thing from the other end: a patio somebody had left as an embarrassing mess, repaired with the pavers matched so the repair disappears.
TGS Home Improvement is Lopez's company, based in Waltham and working Waltham, Newton and the villages around them. Its site describes a locally owned masonry and outdoor-living contractor with more than fifteen years behind it, and masonry is where most jobs start: front steps rebuilt and repointed, bluestone treads reset, chimneys rebuilt, retaining walls straightened, walkways laid, foundation cracks closed, stone foundations repointed.
It rarely stops there. Customers describe him painting rooms, replacing rotted garage wood, fitting new wooden stairs and work benches in a basement, tiling a marble mosaic backsplash and a fireplace surround, repairing a bulkhead, replacing windows, hanging drywall, and fitting roof water diverters to push rain away from the problem corners of a house. In August 2026 a customer with a seventy-year-old house and a hole in the side patio, where a microburst had taken out a tree, said he worked through the options with them patiently until they found the right one. In May 2026 another hired him for a job as small as one landing outside a set of deck doors, which he designed and built.
Twenty-four Google ratings average five stars, twelve of those accounts written in the last six months. What repeats is on time, cleaned up, and comes back: a customer in September 2025 wrote that he arrives when he says he will, works at reasonable cost, returns when something needs it, and leaves everything spotlessly clean. Another was fitted in within a week when a chimney turned out worse than expected ahead of a scheduled roof job.
Two things to settle. The range is very wide for one outfit, so on a large job ask which parts his crew performs itself and which get handed to someone else. And the written history, deep as it is, starts in January 2025 — several reviewers mention working with him for years, so ask for one of those customers as a reference.
For masonry, steps, chimney and patio work around Newton and Waltham — or a house that needs ten small things fixed by someone who will come back — this is a strong call. Get the scope written out job by job, and confirm his Massachusetts home improvement contractor registration before the first invoice.
