Verified record
SG Contracting is a family-owned Waltham general contractor that says it's been in business since 2001, taking on remodeling, additions, decks, and other construction work. Houzz shows three portfolio projects under the company's name and lists a Massachusetts construction supervisor license, CSL-114317, for the business. Both public reviews on file are from 2025, and both come from subcontractors rather than homeowners: an electrical contractor (July 2025) says SG Contracting hired the company and never paid the invoice, adding that another reviewer described the same thing happening to them; a finish carpenter (May 2025) says Jon stopped picking up the phone after finishing the work, still owed money. The state's home improvement contractor registry lists SG Contracting's license, number 203160, as expired. Given the payment complaints, confirm the license is current and get a signed contract with a clear payment schedule and lien protection before any work begins — and ask directly how subcontractors on the job are being paid.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from SG Contracting, LLC. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$23,000 – $35,000
Typical remodeling project around $29,000
SG Contacting hired my company to do electrical work but did not pay his invoices. Based on the other review, this is a common practice of Jonathan's. Please be aware of this before hiring this contractor.
Did couple projects with Jon as finish carpenter subcontractor, Jon failed to pay for our work, still owed money. refused to pick up the phone and pay for work. I would recommend to be careful with him. Do not recommend as contractor!
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Certified attributes are verified against the public registry. Others are the business's own statement.
1 change recorded — last scanned Sep 19, 2026.
Renovates century-old structures5.0
Basement flood repair completed while owners traveled3.0
Custom cabinetry3.5
Fair, competitive pricing4.4