One Stop Builders is an interior design and renovation firm with an office at Northstar@AMK on Ang Mo Kio Avenue 5, in Serangoon. Established in 2010, it runs home renovations from start to finish, and can also match a homeowner with an interior designer and build a full design package around them. Its work covers metal, glass, tiling, masonry and carpentry. It offers free consultation, and it will work out a cost from the client's own drawings or ideas. Regular progress updates are given during the job, and the team checks the finished work before handover. Customers praise how the team turned a rough idea into a finished home, and how meticulous the team was with details. Several say the pricing was fair and transparent, with no pressure to buy extras. One reviewer says the team advised keeping and restoring the original terrazzo flooring, which became a highlight of the house. Others kept old marble flooring in their resale flats, which saved money and gave a vintage look. Customers say timelines were well managed, and one who has used the firm for two homes says the workmanship is good. One reviewer describes hiccups during the Covid period. Call ahead before visiting, as the office is on level 5, and the carpark entry is from Serangoon North Avenue 4.