J Weir Masterworks, Inc. is a general contracting and design firm. JWMW represents a new level of attention to detail, client satisfaction and project execution. JWMW is the culmination of 4 generations involved in design and construction. Our history has done more than just create structures to work and live in; it has built lasting relationships. 


  • healthy client relationships built on honesty, integrity and transparency
  • accurate, efficient coordination of sub-contractors and materials
  • contextual design with sustainable material applications
  • on time and on budget project management
  • precision tooling and superior craftsmanship
  • clean and safe project sites displaying professionalism 


JWMW builds award-winning projects with a hand-picked team of over 35 expert sub-contractors. We developed this team over decades to execute meticulous details. We manage and build permitted projects from both designers and architects. With over 20 years of professional architectural background, from entry-level to high-end projects, we understand when the architect needs a phone call for a site visit, the client needs to be involved, or if an RFI should be sent out. We understand when and how to solve details in the field with the spirit of the project’s design staying intact. That is important. While we specialize in contemporary projects, we are versed in many architectural styles. Our team relies heavily on cost analysis, value engineering and technical budgeting as we collaborate with the design team to achieve a buildable plan. We craft the client and architect’s vision with a team process. 

JWMW also provides design-build services that have proven invaluable for past clients. We design in our studio and often the same two hands build in the shop or field. We operate like a custom furniture builder and adopt that same commitment to the entire home. We take a project from conceptual design with illustrations, right into construction documentation, permitting and construction. We work with one point of contact with the client, start to finish. This allows us to move fast, stay on schedule and manage costs and changes instantly. We are involved until the last coat of paint on your project dries! We can create a time and financial savings for our clients with a packaged designer-led build approach.

JWMW carries a general “B” license and is incorporated.  We have workers compensation on all employees, with a minimum 2 million dollar liability policy on our projects.  


1595 Thompson Blvd., Ventura, CA 93001

Hours – Monday-Friday 9am – 5pm