Renovated or built from the ground up. Tenant-ready, fast.
I'm Jonas Moros, founder of JEM Builders. Whether it's transforming an existing property or developing a new building from dirt to doors, I personally run every project — and I personally answer every email.

Ground-Up Development
New buildings, from dirt to doors.
4767 Iberia in the Dallas Design District — a 16,800 SF two-story office/flex building developed from the ground up in about 6 months: site work, structural steel, concrete, and full finish-out.


Recent Result
50,000 SF, tenant-ready in about 6 weeks.
400 Bishop Ave in Richardson — multiple light industrial buildings taken from rough existing conditions to fully renovated: new roof, storefront and windows, polished concrete floors, LED lighting, exterior repaint, landscaping, and full interior build-out.


Track Record
From ground-up builds to full-site redevelopments.



What I Handle
One contractor, start to finish.
- Ground-up construction and new development
- Demolition and site preparation
- Roofing, exterior repaint, and storefront/windows
- Polished concrete floors and LED lighting
- In-house concrete and structural steel
- Bathrooms, interior paint, and full build-out
- Landscaping and final tenant-ready delivery
Why owners email me directly
No layers, no handoffs. I superintend every job myself and oversee quality control personally — with in-house concrete and steel crews for the schedule-critical trades. When you email, you reach the person who will actually run your project.
Have a property that needs work?
Tell me about it. I'll walk the site, give you a straight answer on scope and schedule, and deliver it tenant-ready.
Email jonas@jem-builders.com