SDSISDSI
About Us Rapid Estimator Features Custom Software Support Services
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NOT JUST ESTIMATING SOFTWARE

Custom Windows applications built for your exact needs.

For over 40 years, SDSI has designed and developed specialized desktop software for contractors, engineers, and service companies who couldn’t find the right tool on the market.

Experienced SDSI developer building a custom Windows desktop application for a construction client with multiple monitors showing blueprints and code
OUR APPROACH

We listen first. Then we build.

01 — DISCOVER
Deep discovery workshops with your team

We learn your current workflows, pain points, and goals before writing a single line of code.

02 — DESIGN
Modern, intuitive interface design

We prototype in real Windows environments so you see exactly how it will feel to use.

03 — DEVELOP
Professional .NET / WPF / WinUI development

Clean, maintainable code with comprehensive documentation and training for your staff.

04 — SUPPORT
Long-term partnership & evolution

We don’t disappear after launch. Most of our custom projects evolve with the client for many years.

Common custom projects we deliver

We specialize in practical, high-value tools that integrate tightly with Rapid Estimator or stand alone.

Job Cost & Project Tracking

Real-time job cost tracking that pulls directly from your estimates and syncs with your accounting system. Daily production reporting for field teams.

Specialty Estimating Modules

Highly specialized calculators for niches like fire protection, curtain wall, precast, or complex mechanical systems that generic software can’t handle.

Field & Mobile Data Collection

Windows tablet and desktop tools for daily logs, T&M tracking, material receiving, and punch lists with offline capability and seamless sync.

Legacy System Modernization

We frequently rebuild or extend 15- to 25-year-old internal applications into modern, supportable Windows desktop experiences.

"SDSI built us a custom change order and T&M billing system that paid for itself in the first six months. It works exactly the way our project managers and accounting team need it to — no compromises."
— James T., Controller
Regional Mechanical Contractor, 180 employees

Have a unique requirement?

We would be happy to discuss your project. Most custom engagements begin with a no-obligation discovery call.

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