Construction Estimating Tool Development

I need a desktop application estimating tool tailored for the construction industry. The tool must include:

- Cost calculation
- Material estimation
- Plug in figures straight into excel

Ideal Skills and Experience:
- Experience in developing desktop applications
- Background in construction estimation tools
- Strong programming skills (preferably in C#, Java, or Python)
- Knowledge of user-friendly UI/UX design

Please provide samples of similar work.