1. Proven Experience
   A good construction company should have years of experience in the construction industry, preferably in projects similar to yours. This ensures they know how to handle challenges that may arise during the project.

2. Licenses and Certifications
   The company must be properly registered and hold the necessary licenses and permits to operate in the area where the project will take place. Additionally, they should comply with local construction and safety regulations.

3. Transparency in Costs
   A quality construction company is clear about costs and provides detailed budgets with no hidden charges. This includes all materials, labor, and any additional expenses that may arise during the project.

4. Adherence to Deadlines
   A reliable construction company commits to delivering projects within the agreed timelines. It’s crucial that they stick to the established schedule to avoid unnecessary delays and increase customer satisfaction.

5. Effective Communication
   Constant communication with the client is essential. A good construction company keeps the client informed about the project’s progress, any necessary changes, and potential delays. Their availability to answer questions and the clarity of explanations are important factors.

6. Ability to Adapt to Changes
   Circumstances may change during construction, whether due to unforeseen events or design adjustments. A good construction company should be flexible and able to adapt to these changes effectively, while maintaining quality and meeting deadlines.

7. Qualified Professional Team
   A good construction company should have a team of trained workers and professionals: architects, engineers, designers, and skilled laborers. The training and experience of the staff are key to ensuring quality work.

8. Use of High-Quality Materials
   The materials used must be high-quality and appropriate for the type of project you’re undertaking. This ensures not only the durability of the work but also safety and compliance with standards.

9. Reputation and Positive References
   A good construction company has a solid reputation in the market, backed by testimonials and references from previous clients. You can verify this by asking for examples of past work and speaking with people who have worked with them.

10. Warranty and After-Sales Service
    A reliable construction company offers warranties on the work performed. This means they commit to resolving any defects or issues that may arise after project delivery within a reasonable timeframe.

Conclusion
Selecting a good construction company is crucial for the success of your project. Ensure that the company meets these characteristics to guarantee that the work is done professionally, within budget, and on time.