Serious residential safe-room budgets are shaped by far more than room size. Existing conditions, retrofit access, professional coordination, intended objectives, openings and interfaces, finishes, documentation, installation, logistics, and who accepts complete-scope responsibility can all change the work.
Questions that make an estimate more meaningful
- Is the project new construction, active construction, or a retrofit?
- Which broad objectives require professional evaluation?
- Who is coordinating architecture, engineering, security, and construction?
- What does the proposed scope include and explicitly exclude?
- Which claims are provider-stated, and what evidence and limitations accompany them?
- Who accepts responsibility for interfaces and the complete boundary?
Compare like with like
When reviewing proposals, distinguish design and coordination, specified components, site work, installation, finishes, commissioning or documentation, travel, and ongoing service. A lower headline number may simply describe a narrower scope.