The BHS Animal & Plant Science Remodel is a single-story interior renovation project requiring coordination across multiple trades including demolition, concrete, structural framing, MEP systems, and selective exterior work.
From a General Contractor’s perspective, this project is a multi-trade coordination job with:
- Heavy renovation logistics
- Significant MEP integration
- High labor-to-material cost ratio
- Limited quantities but high mobilization impact
This type of project demands careful cost control, subcontractor coordination, and schedule management due to its occupied facility constraints and phased work conditions.
2. INCLUDED TRADE SCOPES
The following trade estimates have been developed and consolidated:
- Site Preparation & Demolition
- Concrete (Complete)
- Foundation Work
- Structural Framing
- Roofing (Complete)
- HVAC (Complete)
- Electrical (Complete)
Each scope reflects detailed subcontractor-level pricing, including:
- Material
- Labor (prevailing wage)
- Equipment
- Overhead & Profit
3. TRADE COST BREAKDOWN
| Trade Scope | Cost |
|---|---|
| Site Preparation & Demolition | $31,160 |
| Concrete | $6,576 |
| Foundation Work | $9,259 |
| Structural Framing | $4,450 |
| Roofing | $4,838 |
| HVAC | $18,418 |
| Electrical | $38,123 |
| Subtotal (Direct Trades) | $112,824 |
4. GENERAL CONDITIONS (GC COSTS)
For a renovation project of this nature, the GC must include:
A. Project Management
- Superintendent (partial allocation)
- Project manager oversight
- Site coordination
Allowance:
$9,500
B. Temporary Facilities & Site Costs
- Temporary power
- Site protection
- Temporary partitions
- Safety compliance
Allowance:
$6,800
C. Mobilization & Logistics
- Site setup
- Deliveries coordination
- Waste coordination beyond subcontractors
Allowance:
$4,200
D. Permits & Inspections
- Local permits
- Inspection coordination
Allowance:
$3,500
Total General Conditions:
$24,000
5. GC SUBTOTAL
| Category | Amount |
|---|---|
| Trade Subtotal | $112,824 |
| General Conditions | $24,000 |
| Subtotal | $136,824 |
6. CONTINGENCY
For renovation projects, contingency is critical due to unknown conditions.
Recommended:
- 7% contingency
$136,824 × 7% = $9,578
7. GC OVERHEAD & PROFIT
Typical GC markup for this project type:
- Overhead: 8%
- Profit: 8%
Applied to subtotal + contingency:
$146,402 × 16% = $23,424
8. FINAL GC ESTIMATE
| Category | Amount |
|---|---|
| Subtotal (Trades + GC Costs) | $136,824 |
| Contingency | $9,578 |
| GC O&P | $23,424 |
| TOTAL PROJECT COST | $169,826 |
9. FINAL PROJECT SUMMARY
Estimated Total Construction Cost: $169,826
10. ESTIMATOR’S PROFESSIONAL INSIGHTS
From a General Contractor’s standpoint, this project is deceptively small but operationally complex.
Key Cost Drivers:
- Electrical scope dominates cost (~34%)
- Demolition and disposal (~28%)
- HVAC coordination (~16%)
- High labor burden across all trades
- Multiple small mobilizations
Major Project Risks:
1. Existing Conditions
- Unknown MEP routing
- Hidden structural constraints
- Potential slab thickness variations
2. Occupied Facility Constraints
- Limited work hours
- Noise restrictions
- Safety compliance requirements
3. Coordination Complexity
- Mechanical, electrical, and structural overlap
- Tight ceiling and wall spaces
- Sequencing dependencies
Recommended GC Clarifications:
- Hazardous material abatement excluded
- After-hours work excluded
- Existing utilities assumed adequate
- One mobilization per trade
- No major structural redesign included
These clarifications are essential to protect margins.
11. STRATEGIC GC BIDDING INSIGHT
For projects like this, successful GCs:
- Focus on tight subcontractor coordination
- Control schedule sequencing
- Manage change orders proactively
- Closely track labor productivity
Profitability is achieved through execution, not just estimating accuracy.