blackmount-construction-mcp 0.4.1

Construction estimating as code. MCP server with 48 tools for materials, labor, cost, structural, permits, plumbing, electrical, HVAC, and estimate generation. Replaces SaaS estimating tools for AI agents and contractors.

Blackmount Construction MCP

The unified construction MCP for developers — all trades in one server.

48 tools spanning materials, labor, cost, structural, permits, plumbing, electrical, HVAC, and estimate generation. One pip install for the whole jobsite.

Built by Blackmount AI. Free web versions at tools.blackmount.ai.

Install

pip install blackmount-construction-mcp

Or with uv:

uvx blackmount-construction-mcp

Claude Desktop Configuration

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "construction": {
      "command": "uvx",
      "args": ["blackmount-construction-mcp"]
    }
  }
}

Or if installed via pip:

{
  "mcpServers": {
    "construction": {
      "command": "blackmount-construction-mcp"
    }
  }
}

Example Prompts

Once connected, ask Claude things like:

"How much concrete do I need for a 24×36 slab, 4 inches thick?"

"Size the panel for a 2400 sqft house with electric range, electric dryer, and central AC."

"What's the simplified Manual J heat load for a 1800 sqft home in climate zone 5?"

"Estimate the labor hours and cost for installing 1200 sqft of drywall with a 2-person crew."

"Generate an HTML estimate for a kitchen remodel: $8,500 cabinets, 35 sqft of quartz at $75/sqft, 8.25% tax."

The agent picks the right tool, runs the calculation, and replies with structured numbers — no spreadsheets.

Tool Categories (48 total)

Module	Tools	What it covers
Materials	10	Concrete, rebar, lumber, drywall, paint, roofing, tile, insulation, brick
Labor	4	Hours for 28 task types, cost with overtime, crew scheduling, productivity
Cost	7	Material costing, markup, overhead, profit margin, change orders, budgets
Structural	7	Beam loads, joist spacing, footings, snow/wind loads, concrete mix, rebar
Permits	4	Fee estimates, inspection checklists, zoning setbacks, occupancy (IBC)
Plumbing	5	Pipe sizing (IPC), water heater sizing, drain slope, fixture units, cost
Electrical	5	Load calc (NEC 220), wire gauge, circuit sizing, panel capacity, cost
HVAC	4	Manual J simplified, duct sizing, equipment sizing, system cost
Estimates	2	Plain-text and HTML formatted estimate documents

Structural and Manual J calculators are planning-grade, not for final engineering design. Consult a licensed engineer for stamped drawings.

All Tools

Materials (10)

Tool	Description
calculate_concrete_volume	Cubic yards for slabs/footings
calculate_concrete_bags	Bag count (60/80/90 lb)
calculate_rebar_quantity	Linear feet of rebar for slabs
calculate_lumber_board_feet	Board feet calculation
calculate_drywall_sheets	Sheet count with waste factor
calculate_paint_gallons	Gallons for multi-coat coverage
calculate_roofing_squares	Squares and bundles
calculate_tile_quantity	Tile count with waste
calculate_insulation_batts	Batt count
calculate_brick_count	Bricks + mortar bags

Labor (4)

Tool	Description
estimate_labor_hours	Hours for 28 task types by skill level
calculate_labor_cost	Cost with overtime
calculate_crew_days	Working days for crew
calculate_productivity_rate	Actual vs standard productivity

Cost (7)

Tool	Description
estimate_material_cost	Total from line items
calculate_markup	Contractor markup
calculate_overhead	Overhead allocation
calculate_profit_margin	Margin analysis
calculate_change_order	Change order pricing
calculate_cost_per_sqft	Per-sqft with benchmarks
create_project_budget	Full budget breakdown

Structural (7)

Tool	Description
calculate_beam_load	Allowable beam load (SPF, DF, SYP, HF)
calculate_joist_spacing	Recommended spacing
calculate_footing_size	Foundation footing width
calculate_snow_load	Roof snow load (ASCE 7)
calculate_wind_load	Wind pressure by height
get_concrete_mix_ratio	Mix ratio for target PSI
calculate_rebar_development_length	Development length (ACI 318)

Permits & Compliance (4)

Tool	Description
estimate_permit_fee	Fee estimate by jurisdiction
get_inspection_checklist	Required inspections
check_setbacks	Zoning setback analysis
calculate_occupancy_load	Max occupancy (IBC)

Plumbing (5)

Tool	Description
calculate_pipe_sizing	Pipe diameter from fixture units (IPC)
calculate_water_heater_sizing	Tank size + recovery rate
calculate_drain_slope	Min slope per IPC code
calculate_fixture_count	Total fixture units for residential
estimate_plumbing_cost	Full cost: materials + labor + permits

Electrical (5)

Tool	Description
calculate_electrical_load	Total load + panel size (NEC 220)
calculate_wire_gauge	AWG by ampacity + voltage drop
calculate_circuit_sizing	Breaker size with 80% rule
check_panel_capacity	Can panel handle new circuits?
estimate_electrical_cost	Full cost: materials + labor + permits

HVAC (4)

Tool	Description
calculate_heat_load	Simplified Manual J (BTU, tonnage, CFM)
calculate_duct_sizing	Duct diameter for given CFM
calculate_equipment_sizing	AC tonnage + furnace BTU by climate zone
estimate_hvac_cost	System install cost by type

Estimate Documents (2)

Tool	Description
create_text_estimate	Formatted plain-text estimate
create_html_estimate	Professional HTML estimate (inputs HTML-escaped)

Use as a Python Library

Each module is also importable for non-MCP use:

from blackmount_construction_mcp import materials, electrical, hvac, plumbing, pdf_estimate

# Concrete for a 20×30 slab, 4 inches thick
materials.concrete_volume(20, 30, 4)
# {'cubic_feet': 200.0, 'cubic_yards': 7.41, 'order_yards': 8.25, ...}

# Electrical load calc for a 2000 sqft house
electrical.electrical_load_calc(2000, 15, ["electric_range", "electric_dryer", "central_ac"])
# {'total_load_va': ..., 'recommended_panel_amps': 100, ...}

# Generate an HTML estimate (user inputs are HTML-escaped)
pdf_estimate.generate_estimate_html(
    project_name="Kitchen Remodel",
    client_name="Jane Smith",
    line_items=[
        {"description": "Cabinets", "quantity": 1, "unit": "set", "unit_price": 8500},
        {"description": "Quartz countertop", "quantity": 35, "unit": "sqft", "unit_price": 75},
    ],
    tax_rate=8.25,
)

Want these tools in your browser?

All calculators are available as free web tools at tools.blackmount.ai/construction.

Construction Pro (coming soon) will add: branded estimate PDFs, multi-project workspace, saved estimates, and contractor markup presets. Pricing →

On the job site?

Blackmount Field (iOS, coming soon) brings these calculators into a contractor's mobile workflow:

• Quick estimates from a phone
• Change orders with photo proof and GPS
• Client e-signatures + share links
• Branded PDF output
• Project memory across visits

This MCP package is the underlying calculation engine. Blackmount Field is the contractor app on top of it.

• iOS app: coming soon
• Web tools today: tools.blackmount.ai/construction

Part of the Blackmount Ecosystem

This MCP server is part of Blackmount — the AI work vault that captures your AI conversations, meetings, and browser data into private project memory.

• Blackmount Extension — Capture AI chats from ChatGPT, Claude, Gemini, and 10+ platforms
• tools.blackmount.ai — Free online calculators (construction, finance, trading, and more)
• app.blackmount.ai — The AI work vault

More MCP Servers by Blackmount

Package	Focus	Install
blackmount-construction-mcp	All-trades construction (this package)	pip install blackmount-construction-mcp
blackmount-mcp	Browser memory + page intelligence	pip install blackmount-mcp
blackmount-nlp-mcp	NLP + text analysis	pip install blackmount-nlp-mcp
blackmount-electrical-mcp	Deeper electrical engineering (coming soon)	—
blackmount-hvac-mcp	Deeper HVAC engineering (coming soon)	—
blackmount-engcalc-mcp	General engineering calc (coming soon)	—

Comparison

	ProEst	Buildertrend	Blackmount Construction MCP
Price	$389/mo	$99/mo	Free (MIT)
AI-native (MCP)	No	No	Yes
Use from code	No	No	Yes
Self-hosted	No	No	Yes
Offline capable	No	No	Yes

This is a calculation engine that plugs into any AI assistant, script, or application via the Model Context Protocol. Not a SaaS dashboard.

Development

git clone https://github.com/BlackMount-ai/blackmount-construction-mcp.git
cd blackmount-construction-mcp
python -m venv .venv && source .venv/bin/activate
pip install -e .
pip install pytest
pytest tests/ -v

License

MIT License. See LICENSE.