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DIY Project Plan Builder — Step-by-Step Build Plans with Tool & Material Lists

Sized to Your Calculator Results. Complete Checklists, Safety Guidance, and Product Recommendations.

Plan your next DIY project with a complete step-by-step build guide. Choose from mini-split installation, generator setup, shop heater installation, outbuilding electrical wiring, or water heater replacement. Each plan includes phased instructions, safety warnings, pro tips, a full tool and material checklist, and estimated costs. Run one of our sizing calculators first and the plan automatically adjusts product recommendations to match your results.

Pro Tip: Run the matching calculator first (e.g., Mini-Split Calculator for a mini-split install) so the plan can size your line set, breaker, and wire gauge automatically.

Size your mini-split before starting the install plan

Mini-Split Calculator →

Size your generator before planning the transfer switch setup

Generator Sizing Calculator →

Calculate your shop heating load before choosing a heater

Shop Heater BTU Calculator →

Check voltage drop before wiring your outbuilding

Voltage Drop Calculator →

Size your replacement water heater before starting

Water Heater Sizing Calculator →
Start Using This Tool See How It Works
DIY Project Plan Builder
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How It Works

  1. Choose Your Project

    Select from five project types: mini-split installation, generator and transfer switch setup, shop heater installation, outbuilding electrical wiring, or water heater replacement. Each plan is built for DIY homeowners and includes everything you need.

  2. Run the Sizing Calculator (Optional)

    For the most accurate recommendations, run the matching ToolGrit calculator first. Your sizing results (BTU, kW, wire gauge, tank size) are passed to the plan builder and used to size specific products like line sets, breakers, and wire.

  3. Review the Step-by-Step Plan

    Work through each phase of the project. Every step includes a description, time estimate, pro tips from tradespeople, and safety warnings for things that can go wrong.

  4. Build Your Shopping List

    Each step lists the specific tools and materials needed. Required items are flagged so you know what you absolutely need versus nice-to-have upgrades. The complete bill of materials at the bottom summarizes everything.

  5. Track Progress with Checklists

    Check off each task as you complete it. Your progress is saved automatically so you can close the browser and come back later without losing your place.

Built For

  • First-time DIY homeowners planning a mini-split installation who need to know every tool and step
  • Homeowners installing a backup generator and transfer switch before storm season
  • Shop owners sizing and installing a gas or propane unit heater in an unheated garage or workshop
  • Property owners running electrical service to a shed, barn, or detached garage
  • Homeowners replacing an aging water heater and wanting a complete material list before starting
  • HVAC and electrical apprentices learning real-world installation workflows

Features & Capabilities

5 Project Templates

Mini-split installation, generator and transfer switch setup, shop heater installation, outbuilding electrical wiring, and water heater replacement. Each template is written by tradespeople with real-world installation experience.

Calculator-Driven Sizing

Run a ToolGrit sizing calculator first and the plan adjusts product recommendations automatically. Your BTU calculation sizes the line set, breaker, and wire. Your kW rating sizes the generator cord and transfer switch.

Complete Tool & Material Lists

Every plan includes 12-25 specific products with estimated price ranges. Items are flagged as required or recommended so you can prioritize purchases.

Safety Warnings & Pro Tips

Each step includes practical tips from tradespeople and clear warnings about common mistakes, code violations, and safety hazards. Know what not to do before you start.

Persistent Checklists

Check off steps as you go. Progress is saved in your browser so you can leave and come back without losing your place. Share your progress via URL.

PDF Export

Export the complete plan, material list, and checklists as a branded PDF to print and bring to the job site or the hardware store.

Frequently Asked Questions

These plans are designed for competent DIY homeowners. However, many of these projects require electrical or gas permits and inspections. Check your local building codes and pull the required permits before starting. For work involving high-voltage electrical, gas piping, or refrigerant handling, hiring a licensed professional is strongly recommended if you are not experienced.
Product links may be affiliate links where ToolGrit earns a commission at no extra cost to you. All recommendations are based on real project requirements, not advertising deals. We list what you actually need to complete the job.
Yes. The plan works standalone with general recommendations. Running the matching calculator first just makes the sizing more specific to your situation.
Cost estimates are based on typical retail prices as of 2025-2026 and are shown as ranges. Actual costs vary by location, brand, and retailer. Use the estimates for budgeting, not as exact quotes.
Yes. Your checklist progress saves automatically in your browser. You can also share your plan via URL to access it on another device or send it to someone helping with the project.
Disclaimer: These project plans are for informational and planning purposes only. They are not a substitute for professional installation, engineering design, or licensed contractor services. Many projects described require permits and inspections per local building codes. Always follow manufacturer instructions, applicable building codes, and safety standards. Electrical, gas, and refrigerant work carries inherent risks. ToolGrit is not responsible for any property damage, personal injury, or code violations resulting from DIY work.

Learn More

Productivity

DIY Project Planning: How to Build a Materials List, Size Equipment, and Avoid Common Mistakes

How to plan DIY mechanical and electrical projects from start to finish. Covers building accurate materials lists, sizing equipment from calculator output, permit requirements, tool selection, and the most common mistakes that turn weekend projects into month-long problems.

Read Guide →

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