Construction & Contracting Tools

Forms and estimating tools with the language and math the trades expect. All free, no signup required.

Lien Waiver Generator

Create construction lien waivers for progress and final payments

Roofing Calculator

Size a roof and estimate squares, bundles & cost — from an address or by hand

Job Cost & Markup Calculator

Price a job from materials, labor & overhead, then apply markup or margin

Change Order Generator

Document scope changes with line items, contract totals & signatures (PDF)

About these construction tools

Construction work runs on documents and estimates that have to be exactly right — the wrong lien-waiver type can forfeit your right to payment, and a job priced without proper markup loses money on every change. These free tools use the language and math the trades actually expect.

The Lien Waiver and Change Order generators produce the signed paperwork that protects your payments and your scope, and the Roofing and Job Cost & Markup calculators size and price the work itself — from materials and labor through overhead and markup. Each runs in your browser, exports a clean PDF where relevant, and costs nothing to use.

Frequently Asked Questions

Which lien waiver type should I use?
It depends on whether you've already been paid (conditional vs. unconditional) and whether it's a progress or final payment. The generator covers all four standard types — pick the one matching the payment situation, and use your state's statutory form if it mandates one.
Does the job cost calculator include markup or margin?
Both. You enter materials, labor, and overhead, then apply either a markup percentage or a target margin — the tool shows the resulting price and profit so you never confuse the two.
Are the change orders signature-ready?
Yes. The Change Order Generator produces a PDF with line items, revised contract totals, and signature blocks for you and the customer.
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