PDF Signing for Construction & Contractors

General contractors, subcontractors, and construction professionals sign documents constantly — contracts, change orders, lien waivers, bid proposals, and inspection reports. SigPDF lets you sign any PDF from the job site, the office, or the truck. No printing, no scanning, no third-party uploads.

Sign from any job siteNo file uploadsNo account requiredFrom €2.08/month

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Construction Documents You Can Sign with SigPDF

Construction is one of the most paperwork-heavy industries. Every project generates a mountain of documents that need signatures from contractors, subcontractors, owners, architects, and inspectors. SigPDF handles any PDF document:

  • Construction contracts (AIA, ConsensusDocs, and custom)
  • Subcontractor agreements
  • Change orders and contract modifications
  • Lien waivers (conditional and unconditional)
  • Bid proposals and estimates
  • Pay applications and payment certifications
  • Inspection reports and punch lists
  • Safety forms and OSHA compliance documents
  • Insurance certificates and bond documents
  • Permit applications and compliance forms
  • Material delivery receipts and approvals
  • Warranty documents and closeout paperwork

Sign from the Job Site

Construction professionals are rarely at a desk. You are on job sites, in your truck, meeting with clients, or walking through buildings under construction. When a change order needs to be signed immediately to keep a project moving, you cannot always get to a printer or office computer.

SigPDF works in any web browser on any device — your phone, tablet, or laptop. A subcontractor emails you a change order from the site? Open it on your phone, sign it, and send it back in under two minutes. No app to install, no account to create, no waiting until you get back to the office. This speed keeps projects on schedule and prevents costly delays.

For General Contractors

As a GC, you manage multiple subcontractors, each with their own set of agreements, change orders, pay applications, and lien waivers. During a busy project, you might sign dozens of documents in a single week. SigPDF's unlimited signing at a flat €2.08/month (annual plan) means your document signing costs are predictable regardless of project volume.

For Subcontractors

Subcontractors sign agreements, lien waivers, safety acknowledgments, and payment documents for every project they work on. If you work with multiple general contractors, you may need to sign documents in different formats and on different schedules. SigPDF handles any PDF from any source — open it, sign it, send it back.

For Property Owners and Developers

Property owners and developers sign construction contracts, approve change orders, review pay applications, and execute closing documents throughout a project's lifecycle. SigPDF provides a fast way to handle the signing step — open the PDF your contractor or architect sends, add your signature and date, and return the signed copy. Your project details and financial information stay on your device.

Privacy for Project Documents

Construction documents often contain sensitive business information — contract values, payment schedules, profit margins, subcontractor rates, and proprietary project details. SigPDF processes your documents entirely in your browser. No project data, financial details, or contract terms are uploaded to any third-party server. This is particularly important for competitive bidding situations where contract details must remain confidential.

How to Sign Construction Documents with SigPDF

  1. Open the construction document PDF using the editor above — click “Choose File” or drag and drop
  2. Create your signature by drawing with your finger (on phone/tablet) or mouse, typing, or uploading a signature image
  3. Place your signature on the document, add dates and any required initials
  4. Download the signed document — your signature is permanently embedded in the PDF

Legally Valid for Construction Industry

Electronic signatures on construction documents are legally recognized under the ESIGN Act (US), UETA, and the eIDAS Regulation (EU). This includes construction contracts, change orders, lien waivers, and bid proposals. Most government construction projects and private contracts accept electronic signatures — always verify specific contract requirements for public projects.

Frequently Asked Questions

Are electronically signed construction contracts legally binding?
Yes. Under the ESIGN Act (US) and eIDAS Regulation (EU), electronic signatures on construction contracts are legally enforceable. This includes general contracts, subcontractor agreements, change orders, and lien waivers. Some government construction projects may have specific signature requirements — check your contract terms.
Can I sign change orders electronically?
Yes. Change orders are standard construction documents that can be signed electronically with SigPDF. Open the change order PDF, add your signature and date, and download the signed copy. This is especially useful when you need to authorize changes quickly from the job site.
Can I sign construction documents from my phone on a job site?
Yes. SigPDF works in any modern web browser on any device — iPhone, Android, iPad, or desktop. You can sign contracts, change orders, and inspection reports directly from the job site without needing a printer or access to an office computer.
Can I sign lien waivers with SigPDF?
Yes. Conditional and unconditional lien waivers, partial lien waivers, and final lien waivers can all be signed with SigPDF. Some jurisdictions have statutory lien waiver forms — as long as the form is in PDF format, SigPDF can handle it.
Is SigPDF affordable for independent contractors and small construction companies?
Yes. SigPDF costs €2.08/month on an annual plan with unlimited document signing. There are no per-document fees. Whether you sign 5 documents or 50 in a month, the price stays the same. This is significantly less than enterprise e-signature platforms.
Can I sign multi-page construction contracts with SigPDF?
Yes. SigPDF handles multi-page PDFs seamlessly. You can scroll through all pages of a construction contract, place your signature on the signature page, add initials on pages that require them, and include dates wherever needed — all without leaving your browser.
Does SigPDF work offline at a job site?
Once the SigPDF page is loaded in your browser, the signing tool works without an active internet connection. All PDF processing happens locally on your device, so you can sign documents even in areas with limited or no mobile data coverage.

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