Professional Construction Contract Drafting

Construction Contract Drafting With AIA and ConsensusDocs Familiarity

Construction contract agreements drafted by AI or licensed attorneys. Whether you are a general contractor building a commercial development, a subcontractor protecting your mechanic's lien rights, or a property owner managing a fixed-price contract, our construction contract attorney service delivers enforceable, state-specific agreements with proper change order procedures, retainage schedules, and AIA contract standard provisions, starting at $49.

By Jessica Henwick, Editor-in-ChiefLegally reviewed by David Chen, Esq.

What Is a Construction Contract and Why Does It Matter?

A construction contract is a legally binding agreement between a property owner (or developer) and a general contractor that establishes the scope of work, project schedule, payment terms, and procedures for handling modifications during the course of construction. Construction contract defines scope schedule payment terms and change order procedures. Unlike simple service agreements, construction contracts must address the unique risks inherent in building projects: weather delays, material price fluctuations, concealed site conditions, subcontractor coordination, regulatory inspections, and the complex web of mechanic's lien rights that protect every party in the payment chain.

The construction industry relies heavily on standardized contract forms, and the most widely adopted are published by the American Institute of Architects. AIA contracts are the most widely used standard construction contract forms. The AIA contract family includes the A101 (owner-contractor agreement for a stipulated sum), A102 (cost-plus with a guaranteed maximum price), A201 (general conditions), and dozens of specialized forms for design-build, construction management, and subcontractor agreements. While AIA forms provide an excellent foundation, they require careful customization to address project-specific requirements, local building codes, and state-specific construction statutes.

Construction contracts also create a framework for managing change order disputes, the single most common source of construction litigation. A properly drafted change order clause defines who can authorize additional work, how pricing is calculated (using agreed-upon markup rates versus competitive bids), how schedule impacts are assessed, and what documentation the contractor must provide before additional compensation is approved. Without these provisions, owners face unauthorized work charges and contractors risk performing unpaid labor.

The financial protections embedded in construction contracts extend beyond the owner-contractor relationship. Mechanic's lien rights protect contractors and subcontractors for unpaid work. Every state provides statutory lien rights that allow unpaid contractors, subcontractors, and material suppliers to place a lien on the property itself as security for payment. The construction contract must coordinate lien waiver procedures with the payment schedule to protect the owner from double-payment risk while preserving the contractor's legitimate security interest. Whether you need a new contract drafted or an existing agreement reviewed, our attorney contract drafting and document review service ensure every construction-specific provision is properly addressed.

Types of Construction Contracts We Draft

Each construction contract type allocates risk and cost differently between the property owner and the general contractor. Selecting the right structure depends on project scope, budget certainty, and design completeness.

Fixed-Price (Lump Sum)

Total project cost established upfront. The contractor assumes cost overrun risk while the owner gains price certainty. Best for projects with detailed plans, complete specifications, and well-defined scope where accurate cost estimating is possible.

Cost-Plus

Contractor is reimbursed for all actual costs plus a negotiated fee or percentage markup. The owner bears cost overrun risk but gains full transparency into expenditures. Ideal for renovation projects, emergency repairs, or work with uncertain scope.

Time & Materials

Owner pays agreed hourly labor rates plus actual material costs. Commonly includes a not-to-exceed cap to limit owner exposure. Best for small projects, maintenance work, or situations where scope cannot be defined before work begins.

Unit Price

Work is priced per measured unit, per cubic yard of concrete, per linear foot of pipe, per square foot of flooring. Total cost depends on actual quantities installed. Common in civil engineering, road construction, and utility projects.

Design-Build

Single entity provides both design and construction services under one contract. Streamlines communication, reduces disputes between designer and builder, and accelerates project delivery. Popular for commercial and institutional projects.

Not sure which contract type fits your project? Our agreement writing service can help you evaluate whether a fixed-price contract, cost-plus contract, or time and materials structure best matches your project's risk profile and design stage.

How Our Construction Contract Service Works

Two paths to a professionally drafted construction contract. Choose the approach that matches your project complexity, timeline, and budget.

AI-Generated Path

1

Select your contract type

Choose from fixed-price, cost-plus, time and materials, unit price, or design-build contract structures. Each type generates provisions specific to that delivery method and risk allocation.

2

Define project scope and terms

Enter project details including scope of work description, contract price or pricing method, payment schedule (progress billing or milestone draws), retainage percentage, project timeline, and your state jurisdiction.

3

AI drafts your state-specific contract

The system generates a comprehensive construction contract with change order procedures, mechanic's lien waiver provisions, insurance requirements, warranty terms, dispute resolution clauses, and state-mandated construction disclosures.

4

Review, download, and execute

Review the completed contract, customize any provisions, download in PDF or DOCX format, and use our built-in e-signature tool to collect signatures from all parties before work begins.

Starting at $49 · Delivered in minutes

Get started with AI drafting

Attorney-Drafted Path

1

Submit your project requirements

Describe the project type (residential, commercial, industrial), contract structure preference, estimated value, subcontractor involvement, existing plans or specifications, and any specific concerns about lien rights or insurance.

2

Attorney reviews and consults

A licensed attorney with construction law experience reviews your requirements, analyzes state-specific lien statutes and licensing requirements, and contacts you to clarify scope, payment structure, and risk allocation preferences.

3

Custom contract drafting

Your attorney drafts the complete construction contract from scratch, including customized change order procedures, retainage schedules, mechanic's lien waiver flows, insurance and bonding requirements, and liquidated damages provisions.

4

Negotiate and revise

Review the draft with the other party, request revisions, and work with your attorney on counterproposals for scope, pricing, schedule, and risk allocation until every provision meets your project requirements.

5

Execute and manage

Receive the final contract in PDF and DOCX. Use our e-signature tool to collect all signatures and store the executed contract, change order forms, and lien waivers in your secure document vault.

From $149 · 24-72 hour delivery

See attorney pricing

Construction Contract Services: AI vs. Attorney vs. DIY

Not sure which construction contract service tier fits your project? This comparison covers construction-specific capabilities that matter most for protecting owners, contractors, and subcontractors.

AI-Generated

Attorney-Drafted

DIY / Templates

Price
From $49
From $149
Free - $50
Scope Definition
Structured questionnaire
Custom scope with specs
Self-drafted
Change Order Process
Standard AIA-based
Custom multi-tier approval
Not addressed
Payment Schedule
Milestone or progress billing
Custom draw schedule
Basic terms only
Retainage Terms
Standard 5-10% holdback
Tiered retainage with release triggers
Rarely included
Lien Waivers
Conditional/unconditional forms
State-specific lien coordination
Not included
Insurance Requirements
Standard CGL & workers comp
Custom limits, additional insured, builder's risk
Not addressed
Warranty Period
1-year standard workmanship
Custom warranty with exclusions
Generic or missing
Dispute Resolution
Mediation then arbitration
Multi-step: field resolution, mediation, arbitration
Not specified
Liquidated Damages
Standard per-diem clause
Custom calculation with force majeure
Not included
Subcontractor Flow-Down
Basic pass-through terms
Full flow-down with back-to-back provisions
Not addressed
Best For
Residential & small commercial
Complex commercial & industrial
Minor repairs only

Why Choose Legal Tank for Construction Contract Services

Six reasons contractors, owners, and developers trust Legal Tank for construction contract drafting and review.

AIA-Standard Expertise

Our construction contracts follow AIA document conventions, the most widely recognized standard in the industry. Whether you need an A101 stipulated sum agreement, an A102 cost-plus contract, or custom provisions, every document reflects industry-accepted language that banks, insurers, and courts recognize.

Mechanic's Lien Protection

Every construction contract includes state-specific mechanic's lien waiver procedures coordinated with the payment schedule. We address preliminary notice requirements, conditional and unconditional waiver forms, and lien release timelines to protect property owners from double-payment exposure and contractors from forfeiting lien rights.

Change Order Procedures

Our contracts include multi-tier change order procedures that define authorization levels, pricing methods (agreed rates, competitive bids, or time and materials), schedule impact assessment, and documentation requirements. This prevents the most common source of construction disputes.

AI + Attorney Dual Model

Choose AI-generated construction contracts for straightforward residential projects or attorney-drafted agreements for complex commercial developments. Start with AI at $49 and upgrade to attorney review at any time. No other service offers both paths.

Retainage & Payment Controls

Every contract includes retainage provisions with clear release triggers tied to substantial completion and punch list sign-off. Payment schedules are structured with milestone draws, progress billing, or scheduled payments coordinated with lien waiver collection.

50-State Construction Compliance

Construction law varies dramatically by state. Our contracts incorporate state-specific contractor licensing requirements, lien filing deadlines, notice provisions, trust fund statutes, prompt payment act requirements, and right-to-cure provisions for your jurisdiction.

Construction Contract Pricing

Transparent pricing for every construction contract complexity level. No hidden fees, no hourly surprises.

AI-Assisted

$49

AI-generated, state-specific construction contract

  • Fixed-price, cost-plus, or T&M structure
  • State-specific provisions & disclosures
  • Standard change order procedures
  • Payment schedule with retainage
  • Mechanic's lien waiver forms
  • Insurance & warranty provisions
  • PDF & DOCX export
  • E-signature ready
Get Started
Most Popular

Attorney Review

$149–$299

Attorney-customized with construction-specific protections

  • Everything in AI-Assisted
  • Custom change order approval tiers
  • Tiered retainage release schedule
  • State-specific lien coordination
  • Liquidated damages calculation
  • Subcontractor flow-down provisions
  • Builder's risk insurance review
  • Direct attorney communication
  • Two revision rounds
Most Popular

Attorney-Drafted

$549

Fully custom attorney-drafted construction contract

  • Everything in Attorney Review
  • Complex commercial & industrial projects
  • Design-build & CM-at-risk structures
  • Performance & payment bond provisions
  • Environmental & OSHA compliance
  • Multi-party coordination clauses
  • Unlimited revisions
  • Phone consultation included
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Understanding Construction Contract Law

Construction contract law sits at the intersection of contract law, real property law, and a dense layer of state-specific statutes governing licensing, liens, prompt payment, and building codes. Every state has enacted its own version of mechanic's lien statutes, and these vary dramatically in their requirements for preliminary notices, filing deadlines, and enforcement procedures. In California, a subcontractor must serve a preliminary 20-day notice to preserve lien rights. In Texas, the lien filing deadline is the 15th day of the fourth month after the month in which the work was last performed. In New York, the deadline is eight months from completion for private projects. Mechanic's lien rights protect contractors and subcontractors for unpaid work, but only when the statutory requirements are satisfied precisely.

Retainage is a construction-specific payment mechanism where the property owner withholds a percentage of each progress payment (typically 5–10%) as security for the contractor's completion of all work. Retainage withholds a percentage of payment until substantial completion of the project. The withheld funds are released after the project reaches substantial completion, the point at which the work is sufficiently complete that the owner can occupy or use the project for its intended purpose, even if minor punch list items remain. Many states have enacted retainage reform statutes that cap the percentage at 5%, require release within a specified timeframe after substantial completion, and prohibit retainage reduction on subcontractor payments that exceeds the retainage on the prime contract.

Substantial completion is one of the most consequential milestones in a construction project. It triggers retainage release obligations, starts warranty periods, shifts risk of loss from the contractor to the owner, and begins the running of lien filing deadlines. The determination of when a project has reached substantial completion is frequently disputed. A well-drafted construction contract defines substantial completion with specificity, typically tied to the issuance of a certificate of occupancy by the local building authority, the completion of all punch list items below a defined dollar threshold, or a formal written determination by the project architect.

Liquidated damages clauses set a predetermined penalty amount for construction delays. These provisions establish a daily or weekly dollar amount the contractor must pay (or that is deducted from the contract balance) for each day the project extends beyond the contractual completion date. To be enforceable, the liquidated damages amount must represent a reasonable estimate of the owner's actual delay damages at the time of contracting, not a penalty. Courts routinely strike down liquidated damages provisions that are grossly disproportionate to actual anticipated losses. The contract must also include force majeure provisions that excuse delay for events beyond the contractor's control, such as extreme weather, material shortages, government shutdowns, or labor strikes.

The AIA contract system addresses these complexities through standardized provisions developed over more than a century of construction industry practice. The A201 General Conditions document alone runs over 40 pages and covers claims procedures, insurance requirements, subcontractor relations, changes in the work, time management, payments, protection of persons and property, and contract termination. While AIA forms provide an excellent starting point, they should always be supplemented with project-specific provisions and modified to comply with local construction statutes. Our contract drafting service customizes AIA-standard provisions for your specific project, jurisdiction, and risk requirements.

Pro Tip

Always require written authorization before any change order work begins. Your construction contract should specify that no additional compensation will be paid for work performed without a signed change order, regardless of verbal instructions from the owner, architect, or project manager. Define pricing methods in advance: use agreed-upon labor rates and material markup percentages for time-and-materials changes, or require competitive bids for changes exceeding a specified dollar threshold. Include a “constructive change” clause that addresses situations where the owner's actions or directives effectively change the scope without a formal change order. Construction contract defines scope schedule payment terms and change order procedures.

Warning

Mechanic's lien deadlines are strictly enforced and cannot be extended. Missing a filing deadline by even one day permanently forfeits your lien rights, eliminating your most powerful collection tool for unpaid construction work. Preliminary notice requirements are equally unforgiving, in many states, a subcontractor or material supplier who fails to serve a preliminary notice within the statutory window (typically 20–30 days from first furnishing labor or materials) loses all lien rights regardless of the amount owed. Mechanic's lien rights protect contractors and subcontractors for unpaid work, but only when every procedural requirement is satisfied on time. Property owners face the opposite risk: without proper lien waiver collection coordinated with each progress payment, an owner can pay the general contractor in full and still face lien claims from unpaid subcontractors and suppliers.

Key Statute

Every state has enacted mechanic's lien statutes that govern the filing requirements, priority, and enforcement of construction liens. These statutes also establish prompt payment requirements that mandate how quickly owners must pay general contractors and how quickly general contractors must pay subcontractors after receiving payment. Many states impose interest penalties and attorney fee liability for late payments. For example, California's prompt payment statute (Civil Code §8812) requires payment within 30 days of a proper payment application. Texas Property Code Chapter 53 establishes a detailed system of notices, retainage caps, and trust fund obligations. New York's Lien Law Article 3-A creates a trust fund for construction payments, making misuse of construction funds a criminal offense. Retainage withholds a percentage of payment until substantial completion of the project. Our attorney document review can verify that your construction contract complies with your state's lien statutes and prompt payment requirements.

Background Reading on Mechanic's Liens and Change-Order Mechanics

Frequently Asked Questions About Construction Contract Services

Everything you need to know about construction contract drafting, contract types, change order procedures, mechanic's lien protections, and choosing the right contract structure for your project.

What should a construction contract include?
A construction contract must include a detailed scope of work defining every task and material, a payment schedule with milestone-based draws or progress billing, change order procedures specifying how modifications are priced and approved, a project timeline with start and completion dates, warranty provisions covering workmanship and materials, insurance requirements for both parties, dispute resolution mechanisms such as mediation or arbitration, and mechanic's lien waiver procedures. At Legal Tank, our construction contract service ensures every one of these provisions is drafted with state-specific compliance and industry-standard language based on AIA contract frameworks.
Who is responsible for cost overruns in a construction project?
Responsibility for cost overruns depends entirely on the contract type and the cause of the overrun. Under a fixed-price (lump sum) contract, the contractor absorbs cost overruns unless the owner caused them through scope changes, design errors, or differing site conditions. Under a cost-plus contract, the owner pays all actual costs plus the contractor's fee, so overruns flow through to the owner unless capped by a guaranteed maximum price clause. Time-and-materials contracts charge the owner for all hours worked and materials used, so cost discipline depends on owner oversight. Regardless of contract type, written change orders are critical, any work performed without a signed change order risks payment disputes. Most well-drafted construction contracts also include a contingency allowance (typically five to ten percent of the contract price) to cover minor unforeseen items without triggering formal change orders.
Is a construction contract legally binding?
Yes, a construction contract is a legally binding agreement once both parties sign it, provided it contains the essential elements of a valid contract: offer, acceptance, consideration (payment for work), mutual assent, and legal capacity of both parties. Oral construction agreements can be binding but are extremely difficult to enforce and are prohibited for projects exceeding certain dollar thresholds under state statutes of frauds. A written construction contract provides enforceable evidence of the agreed scope, price, timeline, and dispute resolution terms. Our construction contract attorney service ensures your agreement meets all legal requirements for enforceability in your state.
What is a change order in a construction contract?
A change order is a written document that modifies the original construction contract after execution. Change orders typically alter the scope of work, adjust the contract price, extend the completion timeline, or change material specifications. Proper change order procedures require written authorization from the property owner before the contractor begins additional work, a detailed description of the modified scope, the cost impact calculated using agreed-upon rates, and the schedule impact. Without clear change order provisions in the original contract, disputes frequently arise over whether additional work was authorized and how it should be priced. Our contracts include detailed change order procedures that protect both parties.
What is a lien waiver in construction?
A lien waiver is a document signed by a contractor, subcontractor, or material supplier that relinquishes their right to file a mechanic's lien against the property for the amount of payment received. There are four types: conditional waiver on progress payment (waives lien rights upon receipt of a specific progress payment), unconditional waiver on progress payment (immediately waives rights regardless of payment clearance), conditional waiver on final payment, and unconditional waiver on final payment. Property owners should require conditional lien waivers before releasing each progress payment and unconditional waivers only after confirming funds have cleared. Our construction contracts include lien waiver procedures integrated into the payment schedule.
How do I write a construction contract?
Writing a construction contract requires defining the project scope with specificity, establishing a payment structure tied to milestones or progress, drafting change order procedures, specifying insurance and bond requirements, including mechanic's lien waiver provisions, setting warranty terms, establishing dispute resolution procedures, and ensuring compliance with state construction statutes and licensing requirements. Rather than drafting from scratch, most professionals use AIA standard forms or engage a construction contract attorney service. At Legal Tank, our AI-generated construction contracts start at $49 and include all essential provisions with state-specific compliance, while our attorney-drafted tier provides custom clauses for complex commercial projects.
What is the difference between fixed-price and cost-plus contracts?
A fixed-price (lump sum) contract establishes a total project price upfront. The contractor bears the risk of cost overruns but keeps any savings if the project comes in under budget. This structure works best for projects with well-defined scope and detailed plans where costs can be accurately estimated. A cost-plus contract reimburses the contractor for all actual costs (labor, materials, equipment, subcontractors) plus either a fixed fee or a percentage markup. The property owner bears the cost overrun risk but benefits from transparency into actual project costs. Cost-plus contracts are appropriate for projects with uncertain scope, phased construction, or renovation work where hidden conditions may affect costs.
Can a construction contract be terminated early?
Yes, a construction contract can be terminated early through several mechanisms. Termination for cause allows either party to end the contract when the other materially breaches its obligations, such as contractor abandonment, persistent defective work, or owner failure to make payments. Termination for convenience allows the owner to end the contract at any time for any reason, but the contractor is entitled to payment for completed work plus reasonable overhead and profit on unperformed work. Suspension clauses permit temporary work stoppages. The contract should specify written notice requirements, cure periods allowing the breaching party to remedy defaults, and the financial settlement procedures upon termination. Our attorney-drafted construction contracts include detailed termination provisions protecting both parties.

Ready to Get Your Construction Contract Drafted?

Start with an AI-generated construction contract or request custom attorney drafting. AIA contract standards, mechanic's lien protections, and change order procedures built in, with transparent pricing you can see before you start.

Construction-Adjacent Engagements From Subcontracts to Lien Releases