🔨 Construction Contract Builder
A contract written only for one side can be void in part. This one works for both.
| Client (Party A) | Client business no. | ||
|---|---|---|---|
| Client address | Client tel | ||
| Contractor (Party B) | Contractor business no. | ||
| Contractor address | Contractor tel |
Article 1 (Scope and exclusions) 1. Project: 2. Site: 3. Work: 4. The following are excluded: 5. If excluded work becomes necessary, it starts only after the content and price are agreed in writing.
Article 2 (Period and liquidated damages) 1. Start: 2. Scheduled completion: 3. If completion is delayed due to the Contractor, of the contract price per day is payable as liquidated damages. 4. Delays not attributable to the Contractor are excluded. 5. Periods when work stopped because the Client withheld progress payments are also excluded.
Article 3 (Contract price) 1. Price: KRW (VAT ) 2. Account: 3. The Client pays each installment within days of it falling due.
| Stage | When | Amount | Note |
|---|---|---|---|
Article 4 (Design changes and price fluctuation) 1. If the work changes due to the Client's request, site conditions or law, the change, price and period adjustment are agreed in writing before it proceeds. 2. If material or labour costs move significantly, either party may request an adjustment, and the other may not refuse without substantial reason. 3. Extra work done without written agreement may not be charged.
Article 5 (Suspension, termination, force majeure) 1. If the Client withholds payment for days or more without justification, the Contractor may suspend work; that period is excluded from the period. 2. If the Contractor fails to start or abandons the work without justification, the Client may terminate after demanding cure. 3. Losses from force majeure are borne by each party where they arise. 4. On termination, the value of work completed is settled.
Article 6 (Safety and accidents) 1. The Contractor is responsible for site safety and enrols its workers in industrial accident insurance. 2. Accidents during the work are the Contractor's responsibility, except those caused by defects in materials or information supplied by the Client. 3. Where a safety-management budget applies, its amount and payment are agreed separately.
Article 9 (Supervision) Both parties confirm this project does not require statutory supervision. If it becomes subject to one during the work, this is arranged separately then.
Article 7 (Defect liability) 1. The Contractor repairs defects free of charge for months from completion. 2. On notice, the Contractor begins repair within days. 3. Excluded: the Client's misuse, work altered by third parties, defects inherent in Client-specified materials, and normal wear.
[Qualification] 1. Floor area: m², use: 2. Korean law requires a registered constructor for building or major repair works over 200 m², and also for apartment/multi-household housing at or below that size. 3. Contractor's construction registration no.: 4. The Contractor does not perform work it is not qualified for, and discloses any qualified subcontractor in advance.
Article 8 (Disputes) 1. Matters not covered follow applicable law and trade practice, as agreed between the parties. 2. Failing agreement, disputes are resolved through . 3. This contract is executed in two copies, signed or sealed, one held by each party.
| Contract date | Attachments | Client signature | Contractor signature |
|---|---|---|---|
| Date: (Sign) | Date: (Sign) | Date: (Sign) | Date: (Sign) |
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- TitleConstruction contract · 12/12
- PartiesParties (full) · 12/12
- ScopeArt.1 Scope with exclusions · 12/12
- PeriodArt.2 Period with liquidated damages · 12/12
- Price and paymentArt.3 Contract price · 12/12
- Payment schedulePayment schedule · 12/12
- ChangesArt.4 Changes · 12/12
- SuspensionArt.5 Suspension and termination · 12/12
- SafetyArt.6 Safety · 12/12
- SupervisionNo supervision required · 12/12
- Defect liabilityArt.7 Defect liability · 12/12
- QualificationQualification (building) · 12/12
- DisputesArt.8 Disputes · 12/12
- Date and signatureDate, signature and attachments · 12/12
- LogoCompany logo · 3/12
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- Logo
- Title
- Parties
- Scope
- Period
- Price and payment
- Payment schedule
- Changes
- Suspension
- Safety
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- Defect liability
- Qualification
- Disputes
- Date and signature
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⚠️ This tool is not legal advice. Article 22(5) of the Framework Act on the Construction Industry voids manifestly unfair terms in part. For larger projects, use the Ministry of Land's standard private construction contract.
Forms you should download from the official source
We do not build the forms below. They are statutory filings or ministry-issued standard contracts: the original changes with each revision, and an edited copy may be rejected or lose its effect. Download the current version from the issuing body.
Standard Private Construction Contract
Ministry of Land, Infrastructure and Transport (via the National Law Information Center) · Basis: 건설산업기본법 제22조 제3항
Published as a Ministry of Land notice. It is not one page but a bundle — general conditions, special conditions, drawings and a bill of quantities — so copying only the front page drops exactly the clauses disputes turn on: design changes, price fluctuation and liquidated damages. The notice is periodically revised; check the current notice number.
Search for: “민간건설공사 표준도급계약서”Link checked 2026-08-31
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What this tool does
A construction contract sets out what work is done, for how much, and by when, between the client who orders it and the contractor who performs it. What people actually argue about on site is usually what the contract left out: where the scope ends, who pays for work that changed midway, and whether rained-out days count against the schedule. Article 22(2) of the Framework Act on the Construction Industry requires the contract price, the period and other prescribed matters to be written clearly, and requires signed or sealed copies to be exchanged and kept by both parties — so the common practice of making one copy for one side does not satisfy it. This builder is sized for small carpentry, electrical and interior work, and checks the clauses that are easiest to leave out.
Who uses this
- Hiring an individual carpenter or interior contractor for home work
- Contracting an electrical firm for added circuits or rewiring
- Putting an already-running verbal arrangement into writing
- Starting work when a quote was exchanged but no contract was signed
How to use
- 1Pick a title matching the trade. If electrical work is included, the electrical title pairs with the qualification clause.
- 2Choose the scope block that includes exclusions. Listing only what is included invites the 'I assumed it was covered' dispute.
- 3If you add liquidated damages, pick the block that also excuses delays caused by the client or force majeure.
- 4In the qualification section, pick the block that fits. If none applies, record that fact with the 'not applicable' block.
- 5Add the date and both signatures, identify the quote and drawings as attachments, and keep one signed copy each.
Liquidated damages
Liquidated damages = contract price × daily rate × days of delay. Exclude days caused by the client, by force majeure, or by work stopping because progress payments were withheld.
Worked examples
Liquidated damages
Price KRW 30m, rate 1/1000, 10 days late: 30m × 0.001 × 10 = KRW 300,000 — less the 4 days the client spent deciding on materials, so 6 days apply.
Mid-project change
Mid-project the client upgrades the tile. The change and its price are agreed in writing before it proceeds; extra work done without that agreement is hard to charge for.
Qualification check
Major repair of a 250 m² house. Over 200 m², so a registered constructor must perform it, and the registration number goes in the contract.
Frequently asked questions
Why not just use the ministry's standard contract?
For a sizeable project, do. But that standard form is a bundle — general conditions, special conditions, drawings and a bill of quantities — which is far more than a home carpentry job needs. The official source is linked at the bottom of the forms hub.
Can the contract simply favour the client?
Article 22(5) voids manifestly unfair terms in part, including a clause that refuses price adjustment for design changes or economic shifts without substantial reason, or that shifts that burden onto the other side. A void clause leaves you with a contract that does not contain it.
Can anyone do electrical work?
No. Article 3(1) of the Electrical Construction Business Act reserves electrical work to registered contractors, except for minor works prescribed by Presidential Decree. No drafting cures a qualification problem, which is why this form has a separate qualification section.
How long should the defect period be?
This tool does not set one — it depends on the trade and scale, and statutory periods may apply. What matters here is that a period without exclusions invites claims for the client's own misuse, so the block with exclusions is recommended.
Cautions
- •This tool is not legal advice. For large sums or likely disputes, consult a lawyer or construction specialist.
- •Two signed copies must be made and kept, one by each party.
- •Identify the quote and drawings as attachments, or you end up arguing which version governs.
- •For larger projects use the ministry's standard private construction contract, checking the current notice number.
Last reviewed: 2026-08-31