Quick answer

If as-built plans do not accurately show the construction, first determine which record is wrong: the as-built drawings, the permit-approved plans, the construction itself, or the owner-contractor agreement. Do not simply revise the drawings to make the discrepancy disappear.

Under the National Building Code of the Philippines, approved plans and specifications may not be changed without the Building Official’s approval. The DPWH implementing rules require changes during construction to be submitted and an amendatory permit issued before the changed work begins. As-built plans must faithfully record the structure as actually built, including properly approved amendments.

The safest course is to:

Stop work on the affected portion if construction is ongoing.
Preserve the site and all project records.
Obtain the official permit set from the Office of the Building Official (OBO).
Have the construction independently measured and assessed by the appropriate licensed professionals.
Submit the discrepancy to the OBO and, where fire-safety systems are affected, the Bureau of Fire Protection (BFP).
Secure the required amendatory or corrective permits, complete the approved corrective work, and obtain final inspection and occupancy clearance.

An as-built drawing is a record—not a substitute for prior approval and not a way to legalize an unauthorized deviation.

Identify which documents do not agree

Four different records may be involved:

Permit-approved plans: The plans stamped or approved by the OBO and used as the basis for the building permit and ancillary permits.
Contract plans and specifications: The documents defining what the owner, developer, contractor, and consultants agreed to provide.
Actual construction: What physically exists on site, including concealed structural, electrical, mechanical, plumbing, sanitary, and fire-protection work.
As-built plans: The final record intended to describe the completed construction accurately.

The legal and practical response depends on the comparison:

Situation	Likely next step
Actual construction matches the approved plans, but the as-built drawing is inaccurate	Correct the as-built drawing through the appropriate licensed professional and resubmit it as required
Actual construction differs from the approved plans	Disclose the deviation to the OBO; obtain instructions on amendatory approval, testing, correction, removal, or reconstruction
Actual construction matches the approved plans but not the contract	Address both any safety issue and the separate contractual breach
The approved design itself is defective or code-noncompliant	The Building Official may still require plan corrections or stop the work
A developer delivered a unit or subdivision facility different from approved or advertised plans	Building-code remedies may apply alongside buyer remedies under housing laws
There is an immediate structural, fire, electrical, gas, or sanitation danger	Restrict access, stop use or work, and obtain emergency professional and government assistance

A discrepancy is not necessarily harmless merely because dimensions are close. A small-looking change can affect structural loads, setbacks, fire separation, exit capacity, accessibility, drainage, waterproofing, electrical loading, or another regulated system.

What Philippine building law requires

Changes need the Building Official’s approval

Section 304 of Presidential Decree No. 1096 provides that approved plans and specifications must not be changed, modified, or altered without the Building Official’s approval. The work must follow the approved documents.

Under the DPWH Revised Implementing Rules and Regulations of PD 1096, changes, modifications, and alterations during construction must be submitted to the Building Official, and the necessary amendatory permit must be issued before work on those changes starts.

There is no general national rule automatically excusing every “minor” field deviation. Ask the OBO for a written determination rather than relying on an informal assurance from a contractor, draftsman, inspector, or project employee.

The OBO can inspect and stop work

The Building Official may inspect a building or its premises at reasonable times to determine compliance. Work contrary to the Code or permit conditions may be stopped, with conditions imposed before it can resume. Permit non-issuance, suspension, or revocation may also result from:

Errors in the plans or specifications;
Incorrect or inaccurate information; or
Noncompliance with the Code or its rules.

Even an issued building permit does not authorize a Code violation. If approved plans are later found defective, the Building Official may require corrections and stop operations that violate the Code.

As-built plans must tell the truth

For occupancy processing, the implementing rules contemplate as-built plans that faithfully reflect changes made to the original OBO plans. Depending on the project, these may consist of an orderly compilation of the original plans and approved amendments or an accurate new set describing the completed structure.

They should not:

Show work that was never installed;
Hide an unauthorized relocation, deletion, or substitution;
Represent a structural member, exit, firewall, sprinkler, utility, or other feature as compliant without verification;
Be backdated;
Carry a professional’s signature or seal when that professional did not prepare, supervise, or properly verify the work within the lawful scope of practice; or
Be changed merely to obtain occupancy approval.

Architectural documents and professional seals are regulated by the Architecture Act of 2004 and the laws governing the other design professions. Verify professionals through the PRC license-verification service. If a contractor is required, its status can be checked through the PCAB license portal.

Occupancy requires more than a revised drawing

A building generally may not be used or occupied until the Building Official issues a Certificate of Occupancy. For completion and occupancy review, the OBO may examine the certificate of completion, construction logbook, inspection sheets, original plans, as-built plans, and applicable technical documents.

PD 1096 states that a Certificate of Occupancy shall be issued within 30 days when, after final inspection and submission of the certificate of completion, the building is found compliant. This is not automatic approval after 30 days; the compliance finding remains essential.

No occupancy permit, business permit, or permit to operate may be issued without the required Fire Safety Inspection Certificate under the Revised Fire Code of the Philippines.

What to do immediately

1. Address safety before paperwork

Stop work or restrict use in the affected area if the discrepancy involves, or may involve:

Columns, beams, slabs, foundations, retaining walls, roof framing, or load-bearing walls;
Removed reinforcement, undersized members, unapproved openings, or added loads;
Significant cracks, settlement, tilting, sagging, vibration, or water intrusion near structural elements;
Exits, stairs, firewalls, fire doors, alarms, sprinklers, standpipes, or smoke-control systems;
Main electrical equipment, conductor sizes, grounding, emergency power, or apparent overloading;
Fuel-gas systems, elevators, pressure equipment, or major mechanical installations;
Septic, sewerage, drainage, potable-water, or flood-control provisions; or
Required setbacks, easements, accessibility features, or property boundaries.

Do not remove, cover, patch, or reconstruct disputed work before it is documented, unless immediate action is necessary to prevent injury or further damage. Emergency shoring, shutdown, evacuation, or other protective work should be directed by qualified professionals and coordinated with the authorities when required.

2. Obtain the authoritative permit records

Ask the OBO where the property is located for certified or otherwise officially verifiable copies of the records you are entitled or authorized to obtain, including:

Building permit and permit conditions;
OBO-approved architectural and engineering plans;
Ancillary and accessory permits;
Approved revisions and amendatory permits;
Inspection records and notices;
Certificate of Completion;
Certificate of Occupancy or partial occupancy certificate;
Fire-safety evaluation and inspection documents;
Zoning, locational, development, or subdivision approvals, where applicable; and
Applications and supporting calculations relevant to the discrepancy.

Do not assume that the contractor’s “approved set” is identical to the OBO file. Compare revision numbers, dates, professional seals, approval stamps, and sheet indexes.

3. Commission an independent measured survey and technical assessment

Engage the appropriate PRC-licensed professionals for the affected disciplines. The assessment should ordinarily produce:

Verified dimensions and locations;
A drawing-by-drawing comparison of the OBO set, contract set, and actual work;
Photographs tied to drawing references;
Identification of concealed conditions that cannot yet be verified;
Structural calculations or system-capacity checks where necessary;
Material testing or scanning recommendations;
A list of Code, permit, safety, and contractual implications; and
Recommended correction and permitting options.

For concealed construction, the professional may recommend concrete scanning, selective opening, material tests, electrical testing, pressure tests, drainage tests, or other appropriate methods. Do not allow destructive testing without a safe method, clear responsibility for repairs, and proper documentation.

4. Notify the responsible parties in writing

Send a factual written notice to the contractor, developer, architect or engineer of record, construction supervisor, and other responsible parties. Include:

The exact discrepancy;
The sheets, specifications, rooms, or systems affected;
When and how it was discovered;
Any immediate safety restriction;
A request for approved change orders, field instructions, calculations, test reports, and amendatory permits;
A deadline consistent with the contract and urgency; and
An express reservation of rights.

Avoid making unsupported accusations. Ask each party to identify who instructed, designed, approved, installed, inspected, and documented the change.

If turnover or final acceptance is pending, place every known discrepancy on the punch list and written acceptance documents. Article 1719 of the Civil Code generally relieves a contractor from liability for accepted visible defects unless the employer expressly reserves rights; hidden defects not reasonably recognizable by the employer are treated differently.

5. Consult the OBO before attempting to “regularize” the work

Bring the permit set, comparison report, photographs, and relevant professional recommendations to the OBO. Ask in writing:

Whether an amendatory permit can still be processed;
Whether corrective or demolition permits are required;
Which revised plans, calculations, tests, and professional certifications must be submitted;
Whether work or occupancy must stop;
Whether reinspection of concealed work is necessary;
Whether existing occupancy approval must be amended, suspended, or reissued; and
Whether other offices must approve the correction.

If the work has already been completed without the required prior approval, state that accurately. The OBO may require correction, exposure and inspection of concealed work, testing, revised calculations, payment of assessed fees or fines, or removal of noncompliant construction. Filing an as-built plan does not guarantee approval.

6. Coordinate with other regulators

Depending on the discrepancy, approval may also be needed from:

The BFP for fire-safety features;
The local zoning or planning office;
The subdivision or condominium regulator;
Utility providers;
Environmental, sanitation, accessibility, aviation, heritage, or other authorities; or
A homeowners’ or condominium association, where valid project restrictions apply.

The BFP may stop work on a portion being built without, or contrary to, approved fire-safety plans or clearances. Fire hazards must be abated immediately. A Fire Code notice to comply ordinarily specifies a 10-to-15-day period, but an imminent danger may justify more urgent action.

7. Complete the approved correction and close the record

After receiving written approvals:

Use the approved correction documents on site;
Record inspections, tests, weather, progress, and concealed work in the construction logbook;
Photograph relevant work before it is covered;
Obtain signed test results and material certificates;
Secure written acceptance of each correction by the proper professional and inspector;
Update the as-built plans to match the verified final condition; and
Complete final OBO and BFP inspections before occupancy or continued use.

Evidence to preserve

Keep original files and create backed-up, read-only copies of:

Every version of the plans, specifications, schedules, and bill of quantities;
Building, ancillary, amendatory, occupancy, and fire-safety permits;
Construction logbooks and inspection sheets;
Contracts, proposals, scope documents, warranties, and payment records;
Change orders, variation orders, site instructions, requests for information, and submittals;
Emails, text messages, meeting minutes, and transmittal receipts;
Daily reports, delivery receipts, material certificates, and test results;
Dated photographs and videos, preferably with a scale and identifiable location;
Drone, laser-scan, total-station, or other survey data;
Punch lists, turnover records, and written reservations;
Names and license details of designers, supervisors, contractors, and inspectors; and
Notices, orders, and communications with the OBO, BFP, developer, or association.

Preserve native electronic files and metadata. Do not write over the only copy of a CAD or building-information-model file.

Contractual responsibility and possible remedies

The government permitting issue and the private contract dispute are related but separate. OBO approval does not necessarily prove that the contractor delivered what the contract required, and contractual approval does not replace government approval.

Under the Civil Code of the Philippines:

Contracts must be performed in good faith.
A contractor must execute the work with the agreed qualities and without defects that destroy or reduce its value or fitness.
An employer may require removal of a defect or replacement of defective work. If the contractor refuses, the employer may potentially have the correction performed at the contractor’s cost, subject to the contract, proof, proper notice, and required permits.
For a stipulated-price project, a contractor generally cannot claim an increase based on a change in plans unless the proprietor authorized the change in writing and both parties determined the additional price in writing.
A contractor is responsible for work done by people it employs.
Acceptance may affect claims for visible defects, making written reservations particularly important.

Available relief may include correction, specific performance, recovery of reasonable repair costs, price adjustment, damages, or—in sufficiently substantial breaches—resolution of the contract. The proper remedy depends on the contract, the seriousness of the deviation, acceptance documents, causation, proof of loss, and whether correction is feasible.

Do not immediately hire another contractor, demolish the disputed work, withhold all payment, or offset costs without reviewing notice, cure, certification, retention, termination, and dispute-resolution provisions. Necessary emergency work should still be carefully documented.

If the contract contains an arbitration agreement, construction disputes involving specifications, workmanship, defects, payments, delays, or changes may fall within the Construction Industry Arbitration Commission’s jurisdiction under Executive Order No. 1008.

Special situations

Subdivision or condominium buyers

If a developer delivered a subdivision facility, condominium unit, common area, or promised development that does not match approved or represented plans, PD 1096 may apply together with buyer-protection laws.

Section 22 of Presidential Decree No. 957 restricts unauthorized changes to roads, open spaces, infrastructure, public-use facilities, and other subdivision developments shown in approved plans or advertisements. Regulatory permission and the required written consent of the homeowners’ association—or, in its absence, the majority of lot buyers—may be necessary.

The Human Settlements Adjudication Commission has original jurisdiction over specified claims by subdivision or condominium buyers or homeowners, including claims for refund, specific performance, and certain unsound real-estate practices under Republic Act No. 11201. Jurisdiction depends on the parties, project, and cause of action; not every property dispute belongs before the HSAC.

Government projects

Government projects may also be governed by procurement law, approved variation orders, agency design manuals, Commission on Audit requirements, and the particular government contract. Do not treat a site instruction or contractor-prepared as-built plan as a substitute for the approvals required by the procuring entity.

Older buildings

A building’s age does not automatically excuse new unauthorized work. PD 1096 generally applies to alterations, additions, conversions, and repairs even when the original building predates the Code. The exact requirements depend on when the disputed construction occurred, its nature, and applicable local and referral codes.

Deadlines and enforcement risks

Act promptly. Relevant periods may include:

A building permit becomes void if authorized work is not commenced within one year, or if commenced work is suspended or abandoned for 120 days.
An appeal from written non-issuance, suspension, or revocation of a permit must generally be filed with the DPWH Secretary within 15 days from receipt. PD 1096 states that the Secretary should decide within 15 days, subject to review by the Office of the President.
A Fire Code notice to comply generally provides 10 to 15 days, while imminent fire hazards require immediate attention.
Civil Code actions based on a written contract generally have a 10-year period from accrual; oral-contract actions generally six years; and actions for injury to rights or quasi-delict generally four years. Classification and accrual are often disputed.
Article 1723 contains a special rule for an actual building collapse caused by specified design, ground, construction, material, or contract defects: the collapse must occur within 15 years from completion, and the action must be brought within 10 years following the collapse.

These periods are not interchangeable. Contractual notice, warranty, insurance, arbitration, government-claim, and special-law deadlines may be much shorter. The Civil Code recognizes that a written extrajudicial demand may interrupt prescription, but a demand letter is not a safe substitute for filing the proper action on time.

Possible government consequences include stop-work orders, permit suspension or revocation, discontinuance of occupancy, required repair, vacation or demolition of a dangerous building, and administrative or criminal proceedings. PD 1096 authorizes administrative fines up to ₱10,000 and, upon conviction, a fine up to ₱20,000, imprisonment up to two years, or both. The Fire Code separately permits an administrative fine up to ₱50,000, stoppage of operations, closure, or both; payment does not remove the obligation to correct the deficiency.

Common mistakes to avoid

Letting the contractor redraw the as-built plans without an independent site check;
Assuming an engineer’s, architect’s, foreman’s, or inspector’s verbal approval is an amendatory permit;
Describing unauthorized work as an “as-built adjustment” without telling the OBO;
Covering reinforcement, utilities, fire stopping, or other concealed work before documentation and inspection;
Signing a Certificate of Completion that is not accurate;
Backdating change orders, permits, professional certifications, or inspection records;
Treating an occupancy certificate as a warranty that the project matches the private contract;
Accepting turnover without a detailed punch list and express reservation of rights;
Making structural or fire-safety corrections without approved plans;
Relying only on photographs when measurements, calculations, or material tests are needed;
Ignoring the arbitration or dispute-resolution clause; or
Waiting for the warranty period to expire before obtaining professional and legal advice.

When help is urgent

Seek immediate assistance from the appropriate licensed professional, OBO, BFP, and a Philippine lawyer if:

There is movement, major cracking, settlement, sagging, or possible structural instability;
An exit, firewall, alarm, sprinkler, electrical protection, or other life-safety system was removed or materially changed;
Someone has been injured or nearby property is threatened;
The OBO or BFP has issued a stop-work, vacation, closure, suspension, revocation, or abatement order;
A professional is being asked to sign or seal plans they did not prepare or verify;
Records appear altered, backdated, or intentionally false;
Concealed work must be opened before evidence is lost;
Turnover, final payment, acceptance, warranty, insurance, or filing deadlines are approaching;
The contractor or developer is insolvent, abandoning the project, or removing records; or
The discrepancy affects multiple buyers, common areas, subdivision infrastructure, or public safety.

Frequently asked questions

Can inaccurate as-built plans simply be corrected?

Yes, if the plans themselves are wrong and the verified construction otherwise conforms to the approved documents and applicable requirements. The correction should be prepared, signed, and sealed by the appropriate licensed professional and submitted through the OBO process. If the construction—not just the drawing—deviates from the approved plans, correcting the paper alone is insufficient.

Can an amendatory permit be obtained after the change was built?

The rules require approval before changed work starts. If the work already exists, disclose it to the OBO and ask for the required corrective process. The OBO may require revised plans, calculations, tests, exposure of concealed work, correction, or removal. Approval is not guaranteed.

What if the contractor says the change is “minor”?

Ask the OBO for a written determination. A visually small change may affect a regulated dimension, system, or safety requirement. A private party’s opinion does not bind the Building Official.

Does a Certificate of Occupancy cure the discrepancy?

Not necessarily. It does not rewrite the construction contract or guarantee that hidden conditions match the approved plans. Occupancy certificates may also be suspended or revoked under applicable procedures when material noncompliance is established.

Who should pay for correction?

That depends on who caused or authorized the discrepancy, whether the change was approved in writing, the contract allocation of design and construction risk, acceptance and warranty documents, and whether the work is defective or merely different. Obtain a technical causation report before assigning responsibility.

Should the owner sign the Certificate of Completion?

Only after confirming that every statement is accurate and supported. Do not sign or ask a professional to sign a certification stating that work conforms to approved plans when a material unresolved deviation is known.

May the building remain occupied while the issue is assessed?

Only if lawful occupancy approvals remain effective and qualified professionals and authorities do not identify a safety reason to restrict use. Where structural, fire, electrical, gas, or sanitation risks may exist, safety takes priority over continued operation.

Where should a complaint be filed?

Permit and Code compliance ordinarily begins with the local OBO and, for fire matters, the BFP. Contract disputes may go to court or CIAC arbitration depending on the agreement. Qualifying subdivision or condominium buyer claims may belong before the HSAC. A lawyer should identify the correct forum from the parties, contract, relief requested, and governing law.

Official sources

This article provides general Philippine legal information, not legal or engineering advice for a particular project. Requirements may also depend on local ordinances, permit conditions, professional findings, contracts, and project-specific documents. Sources and procedures were checked as of July 20, 2026.