Early on May 24, 2026, a nine-storey building under construction in Balibago, Angeles City, collapsed. There was no earthquake. Thirty people died. Construction workers were reportedly sleeping inside when it fell. Here is what investigators have reported so far, and what any building owner can take from it.

Silangan was not involved in this project. This summary is based on published news reports as of late October 2026. Investigations and cases are ongoing, and no one has been found liable by a court.

What investigators found

The Angeles City Fact-Finding and Investigation Task Force released its final report in late September 2026. It called the overstressing of the building’s columns and piles the “highly probable” main cause of the collapse. In plain terms, the columns and the foundation piles under them were carrying more load than they could take.

The report linked that to changes made during construction. Steel beams and extra flooring were added that the original design didn’t account for. The approved permit covered nine storeys, but a swimming pool was reportedly being built on a tenth level. The city’s mayor said the changes were allegedly made without permits or approved revisions from the Office of the Building Official. The report also cited construction and detailing errors.

Separately, the National Bureau of Investigation said it had linked substandard steel bars to the building, and a materials analysis by the Department of Public Works and Highways was still pending in late September. The Department of Labor and Employment ordered the contractor and owner to pay ₱11.49 million in unpaid wages and fines, and the city said it would review how it issues and monitors building permits.

Four lessons for building owners

1. Every change to the approved plans needs an engineer’s check

A structure is designed for specific loads. An extra floor, a roof deck, a steel mezzanine, a water tank, or a pool all add weight, and that weight travels down through the beams and columns to the foundation. A pool is a good example of how much that can be: water 1.5 metres deep weighs about 1.5 tonnes on every square metre. That’s more than seven times the live load a typical residential floor is designed for under the National Structural Code of the Philippines.

Diagram of a four-storey frame with a pool added on the roof. Red arrows show the pool’s weight travelling down the columns and into the foundation piles. 123
  1. Added load: a rooftop pool. Water 1.5 m deep adds about 1.5 tonnes per square metre.
  2. Columns carry that weight down, floor by floor, on top of everything already above them.
  3. Foundation piles carry it all into the ground. If they weren’t designed for it, they’re overstressed too.

Illustration, not to scale.

Before any change, have a structural engineer check whether the building can take it, and get the revised plans approved by the building official.

2. Check the work while it can still be seen

Once concrete is poured, the steel inside it is hidden. Detailing errors, such as missing bars, wrong spacing, or poor splices, are easiest to catch before the pour. Regular checks during construction, against the approved plans, are far cheaper than finding a problem later.

3. Test the materials

Plans assume a certain strength of steel and concrete. Ask for mill certificates and test results for reinforcing bars, and have concrete samples tested as the work goes on. For a building that already exists, concrete coring and rebar scanning show what was actually built.

4. Don’t forget the foundation

In this case the piles were overstressed along with the columns. Load added at the top of a building ends up in the foundation. An engineer checking a change should follow the load all the way down, not just check the floor where the change is made.

If you’re building or renovating

  • Keep a copy of the approved structural plans on site, and build to them.
  • Route every change through the engineer of record, and get it approved before building it.
  • Ask for an independent check if something doesn’t match the plans, or if you aren’t sure.
  • Watch for cracks in columns or beams, sagging, or new cracking around openings during construction, and stop work until they’re checked.

Planning a change, or worried about work in progress? We can check the plans, the work, or the materials.

Ask for a second opinion

Sources