Short answer: the ten mistakes below all share one root cause — moving faster than the project's information supports. Starting before design is done, picking a contractor on price alone, skipping the soil investigation, and the rest are all versions of deciding before you actually know enough to decide.
An owner under schedule pressure authorizes site work or foundation pours while architectural or MEPFS details are still being finalized. Every subsequent design change either gets built wrong or forces demolition and rework — both slower and more expensive than the delay the owner was trying to avoid.
Breaking ground with only architectural drawings, before structural and MEPFS design is complete, leaves the contractor guessing on member sizes, routing, and equipment loads. What looks like faster progress on site is actually construction happening ahead of the information needed to do it correctly once.
Price is one input, not the whole decision. Track record, crew quality, equipment, financial capacity to sustain the project, and whether the low bid actually covers full scope all matter — a bid that's unrealistically low is often missing scope that resurfaces later as change orders, usually at a worse price than paying fairly up front.
Electrical, mechanical, plumbing and fire protection systems get sketched in after the architectural and structural design is "done," instead of coordinated alongside it. This is exactly the clash pattern covered in our design coordination guide — ceiling clearance, equipment loads and structural penetrations all depend on MEPFS being in the room from the start, not called in at the end.
Clearing, grading, drainage, access roads and utility connections vary enormously by site condition and are easy to underestimate from a generic budget template. A site that looks straightforward on a map can carry real grading or drainage cost once an actual survey is done.
Foundation design depends on the soil's actual bearing capacity at the specific site — not a neighboring lot's, not a general assumption. Skipping this step risks either an underdesigned foundation that settles or cracks later, or an overcautious one that costs more than necessary. It's inexpensive relative to the building it supports.
A layout or finish change requested after materials are ordered and framing is up doesn't just add new work — it adds the cost of undoing what's already built, plus the schedule delay while every discipline re-coordinates around the change.
Under the National Building Code (PD 1096) and its IRR, construction requires an approved building permit before it starts. LGU processing time varies by city and season and is not something the design team or contractor controls — a schedule with zero buffer for permitting is a schedule that will slip on day one.
Budgeting only for the visible construction cost while leaving out design fees, permits, site development, contingency and fit-out (see our budget allocation guide for how these actually split) sets the project up to run short exactly when it's hardest to raise more money — mid-construction.
When decisions get made by whoever happens to be on-site that day — a manager, a relative, a rotating staff member — the design team and contractor get inconsistent instructions and nobody owns the final call. One named decision-maker, empowered to approve changes and answer questions promptly, keeps the project moving at the pace the design and construction teams actually need.
Check off what's true for your project. This flags which of the ten mistakes above you may still be exposed to — it isn't a substitute for an actual project review.
AEDO's role outside Negros Oriental. Nationwide, AEDO helps business owners avoid these mistakes through complete, coordinated design — architectural, structural, electrical, sanitary — plus remote oversight of a contractor the client hires locally. In Negros Oriental, AEDO designs and builds the project directly.
Should I choose a contractor based on lowest price alone?
No. Lowest price alone tells you nothing about a contractor's track record, crew quality, financial stability, or whether the bid actually covers full scope. An unrealistically low bid is often missing scope that surfaces later as change orders, which usually costs more than paying a fair price up front to a qualified contractor.
Who is liable if a commercial building has structural problems after construction?
Under Article 1723 of the Civil Code of the Philippines, an engineer or architect who drew the plans and specifications, and the contractor who built the structure, are liable for damages if the building collapses within 15 years from completion due to a defect in those plans or in the soil, or from defects in the construction. Liability is solidary where the engineer or architect also supervised the construction. This is a real, time-limited legal exposure, not an abstract risk.
Why is skipping a geotechnical investigation a costly mistake?
Foundation design depends on the soil's actual bearing capacity, which varies by site and cannot be reliably guessed from a neighboring lot or a general assumption. Skipping the investigation risks either an underdesigned foundation that settles or cracks later, or an overly conservative one that costs more than necessary — both outcomes a soil investigation is cheap insurance against relative to the cost of the building above it.
Does AEDO build commercial projects for business owners outside Negros Oriental?
AEDO designs and builds commercial projects directly in Negros Oriental. Outside that province, AEDO provides the complete design package plus remote construction oversight of a contractor the client hires locally, and does not claim to physically construct buildings nationwide.
Statutes referred to in this article, linked to their source.
The ten mistakes themselves are drawn from AEDO's own project experience with commercial clients, not a single published industry study.
A design and planning process built to catch these ten problems before they become expensive.
