Building renovation in Lebanon often means working with an asset that has a long operating history, partial records, previous interventions and systems installed at different times. The technical strategy should begin by reducing uncertainty.
Verify the existing asset before designing the intervention.
Old drawings can be useful, but they should not be treated as proof of current conditions. The building may have been altered after construction, and later works may not have been recorded consistently.
Early surveys should confirm geometry, levels, structural elements, service routes, plant locations, shafts, risers and accessible records. Selective opening-up may be justified where critical conditions cannot be verified visually.
The purpose is not to investigate every centimetre of the building. It is to identify which assumptions could materially affect design, cost, programme or safety if they prove wrong later.
Understand what the existing structure can support.
Renovation can introduce new loads through partitions, equipment, façade systems, rooftop installations, water tanks, plant, feature stairs or changes in use. Structural changes may also be required for new openings, circulation or vertical services.
The appropriate level of structural review depends on the scope of the intervention and the condition of the building. The team may need to verify member sizes, reinforcement, material condition, signs of distress and the relationship between the proposed work and the existing load path.
Where deterioration, cracking or previous structural modification is visible, assumptions should be investigated before new work hides the condition.
Yehya Group's engineering capability can support the coordination of structural requirements with architecture and construction planning.
Existing MEP systems need capacity checks, not assumptions.
Electrical, mechanical and plumbing systems often become one of the main constraints in refurbishment. A new use may need more electrical power, additional cooling, different ventilation, greater water demand, new drainage connections, upgraded controls or additional life-safety systems.
Even when existing equipment remains operational, the team should consider whether it can support the proposed use reliably. Age, maintainability, spare capacity, controls compatibility and access for service should all inform the decision to retain, modify or replace.
Partial replacement also creates interfaces between old and new systems. Those interfaces need clear responsibility, testing criteria and documentation so that future maintenance teams understand what was changed.
Water, façades and roofs deserve early attention.
Interior renovation can be undermined by unresolved external-envelope problems. Water ingress, failed sealants, damaged waterproofing, drainage issues or façade defects can damage new finishes and create recurring maintenance problems.
Before high-value interior work is completed, the project should understand whether the building envelope is performing as expected. Roofs, terraces, balconies, external joints, windows and service penetrations may require inspection depending on the asset and the observed condition.
Where repairs are necessary, they should be coordinated with access, temporary protection and the wider refurbishment sequence.
Life-safety and access requirements should be coordinated as one system.
Changes to layouts or building use can affect escape routes, compartmentation, fire detection, suppression, emergency lighting, accessibility and the way occupants move through the property.
Requirements vary by project, authority, building type and proposed use, so they should be verified for the specific property rather than copied from another project. The design team should also make sure architectural, MEP and specialist systems respond to the same approved strategy.
Late changes to these systems can affect ceilings, doors, partitions, services and finishes, making early coordination especially important.
Plan refurbishment around investigation, demolition and release of workfronts.
Unlike new construction, refurbishment often reveals conditions progressively. Demolition and strip-out may expose additional services, hidden damage or differences from the design assumptions.
The construction sequence should therefore include controlled investigation points. Some design decisions may need to remain open until specific areas are exposed, while other packages can proceed with confidence.
For occupied buildings, phasing may also need to protect residents, tenants, staff or public access. Dust, noise, temporary services, access control and service interruptions become part of the delivery plan.
Plan investigation around the decisions the project needs to make.
Existing-building investigation should be risk-based. The objective is not to survey everything simply because the building is old. The objective is to reduce uncertainty where an incorrect assumption could change the design, budget, programme or safety strategy.
Start with records, then verify what matters physically.
Available architectural, structural and MEP drawings can help the team understand the original design intent, but records should be treated as evidence to be verified rather than an exact description of the current building. Previous tenant works, repairs, alterations and equipment replacement may have changed the asset over time.
The team can use existing records to plan targeted surveys: structural opening-up where new loads or penetrations are proposed, service tracing where routes affect the new layout, or equipment checks where capacity and remaining condition influence the refurbishment strategy.
Use intrusive surveys selectively.
Some important conditions are hidden behind finishes, ceilings or walls. Opening-up can be valuable, but it should be planned around specific questions. Random demolition creates cost and disruption without necessarily improving the design basis.
A useful opening-up schedule identifies the location, the condition to be verified, who needs to inspect it and how the area will be made safe and reinstated. Findings should then be recorded so the information becomes part of the controlled project basis.
Make retain-versus-replace decisions deliberately.
Existing equipment and systems should not automatically be replaced because they are old, nor retained simply because they are still operating. The decision should consider condition, capacity, efficiency, compatibility, spare-parts availability, remaining service life, maintenance history and the consequence of failure.
For major systems, the project may compare the capital cost of replacement against the operational and maintenance risk of retention. This creates a more informed lifecycle decision rather than a purely construction-cost decision.
Plan for occupied or partially occupied buildings.
Refurbishment becomes more complex when part of the property must remain operational. Temporary routes, protection, noise, dust, fire strategy, service shutdowns and contractor access may all need to be separated from occupied areas.
In these conditions, phasing is not only a programme decision. It becomes part of the technical design because temporary works and temporary services may be required between phases.
Carry survey findings into procurement and site controls.
Investigation loses value if the findings remain in a survey report that later teams do not use. Critical existing conditions should be reflected in the design, tender information, risk register, construction method and contractor scope where relevant.
This is one reason Yehya Group's combination of engineering, technical services and construction capabilities can be useful on refurbishment projects: the investigation can be connected to the decisions that follow instead of treated as a separate preliminary exercise.
Common questions about building renovation in Lebanon.
Should an existing building be surveyed before renovation?
Yes. The level of survey should reflect the scope and risk of the project, but critical existing conditions should be verified before design and procurement depend on them.
Can existing electrical and mechanical systems be reused?
Potentially, but condition, capacity, compatibility and maintainability should be assessed against the proposed use before retention is confirmed.
When should technical investigations happen?
As early as practical. Investigations that can materially change scope, cost or design are most valuable before major procurement or construction commitments are made.
Yehya Group viewpoint
Existing buildings need coordinated technical judgement.
Yehya Group combines engineering, technical services, construction management, general contracting, architecture and facility-management capabilities that can support refurbishment projects in Lebanon.
The emphasis is on connecting investigation to design, design to execution and execution to the long-term operation of the asset. A refurbishment project is strongest when each decision considers both what already exists and what the building needs to become.