Old house renovation in Malaysia involves upgrading structural integrity, electrical and plumbing systems, and interior layouts to improve safety, functionality, and modern living standards while complying with local regulations.

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What is considered an old house in Malaysia?

An old house typically refers to a property that is 15–20 years or older, often featuring:

• Outdated electrical wiring

• Aging plumbing systems

• Worn structural components

• Inefficient space layouts

Such houses usually require more than cosmetic upgrades.

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Why renovate an old house instead of rebuilding?

Renovating an old house can be more practical than rebuilding when:

• The structure is still sound

• The location is desirable

• Rebuilding approval is complex or restricted

• Budget constraints exist

Renovation allows homeowners to modernize while preserving existing foundations.

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Key areas to inspect before renovating an old house

Structural condition

• Cracks in walls or beams

• Uneven floors

• Roof leakage or termite damage

A structural assessment is recommended before design planning.

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Electrical and plumbing systems

Old houses often use outdated wiring and piping that:

• Do not meet current safety standards

• Cannot support modern appliances

Upgrading these systems is usually necessary.

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Waterproofing and drainage

Poor waterproofing can lead to:

• Damp walls

• Mold growth

• Long-term structural damage

This is a critical but often overlooked area.

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Step-by-step old house renovation process

Step 1: Site inspection and condition assessment

Professionals inspect the structure, utilities, and existing layout to determine what can be retained or must be replaced.

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Step 2: Interior design and space planning

Designers:

• Reorganize layouts for better flow

• Improve lighting and ventilation

• Integrate modern living requirements

Design planning should always come before renovation work.

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Step 3: Renovation permit application

Depending on scope, permits may be required from:

• Local councils (e.g., DBKL)

• Property management (for strata properties)

Structural changes almost always require approval.

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Step 4: Demolition and upgrading works

This stage may include:

• Hacking walls and floors

• Reinforcing structures

• Replacing electrical and plumbing systems

Older homes usually require more extensive preparation work.

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Step 5: Finishing and restoration

Includes:

• Flooring and wall finishes

• Carpentry and cabinetry

• Painting and lighting installation

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Step 6: Inspection and handover

Final inspections ensure safety, compliance, and workmanship quality before occupancy.

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Common challenges in old house renovation

Hidden defects

Issues such as hidden water damage or termite infestation often appear after demolition.

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Higher renovation costs

Old house renovations may cost more due to:

• Structural reinforcement

• Full system replacements

• Unforeseen repairs

A contingency budget is strongly recommended.

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Compliance with current regulations

Older houses may not meet current building codes and require upgrades to comply.

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Estimated cost of old house renovation in Malaysia

Renovation costs vary based on condition and scope:

Renovation Scope	Estimated Cost
Basic upgrade	RM100 – RM150+ per sq ft
Partial overhaul	RM150 – RM200+ per sq ft
Full renovation	RM200 – RM300+ per sq ft

Actual costs depend on materials, workmanship, and site condition.

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Tips for a successful old house renovation

• Conduct a professional site inspection first

• Prioritize safety over aesthetics

• Allocate 10–20% contingency budget

• Work with experienced renovation specialists

• Finalize design before construction

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When is rebuilding a better option?

Rebuilding may be more suitable if:

• Structural damage is severe

• Renovation costs exceed rebuilding costs

• Layout limitations cannot be resolved through renovation

A professional assessment helps determine the best option.

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Final thoughts

Old house renovation in Malaysia requires careful planning, technical expertise, and compliance with regulations. When done correctly, it can significantly improve comfort, safety, and long-term property value.