Home Extension Design
& Construction
in
Phnom Penh
Many homeowners in Phnom Penh eventually face the same challenge: their home no longer fits their lifestyle.
Whether your family is growing, you need a home office, or you simply want more living space, moving to a new house is not always the best solution.
A well-planned home extension can increase usable space, improve daily comfort, and add long-term property value without the cost and disruption of relocating.
At SALA DECOR, we help homeowners evaluate whether extending an existing home is the right investment and how to maximize both functionality and property value.
Many homes in Phnom Penh are built with future expansion in mind. Whether it is an unfinished upper floor, rooftop space, or an area reserved for future development, homeowners often have opportunities to increase their living space without relocating.
As families grow and lifestyles change, additional bedrooms, home offices, family lounges, or rental spaces may become necessary. Rather than moving to a new property, many homeowners choose to extend their existing homes and make better use of the space they already own.
However, a successful home extension requires more than simply adding walls and rooms. Careful planning, thoughtful design, and proper space utilization are essential to ensure the extension improves comfort, functionality, and long-term property value.
At SALA DECOR, we help homeowners evaluate extension possibilities, optimize layouts, and create practical living spaces that support both current needs and future goals.
Why Homeowners Choose Home Extensions in Phnom penh
The Problem Is Not Where You Live. The Problem Is That Your Home No Longer Supports Your Lifestyle.
Lifestyle & Family Reasons
The Location Is Perfect, But the House Feels Too Small
​Your home may already be close to schools, markets, workplaces, and daily conveniences. Moving to a new house could mean giving up a location that already supports your family's lifestyle.
Your Family Has Grown
As children grow older or additional family members move in, the home that once felt spacious may no longer provide enough privacy, comfort, or functional living space.
Your Children Are Already Settled in School
Many families prefer to keep their children in a familiar school environment. Moving to a new area may require changing schools, disrupting friendships, routines, and educational continuity.
Family Support Is Nearby
Living close to parents, relatives, or family members can provide valuable support for childcare, daily activities, and emergencies. Relocating may reduce this important support network.
Space & Functionality Reasons
You Need a Home Office
With more people working remotely or managing businesses from home, creating a dedicated workspace can improve productivity without sacrificing bedrooms or shared living areas.
​Unused Space Exists
An unfinished upper floor, rooftop, side yard, or backyard may offer opportunities to create additional living space without the cost and disruption of moving to a new property.
Moving May Create New Challenges
A larger house in a different location may introduce longer commutes, unfamiliar surroundings, increased daily expenses, and other challenges that affect your quality of life.
You Know Your Neighbors
​Strong relationships with neighbors often take years to build. Many homeowners value the trust, familiarity, and sense of community that comes from staying in an established neighborhood.
Property Value & Investment Reasons
Moving Is More Expensive Than Expected
Buying a larger home often involves additional costs such as moving expenses, renovations, legal fees, and furnishing new spaces. Extending an existing home may be a more cost-effective solution.
Your Property Has More Potential
​Many properties have unused development potential. A well-planned extension can improve functionality, increase usable space, and enhance long-term property value.
Adapt the Property for Business Use
​As neighborhoods grow, residential properties may gain commercial potential. Extensions can create office space, retail areas, showrooms, or other business opportunities without relocating.
​Create Additional Rental Income
Unused areas such as upper floors or separate sections of a property may be converted into rental units, helping homeowners generate additional income from their existing investment.
Popular Second Floor Extension Ideas for Homes in Phnom Penh
Add Extra Bedrooms for a Growing Family
One of the most common reasons for a second-floor extension is creating additional bedrooms as children grow older or family members move in.
Create a Family Lounge or Multi-Purpose Room
Additional upper-floor space can become a TV room, study area, hobby room, or flexible family gathering space.
Create a Dedicated Home Office
​An upper floor can be transformed into a quiet workspace for remote work, business management, or study without affecting the main living areas.
Create Rental Rooms for Additional Income
Unused upper-floor space can be converted into rental rooms or a separate living unit to generate long-term income.
Build a Private Living Area for Parents
Many families choose to create a separate bedroom and bathroom for parents or elderly family members while keeping everyone under the same roof.
Increase Property Value Through Additional Living Space
Adding usable floor area can improve functionality and increase the long-term value of the property.
Home Extension Styles Explained
Classic Style
Modern Style
Comtemporary Style
Before You Build: Planning Your Home Extension the Right Way
Many homeowners focus on construction costs first. However, successful home extensions usually begin with planning, design, and understanding how the new space will support future needs.
Understand Your Goals
Develop a Design and Budget Plan
​Evaluate Existing Space and Structure
Build with Confidence
Home Extension Planning Options
Initial Consultation
-
Site Visit
-
​Concept Discussion
-
Rough Sketch
-
Budget Estimate
-
​Suitable for Early Decisions
​
​
​
​
​
​
​
​Design & Planning Package
-
Full Design
-
Layout Planning
-
3D Visualization
-
Detailed Budget Planning
-
Suitable Before Construction
How Much Does a Home Extension Cost in Phnom Penh?
The cost of a home extension depends on the size, design complexity, materials, finishes, and existing conditions of the property.
What Affects Home Extension Costs?
Extension Size
Larger extensions generally require more materials, labor, and construction time.
Design Complexity
Custom layouts, larger openings, staircases, and specialized spaces may increase project costs.
​Materials & Finishes
Flooring, wall finishes, windows, doors, and built-in furniture all influence the final budget.
Mechanical & Electrical Systems
​Lighting, air conditioning, plumbing, and electrical upgrades can significantly affect project costs.
​Existing Conditions
Every property is different. Existing layouts and site conditions often influence both design solutions and construction requirements.
​Permit & Approval Requirements
​Some home extension projects may require approvals from developers, property management, or local authorities. These requirements can affect both project timelines and overall costs.
​Every home extension project is different. Understanding these factors early helps homeowners make informed decisions and establish realistic budgets before construction begins.
Typical Home Extension Budget Ranges in Phnom Penh
The figures below are intended as general budget guidelines. Every home is different, and detailed pricing is usually developed after design planning and site evaluation.
01
Small Home Extension
Suitable for adding a small room, home office, or functional space.Starting from: 5xxx
02
Medium Home Extension
Suitable for multiple rooms or upper-floor development projects.
Starting from: 1xxx
03
Large Home Extension
Suitable for major expansions, multi-room additions, or investment-focused projects.
Starting from: 2xxx
Construction costs can often be estimated based on area and project scope. However, interior finishes, furniture, materials, and lifestyle requirements can significantly affect the final investment. Detailed pricing is typically developed after design and planning are completed.
Frequently Asked Questions About Home Extensions in Phnom Penh
Planning & Design
Do I Need a Design Before Extending My Home?
A design helps homeowners understand space planning, project scope, and estimated costs before construction begins. It also reduces costly changes during construction and helps ensure the new space supports long-term needs.
​Can I Build the Structure First and Complete the Interior Later?
Yes. Many homeowners choose to complete the structural extension first and finish interior work later according to their budget and priorities. This approach allows additional living space to be created while maintaining greater control over future spending.
Can I Extend My Home in Stages?
Yes. Some homeowners choose to complete their projects in phases. For example, structural work may be completed first, while interior finishes, built-in furniture, and decorative upgrades can be added later.
Budget & Costs
How Much Does a Home Extension Cost in Phnom Penh?
The cost of a home extension depends on project size, design complexity, materials, finishes, and construction requirements. Most homeowners begin with planning and design before receiving detailed pricing.
How Is the Budget Calculated?
Budgets are typically developed based on extension size, design requirements, material selections, and construction complexity. Every home is different, which is why detailed planning is important before final pricing is prepared.
Construction & Timeline
How Is the Budget Calculated?
​Project timelines vary depending on design requirements, approvals, project size, and construction complexity. Smaller projects may take only a few weeks, while larger extensions may require several months.
​Can I Continue Living in My Home During Construction?
In many cases, yes. However, this depends on the location of the extension and the level of construction activity. Safety, access, and comfort should always be considered during the planning stage.
​Do I Need Approval Before Extending My Home?
Some projects may require approvals from developers, property management companies, or local authorities. Requirements vary depending on the property type and location.
Property Value & Future Planning
Will a Home Extension Increase Property Value?
​A well-planned extension can improve functionality, increase usable living space, and enhance overall property appeal, which may contribute to higher long-term property value.
Is It Better to Extend My Home or Move to a New House?
For many homeowners, extending an existing home may be worth considering when the location, schools, community, workplace access, and daily conveniences already support their lifestyle.
Can Additional Space Be Used for Rental Income?
Yes. Additional rooms, independent living areas, or flexible-use spaces may provide opportunities for rental income or future business use, depending on local regulations and property conditions.
Working With SALA DECOR
Can SALA DECOR Help With Both Design and Construction?
Yes. SALA DECOR assists homeowners with planning, design development, budgeting, and construction coordination to help ensure the extension supports both current needs and future goals.
Why Choose SALA DECOR for Your Home Extension Project?
​We Focus on Planning Before Construction
A successful home extension begins long before construction starts. SALA DECOR helps homeowners evaluate options, explore possibilities, and develop practical solutions before making major investment decisions.
​We Help Homeowners Make Better Long-Term Decisions
​Home extensions often affect how a family lives for many years. We focus on solutions that support future needs, improve functionality, and contribute to long-term property value.
​We Understand Homeowners in Phnom Penh
​Many homeowners want additional space without leaving the neighborhoods, schools, workplaces, and communities they already know. We help transform existing homes into spaces that better support changing lifestyles and future goals.
​We Understand Both Extension and Interior Design
Additional space is only valuable when it functions well. By considering layout, circulation, natural light, ventilation, and future interior planning, we help create spaces that are both practical and comfortable.
​We Provide Clear Planning and Budget Guidance
Every project is different. Our goal is to help homeowners understand project scope, planning requirements, and realistic budget expectations before construction begins.
Whether you are planning a new room, expanding an upper floor, or exploring future possibilities for your property, SALA DECOR can help you develop a practical plan and move forward with confidence.
Ready to Plan Your Home Extension?
Planning a home extension is about more than adding space. It is an opportunity to improve functionality, comfort, and long-term property value while continuing to enjoy the location and community you already know.
Whether you are considering an additional bedroom, a home office, an upper-floor extension, or a future investment opportunity, SALA DECOR can help you evaluate possibilities, understand realistic budgets, and develop a practical plan before construction begins.
Contact SALA DECOR to discuss your home extension project in Phnom Penh and explore solutions that fit your goals, lifestyle, and budget.