Open space living room and kitchen interior with large windows, gray sofa, dining table and hardwood flooring. Modern design solution, 3d rendering

Extensions & Renovations

Feb 11, 2026

9 min read

J&G Conwell Construction

Expanding Your Horizons: The Benefits of House Extensions in Ireland

House extensions provide homeowners in Ireland with innovative ways to create extra space. This article explores the benefits and options available for those considering house extensions in Ireland, such as a 40 square meter extension or modular extensions.

Advantages of House Extensions

Increased Living Space

Create more rooms for family – Whether it's a new bedroom, playroom, or living area, extensions give your family the space they need to grow
Add a home office for work – With remote work becoming increasingly common, a dedicated workspace is more valuable than ever
Utilize a 40 square metre extension – This popular size provides substantial additional space without overwhelming your property

Enhanced Property Value

Improve overall market appeal – A well-designed extension can make your home stand out in the competitive Irish property market
Increase resale potential – Extensions typically add more value than they cost, making them a smart investment
Attract buyers looking for space – Families actively seek homes with additional rooms and living areas

Expert Insight

A 40 square metre extension can typically add 15-20% to your home's value in Ireland, often recouping the entire investment cost when you sell.

Types of Extensions

Choose the extension type that best suits your needs, budget, and timeline

Modern open-plan living room with dark leather sofa, kitchen, and patio view through sliding glass doors

Traditional Extensions

Traditional extensions offer maximum flexibility in design and are built on-site using conventional construction methods. They seamlessly integrate with your existing home's architecture.

Design Flexibility

Expand existing structures with complete design freedom to match your vision

Planning Permissions

Commonly involve planning permissions and building regulations compliance

Large-Scale Projects

Often used for substantial additions like multi-room extensions or two-storey builds

Typical Timeline: 4-8 months

Modular house being built inside a factory, showing the wooden frame and the almost complete module

Modular Extensions

Modular extensions are prefabricated off-site and quickly installed at your property. They offer modern, cost-effective solutions with minimal disruption to your daily life.

Quick Installation

Rapid to install with most construction happening off-site in controlled conditions

Cost-Effective

Generally more affordable than traditional builds with predictable pricing

Innovative Design

Explore modern modular extensions Ireland cost and contemporary design options

Typical Timeline: 6-12 weeks

Choosing the Right Extension Type

The choice between traditional and modular extensions depends on your budget, timeline, and specific requirements. Traditional extensions offer unlimited customization, while modular options provide speed and value. Contact J&G Conwell Construction to discuss which option best suits your project.

Planning and Regulations

Navigating the legal requirements for your house extension in Ireland

Understanding Local Guidelines

Check Local Building Regulations

Each local authority in Ireland has specific building regulations. Research your area's requirements before starting your project to avoid delays or complications.

Ensure Compliance with Planning Permissions

Some extensions fall under exempted development, while others require full planning permission. Understanding which applies to your project is crucial.

Familiarize with House Extensions Ireland Requirements

Irish building standards include specific requirements for structural integrity, fire safety, ventilation, and energy efficiency that must be met.

Design Considerations

Select Styles That Match Your Home

Your extension should complement your existing property's architecture, materials, and aesthetic to maintain visual harmony and maximize property value.

Optimize Natural Light in Extensions

Strategic placement of windows, skylights, and glass doors can flood your new space with natural light, creating a bright and welcoming environment.

Consider a 40 Square Metres Extension Layout

A 40 sq m extension is the ideal size for most projects – large enough to make a significant impact while remaining cost-effective and manageable.

Exempted Development

Extensions up to 40m² may not require planning permission if they meet specific criteria

Building Control

All extensions require compliance with Building Regulations and BCAR (Building Control Amendment Regulations)

Timeline

Planning permission applications typically take 8-12 weeks for approval if required

Case Studies: Real Extensions, Real Results

See how house extensions have transformed homes across Ireland

Traditional Extension

Case Study #1

Successful Home Extensions: The Dublin Family Project

A growing family in Dublin 15 needed additional living space but wanted to avoid the hassle and expense of moving. They opted for a 45 square metre ground floor extension that added a spacious open-plan kitchen-dining area and a home office.

€85,000

Investment

+22%

Value Increase

5 months

Completion Time

Property value increased from €385,000 to €470,000

Family satisfaction rating: 10/10 – avoided moving costs and stress

Modern, energy-efficient design reduced heating costs by 15%

Case Study #2

Modular Extensions in Action: The Cork Renovation

A couple in Cork wanted to add a garden room and home gym but needed a solution that minimized disruption to their daily lives. They chose a modular extension that was manufactured off-site and installed in just 3 days.

€52,000

Total Cost

8 weeks

Start to Finish

30%

Cost Savings

30% cost savings compared to traditional construction methods

Minimal disruption – family continued normal routines throughout

High-quality finish with modern insulation and energy efficiency

Modular Extension

What Homeowners Are Saying

"Our house extension not only gave us the space we desperately needed but also increased our property value beyond our expectations. The process was smooth, professional, and the results exceeded what we imagined. We couldn't be happier with our decision to extend rather than move."

— Recent J&G Conwell Construction Client

Conclusion

House extensions provide numerous advantages to homeowners in Ireland, including improved living spaces and increased property value. Whether considering a traditional or modular extension, understanding the scope and regulations is vital for a successful project.

From creating the perfect 40 square metre extension to exploring cost-effective modular extensions Ireland cost options, the possibilities are endless. With proper planning, professional guidance, and quality construction, your house extension can transform your home and enhance your lifestyle for years to come.

Key Takeaways

Extensions add valuable living space without the stress and expense of moving
Choose between traditional flexibility or modular speed and value
Proper planning and compliance with regulations ensures a smooth process
Well-executed extensions typically add 15-20% to property value

Ready to expand your horizons with house extensions in Ireland?

Start Your Extension Project Today

Contact J&G Conwell Construction for a free consultation