One of the first decisions you'll face when planning a home extension in Dublin is what type of roof to put on it. Flat roofs and pitched roofs each have their place — and the right choice depends on your budget, your planning situation, and how the extension will be used.
Flat Roofs
Modern flat roofs are a far cry from the leaky felted roofs of the 1970s. Today's GRP fibreglass or EPDM rubber systems can last 25 years or more with minimal maintenance.
Advantages: Lower cost, simpler construction, faster to build, can double as a usable roof terrace if properly specified.
Disadvantages: Require good drainage design to avoid ponding water. Some planning authorities in Dublin prefer pitched roofs for extensions visible from the street.
Pitched Roofs
A pitched roof on an extension typically means matching the angle and materials of your existing roof, creating a more seamless look from the outside.
Advantages: Better long-term weather performance, more visually consistent with the main house, often preferred by Dublin City Council planners.
Disadvantages: Higher cost and longer build time. Reduces usable headroom inside the extension if the pitch is steep.
Our Recommendation
For rear extensions where planning is more straightforward, a flat roof with a quality membrane system is often the most cost-effective choice. For side extensions or any work visible from the front of the property, a pitched roof matching the existing house is usually the safer planning bet.
Not sure what's right for your project? Call Dublin Roofing Pros on 01 234 5678 for a free consultation.