Garden Room Cost Per m² in Ireland: Complete Price Guide

10.10.2025

Modern garden room 4x4m, pent roof, 44mm wall thickness

Looking for clear pricing information on garden rooms and offices in Ireland? This comprehensive guide breaks down exactly what you can expect to pay, what’s included in standard packages, and what optional extras might impact your final cost. We’ve gathered current Irish market prices to help you budget effectively and choose the right garden room for your needs.

Garden room cost per square metre in Ireland

Garden room pricing in Ireland varies based on several factors, with the price per square metre ranging significantly depending on the specification level you choose:

  • Basic log cabin structures: €350-€650 per m² depending on specifications
  • Mid-range garden rooms: €1,000-€1,500 per m²
  • Premium fully-fitted garden offices: €1,700+ per m² before VAT

This price variation reflects differences in wall thickness, insulation quality, window/door specifications, and interior finishing. For comparison, traditional house extensions can cost up to €3,400 per m² before VAT, making garden rooms a more cost-effective option for adding space.

Typical total costs by garden room size

To give you a clearer idea of what you might pay for a complete garden room, here’s a breakdown by common sizes:

Small garden rooms (up to 15m²)

Small garden rooms are perfect for home offices, hobby spaces, or compact guest accommodation:

  • 10m² garden room: €5,000-€12,660
  • Example: Garden house “Paradise A” (10m²): €12,660
  • Example: Garden house “Paradise B” (10m²): €11,010
  • 12m² garden room: €5,350-€16,720
  • Example: Garden home office “Jacob D” (12m²): €5,830
  • Example: Garden house “Eva D” (12m²): €5,630
  • 15m² garden room: €7,410-€17,820
  • Example: Garden house “Super Lucas E” (15m²): €8,160
  • Example: Garden house “Mia 1” with shower/toilet (15m²): €7,410

These smaller models fall within the planning permission exemption limits for many Irish properties, making them a straightforward option for adding space without bureaucratic hurdles. Learn more about planning a garden room before making your decision.

Medium garden rooms (16-25m²)

Medium-sized garden rooms offer more flexibility for multiple uses or larger workspaces:

  • 16-18m² garden room: €7,560-€19,910
  • Example: Garden house “Linda” (16m²): €7,560
  • Example: Garden house “Mark” (16m²): €9,700
  • Example: 2-room garden annexe “Hansa Holiday” (18m²): €14,980
  • 20-25m² garden room: €15,000-€42,500
  • Premium 25m² garden office (fully fitted): approximately €42,500 before VAT

These medium-sized structures often require planning permission but provide substantial space for year-round use as offices, studios, or entertainment spaces.

Large garden rooms (30m²+)

Larger garden rooms can function as granny flats, multi-room offices, or substantial living spaces:

  • 30-40m² garden room: €17,040-€28,980
  • Example: One bedroom granny flat “Holiday M” (30m²): €17,040
  • Example: Large wooden granny flat “Hansa 2” (40m²): €28,980
  • 40m²+ garden room: €27,650-€30,770+
  • Example: 2-bedroom log cabin “Granny Flat B” (42m²): €27,650
  • Example: 3-bedroom log cabin “Granny Flat D” (50m²): €30,770

These larger structures typically require planning permission but offer residential-quality spaces that can significantly enhance your property value. For multi-purpose use, consider models like our modern summer house with side shed that combines living space with storage.

What’s included in standard garden room packages

Understanding what’s included in the base price helps you compare options more accurately. Most standard garden room packages in Ireland include:

Structure and exterior

  • Timber walls (typically 44mm, 58mm, or 70mm thickness)
  • Roof structure and covering (usually EPDM rubber or shingles)
  • Doors and windows (standard double-glazed units)
  • External cladding (usually treated timber)
  • Foundations preparation advice (though actual foundation work may be extra)

Interior features

  • Basic insulation in walls, floor and ceiling
  • Internal wall finishes (varied by manufacturer)
  • Flooring (usually laminate or timber)
  • Basic electrical package (lights and sockets in premium models)

Services

  • Delivery (usually free from major Irish suppliers)
  • Assembly instructions (for DIY installation)
  • Warranty (typically 2-5 years, varies by manufacturer)

For example, our garden office pods come with all structural components needed for assembly, requiring only foundation preparation and any electrical connections to be arranged separately.

Common upgrades and their cost impact

To customise your garden room for specific uses, consider these popular upgrades:

Structural enhancements

  • Increased wall thickness (70mm vs 44mm): €500-€1,500 extra
  • Higher-grade insulation: €20-€50 per m² extra
  • Porch or veranda addition: €1,000-€3,000 depending on size
  • Premium cladding options (cedar, composite): €30-€80 per m² extra

Interior upgrades

Garden room with shower and toilet 5x3m, pent roof, 44mm wall thickness
  • Bathroom facilities: €2,000-€5,000 extra (consider our garden room with shower and toilet)
  • Kitchen facilities: €3,000-€8,000 depending on specification
  • Enhanced electrical package: €500-€2,000 extra
  • Premium flooring: €30-€100 per m² extra
  • Heating solutions: €300-€1,500 depending on system choice

External additions

  • Upgraded doors (bifold, sliding): €1,000-€3,000 extra
  • Aluminium door options: €800-€2,500 extra (check our aluminium sliding door models)
  • Decking area: €80-€150 per m² extra
  • Landscaping integration: varies widely by project

When budgeting for these upgrades, remember that each addition affects the total cost differently. For specialised uses like a garden golf simulator room, factor in both the room itself and any special interior requirements.

Foundation costs and options

The foundation is a crucial component not always included in base prices but essential for a durable garden room:

  • Concrete base: €90-€150 per m²
  • Concrete pile foundations: €1,000-€2,500 total
  • Ground screw system: €1,200-€3,000 total
  • Timber frame base: €70-€120 per m²

Your site conditions will determine the most suitable foundation type. Learn more about garden house foundation types to make an informed decision.

Installation and timeline considerations

Factor these timeline elements into your planning:

  • DIY installation: 2-7 days depending on size and complexity
  • Professional installation: 1-5 days typically
  • Lead time for custom orders: 8-10 weeks on average
  • Delivery timeframes: Within a week during quieter months, longer during peak periods
  • Site preparation: 1-3 days before installation begins

Some suppliers offer fast delivery options for standard models, which can significantly reduce your waiting time.

Cost-saving tips for garden room buyers

To get the best value for your garden room investment:

  1. Buy during sales periods – check our sale for significant savings
  2. Consider DIY assembly to save on installation costs
  3. Choose a standard model rather than bespoke designs where possible
  4. Plan electrical and plumbing requirements early to avoid costly adjustments
  5. Compare total costs including foundations and finishing, not just the base price
  6. Look for models with included features rather than adding upgrades later

Making the right investment

garden room b4

When deciding on your garden room budget, consider:

  • Usage frequency: Daily use justifies higher investment in insulation and comfort
  • Long-term plans: If you might sell your property, a higher-spec garden room can add significant value
  • Multi-functionality: Spaces that serve multiple purposes (office/guest room/gym) offer better value
  • Energy efficiency: Better insulation costs more upfront but saves on heating costs

For comprehensive information on all cost factors, read our detailed guide to garden room costs in Ireland.

By understanding these pricing factors, you can make a more informed decision about the garden room that best fits your needs and budget. Whether you’re looking for a compact garden office pod or a spacious multi-room annexe, knowing what drives costs helps you plan your investment effectively.

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