On-Site Electricity for a Self-Build in Ireland — Temporary Connection, Generator, or Solar
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Temporary ESB connection: €1,500–€3,000. Generator: €100–€200/week. Solar + battery: €3,000–€5,000 but no fuel cost.
Three options for on-site electricity on a self-build: temporary ESB connection (€1,500–€3,000 to install, plus a daily standing charge of €1–€2/day), generator (€100–€200/week plus diesel, typically €50–€100/week in fuel), or solar + battery (€3,000–€5,000 installed, no fuel cost). The temporary ESB connection is the cleanest option for any build over 6 months. Apply to ESB Networks at least 8 weeks before you need it. A generator is cheapest for very short builds (under 6 weeks) or remote sites where ESB won't connect. Solar + battery pays back if the build runs 9+ months and you can reuse the kit on the finished house (for off-grid or backup). Most Irish self-builders use ESB temporary connection for the build, then convert to the permanent domestic connection on completion.
When this matters most
You're at the pre-construction phase and need to plan site power.
When this doesn't apply
Your build is finished and connected to the grid.
Sources
ESB Networks, New connections and temporary supply. https://www.esbnetworks.ie/
Frequently asked questions
How much does a temporary ESB connection cost?
€1,500–€3,000 to install, plus a daily standing charge. Apply to ESB Networks at least 8 weeks before you need it. Most self-builds use this for the build duration.
Can I use a generator for a self-build?
Yes, for short builds (under 6 weeks) or remote sites where ESB won't connect. €100–€200/week hire plus €50–€100/week in diesel. Not viable for a 9–15 month build.
How long does an ESB permanent connection take?
8–16 weeks from application to commissioning. Apply as soon as you have planning permission. Most new homes need an ESB Networks design approval before trenching starts.
When this matters most
You're at the pre-construction phase and need to plan site power.
When this doesn't apply
Your build is finished and connected to the grid.
Where to go next
Next decision
The next step in your build sequence.
- Foul Drainage Connection in Ireland — Mains Sewer, Treatment System, or Septic →
- Is My Site Buildable in Ireland? The Five Checks That Decide It →
- Land Registry Check in Ireland — Folio, Map, and What to Look For Before You Buy →
- Ribbon Development in Ireland — The Planning Policy That Refuses Houses Along Rural Roads →
- Site Access in Ireland — Road Entrances, Sightlines, and the Road Opening Licence →
- Site Office and Welfare for a Self-Build — What You Need by Law (SHWW 2013) →
- Site Security on a Self-Build in Ireland — Hedges, Hoardings, CCTV, and Insurance →
- Site Survey in Ireland — Topographical, Measured, and Boundary Surveys →
Branch into
Adjacent decisions at the same stage.
- Flood Risk Maps in Ireland — How to Check opw.ie Before You Buy a Site →
- Percolation Tests in Ireland — EPA T-values, What They Mean, and What Costs When You Fail →
- Rural Housing Policy in Ireland 2026 — Local-Needs Tests and How Counties Vary →
- Septic Tank vs Mains Sewer in Ireland — When Each Applies and What It Costs →
- Well Yield Tests in Ireland — How to Confirm a Rural Water Supply Before You Buy →
Watch out for
Common mistakes, hidden costs, gotchas.
- Percolation Tests in Ireland — EPA T-values, What They Mean, and What Costs When You Fail →
- Septic Tank vs Mains Sewer in Ireland — When Each Applies and What It Costs →
- Site Assessment Cost in Ireland — Soil Test, Percolation Test, Water Test, and What to Order Together →
- Site Purchase Costs in Ireland — Stamp Duty, Legal Fees, and What Adds Up →
- Irish Soil Classification — Class 1 to Class 5+ and What Each One Costs You in Foundation →
Compare with
Alternative approaches worth knowing.