On-Site Electricity for a Self-Build in Ireland — Temporary Connection, Generator, or Solar
On this page
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.
TL;DR
Temporary ESB connection: €1,500–€3,000 to install, plus a daily standing charge. Cleanest option for any build over 6 months.
Generator: €100–€200/week plus diesel. Cheapest for very short builds (under 6 weeks) or remote sites where ESB won't connect.
Solar + battery: €3,000–€5,000 but no fuel cost. Pays back if the build runs 9+ months and you can reuse the kit on the finished house.
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.
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.
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.