What is the cheapest way to set up a home server in the UK?

The cheapest option is a Raspberry Pi 5, which costs around £60–80 for the board. Add a case, power supply and a microSD card or NVMe SSD and you can have a fully functional home server for under £150. It draws very little power — roughly £15 a year in electricity at UK rates — making it the most economical long-term choice for lightweight tasks like running Home Assistant or Pi-hole.

How much does it cost to run a home server in the UK?

Running costs depend entirely on the hardware. A Raspberry Pi 5 averages around £15 per year in electricity. A mini PC such as an Intel NUC costs around £44 per year. A Synology NAS with two drives runs to roughly £89 per year. These figures assume the UK energy price of around 34p per kWh and the server running 24/7.

Do I need a home server for Home Assistant?

You don't strictly need a dedicated server — Home Assistant can run on any PC or even as a virtual machine. However, a dedicated low-power device like a Raspberry Pi 5 running Home Assistant OS is strongly recommended so your automations keep working around the clock, even when your main PC is off. See our Home Assistant UK setup guide for the full walkthrough.

Is UnRAID worth it for a home server in the UK?

UnRAID costs around £49 as a one-time licence and is widely regarded as the most beginner-friendly home server OS for people who want to mix and match hard drive sizes without rebuilding an array. If you're comfortable with free alternatives like TrueNAS SCALE or Proxmox, you can achieve similar results at no cost — but UnRAID's polished UI and active community are worth the fee for many users.

Home Server Setup UK: A Beginner's Guide to Hardware, OS & Uses

A home server setup is one of the most rewarding projects a UK tech enthusiast can take on. Whether you want to stream films from your own hard drives, run Home Assistant to automate your house, or block adverts across every device on your network, a home server puts you in full control — no subscription fees, no data sent to third-party clouds, and no monthly bills beyond electricity.

This guide walks you through the key decisions: what hardware to buy, which operating system to install, what you can run on it, and how to keep running costs sensible at UK electricity prices.

Why Set Up a Home Server?

People in the UK set up home servers for many different reasons, but the most popular uses are:

Media streaming — serve films, TV shows and music to every TV and phone in the house using Plex or Jellyfin, without paying a streaming subscription.
Home automation hub — run Home Assistant locally so your smart-home devices work even when the internet is down.
Network-wide ad blocking — Pi-hole filters adverts at the DNS level before they reach any device on your network.
Private VPN — WireGuard lets you connect securely back to your home network when you're away.
File backups and NAS — a Network Attached Storage (NAS) solution keeps your photos, documents and work files safe with redundant drives.
Self-hosted cloud — Nextcloud replaces Google Drive or Dropbox, keeping your files entirely on your own hardware.

You don't need all of these at once. Most people start with one or two services and expand as they get more comfortable.

Choosing Your Hardware

The hardware you choose will depend on your budget, the services you want to run, and how much you care about power consumption. Here are the most popular options for UK home labs.

Raspberry Pi 5 — Best Budget Entry Point (£60–80 for the board)

The Raspberry Pi 5 is an excellent starting point. At around £60–80 for the board alone (plus a case, power supply and storage), it is the cheapest way to get a always-on Linux server running. It draws as little as 3–5 W under light load, which matters when UK electricity costs around 34p per kWh. At that rate, a Raspberry Pi 5 left on continuously costs roughly £4–6 per year in electricity.

It is well suited to running Pi-hole, Home Assistant (as a Docker container or via Home Assistant OS), a lightweight VPN, or a small Nextcloud instance. It will struggle with transcoding 4K video in Plex, and it is not ideal for running many services simultaneously.

You will need a microSD card or, better, an NVMe SSD via the PCIe connector — the Pi 5 is the first Raspberry Pi with a native PCIe slot, making SSD storage practical for the first time.

Intel NUC or Mini PC — Best Mid-Range Option (£300–500)

An Intel NUC or similar mini PC (such as models from Beelink, ASUS or Minisforum) gives you a full x86 processor in a compact, quiet box. These machines typically draw 10–25 W idle and can transcode 4K video, run multiple Docker containers, and handle demanding workloads that would overwhelm a Raspberry Pi.

Budget £300–500 for a mid-range NUC with 16 GB RAM and a 500 GB NVMe SSD, though refurbished business-grade mini PCs from the likes of HP or Dell can be found for less on eBay. At 15 W average draw and 34p/kWh, annual electricity costs work out to roughly £44 — still very manageable.

An Intel NUC running Proxmox (a free hypervisor) can host Home Assistant as a virtual machine alongside other services, giving you complete flexibility without needing to choose one OS for everything.

Synology DS923+ NAS — Best for Beginners Wanting a Turnkey Solution (£499+ for the chassis)

A dedicated NAS device like the Synology DS923+ is purpose-built for file storage and media serving. It runs Synology's DiskStation Manager (DSM), a polished web interface that makes it easy to set up RAID, shared folders, a media server and automatic backups with minimal technical knowledge.

The DS923+ chassis costs around £499 and takes four 3.5-inch SATA hard drives — you'll need to buy these separately. A typical build with two 4 TB drives in RAID 1 (mirrored for redundancy) might cost £700–900 all in. It is the most expensive option but the easiest to maintain long-term, with Synology's software receiving regular updates and security patches.

For a deeper look at NAS options, see our guide to the best NAS drives for home use in the UK.

Choosing an Operating System

Once you have your hardware, you need an OS. The main contenders are:

Home Assistant OS

Home Assistant OS is the simplest way to run a dedicated Home Assistant server. It is a stripped-down Linux distribution that runs Home Assistant and nothing else (except add-ons). Install it on a Raspberry Pi or a dedicated mini PC and you have the most reliable, easiest-to-update Home Assistant setup possible. It is free and open source.

Proxmox VE

Proxmox VE is a free, open-source hypervisor based on Debian Linux. It lets you run multiple virtual machines and containers on a single piece of hardware. A typical setup might run Home Assistant as a VM, Pi-hole as a lightweight LXC container, and a Plex Media Server in another container — all isolated from each other, all managed from a clean web interface. Proxmox is free but has a commercial support tier; the community edition works fine for home use.

TrueNAS SCALE

TrueNAS SCALE is a free, open-source NAS operating system based on Linux and the ZFS file system. ZFS is widely regarded as one of the safest file systems available — it detects and corrects data corruption automatically and supports flexible storage pools. TrueNAS SCALE also runs Docker containers and Kubernetes apps through its built-in Apps catalogue, so it can serve double duty as a NAS and an application server. It works best on x86 hardware with at least 8 GB of RAM, as ZFS benefits from generous memory.

UnRAID

UnRAID is a popular paid OS (around £49 as a one-time licence) that is beloved in the home-lab community for its flexibility. Unlike RAID arrays that require matched drives, UnRAID lets you mix drives of different sizes and add new ones without rebuilding the array. It supports Docker containers and VMs through a polished UI and has a large, active community. If you're not comfortable with command-line Linux, UnRAID's GUI is among the most approachable available.

Power Costs in the UK — What to Expect

UK electricity is among the most expensive in Europe. As of mid-2025, the Ofgem price cap sits at around 24–34p per kWh depending on the quarter, so energy efficiency should factor into every hardware decision you make.

Use this rough guide to estimate annual running costs:

Raspberry Pi 5 (5 W average): ~£15/year
Intel NUC / mini PC (15 W average): ~£44/year
Synology DS923+ with 2 drives (30 W average): ~£89/year
Old tower PC repurposed as a server (150 W average): ~£445/year

These figures assume 34p/kWh running 24/7. An old desktop PC repurposed as a server may seem free, but the electricity cost can dwarf the price of purpose-built hardware over two or three years. Hibernate-on-idle or Wake-on-LAN features can help, but dedicated low-power hardware is almost always the better long-term choice in the UK.

Common Use Cases in Detail

Plex or Jellyfin Media Server

Plex and Jellyfin both turn your server into a Netflix-style streaming platform for your own video and music library. Plex has a polished UI and broad device support but requires a Plex Pass subscription (around £4.99/month or £119.99 lifetime) for some features like offline sync and hardware transcoding. Jellyfin is completely free and open source with no subscription.

For 4K HDR video with transcoding, you need at least an Intel NUC with Quick Sync hardware acceleration or a GPU. Direct play (where the client plays the file natively without transcoding) works fine even on a Raspberry Pi 5.

Home Assistant

Running Home Assistant locally on your own server means your automations fire even during an internet outage, your data stays on your own hardware, and you're not dependent on manufacturer cloud servers that may be switched off. Home Assistant integrates with thousands of devices and supports local-only protocols including Zigbee, Z-Wave, Thread and Matter. For the full networking setup, see our Home Assistant network setup guide.

Pi-hole DNS Ad Blocker

Pi-hole is a DNS sinkhole that blocks adverts and trackers at the network level, before they reach any device. You point your router's DNS settings at the server's IP address and Pi-hole handles the rest. It runs comfortably on a Raspberry Pi and even on a container alongside other services. It is free and open source.

WireGuard VPN

WireGuard is a modern, lightweight VPN that lets you connect securely back to your home network from anywhere. Use it to access your NAS files on the go, reach your Home Assistant dashboard remotely without exposing it to the internet, or route traffic through your home IP when abroad. WireGuard is built into the Linux kernel and is simpler to configure than older protocols like OpenVPN.

Getting Started: Step-by-Step Summary

Pick your hardware — Raspberry Pi 5 for budget/HA only; mini PC for general purpose; Synology NAS for storage-first.
Choose an OS — Home Assistant OS if HA is your sole goal; Proxmox for maximum flexibility; TrueNAS SCALE for NAS + apps; UnRAID if you prefer a polished paid UI.
Install and update — always run the latest stable release and enable automatic security updates.
Set a static IP — assign a static or DHCP-reserved IP on your router so the server's address never changes.
Set up remote access carefully — use a VPN (WireGuard) rather than exposing services directly to the internet. Never forward port 80/443 to an unprotected service.
Plan your backups — a home server is not a backup in itself. Follow the 3-2-1 rule: three copies of data, on two different media types, with one offsite (a cloud backup service or a drive at a relative's house).

A home server doesn't need to be complicated or expensive to get started. A Raspberry Pi 5 and a free OS is enough to run Pi-hole and Home Assistant this weekend. From there, you can expand at your own pace.