# Working in Northern Ireland if you're GB-based
This guide is for GB-based trades thinking about taking work in Northern Ireland and wondering what actually changes once you get off the ferry. NI runs its own building rules, safety regulator, planning system and tribunals, so you need to treat it as a different jurisdiction for most things except tax.
Quick rule of thumb: if the job is in Northern Ireland, assume NI building regs, HSENI, NI planning and tribunals apply: CIS and tax stay UK-wide, but almost everything else runs on NI's own systems.
1. How NI is different
Northern Ireland has its own Building Regulations, its own health and safety enforcer (HSENI), a separate planning system, and its own industrial tribunals. UK tax and CIS still run UK-wide, but a GB firm working in NI is basically operating under a different legal setup for construction, safety and disputes.
Day-to-day differences:
- You deal with Technical Booklets instead of English Approved Documents.
- Site safety visits and RIDDOR-type reports go to HSENI, not HSE.
- Planning goes through the NI Planning Portal and the Planning Act (Northern Ireland) 2011, not English planning law.
- Employment disputes run via Industrial Tribunals (NI), not the English Employment Tribunal system.
Tip for new starters Treat NI jobs like working in another country, check your paperwork, insurance and travel plans before you say "yes".
2. Building Control, Technical Booklets vs Approved Documents
NI uses the Building Regulations (Northern Ireland) 2012, not the England/Wales Building Regs 2010. These set the legal requirements for structure, fire, drains, energy, etc., and are backed up by a suite of Technical Booklets A–V published by the Department of Finance.
Key points for you:
- Technical Booklets work a bit like Approved Documents · they're guidance, not law, but following them is the standard way to show compliance.
- Each booklet (for example, Technical Booklet N · Drainage, Technical Booklet F · Ventilation) sets out performance standards and accepted ways to meet them.
- The 2012 Regulations replaced the 2000 ones and apply to almost all building work from 31 October 2012 onwards.
Practical differences from England/Wales
- The lettered parts don't line up exactly with Approved Docs. You must look at NI's A–V mapping, not assume Part "N" in NI equals Part N in England.
- Some technical details and U-values differ, so a spec you've used in Liverpool might not tick the box in Lisburn.
- Building control is through district councils in NI. You need to submit applications to the correct council's building control section using NI forms and processes.
Example: drainage job for a GB plumber: In Manchester you'd design to English Part H and local water/sewer guidance. In Belfast you need to design and submit to Technical Booklet N (Drainage) and show compliance with the NI 2012 Regulations.
Tip for new starters Before pricing NI work, download the relevant Technical Booklets (A–V) from the NI building regs site and design to those, not to the English Approved Docs you're used to.
3. Health and safety, HSENI vs HSE
In NI, health and safety is enforced by HSENI (Health and Safety Executive for Northern Ireland), not by HSE. The core duties feel familiar because they come from similar legislation, but the actual law is the Health and Safety at Work (Northern Ireland) Order 1978 and related NI regulations.
What this means on site:
- RIDDOR-type reporting, site complaints and serious accidents are reported to HSENI, using its forms and numbers.
- HSENI inspectors have powers similar to HSE inspectors · they can visit, issue improvement and prohibition notices, and prosecute.
- CDM-style duties are set out in NI's own Construction (Design and Management) Regulations (Northern Ireland) · very similar to GB CDM 2015, but under NI law.
For you as a GB contractor, the standard (safe systems, RAMS, PPE) is broadly the same, but:
- You must reference NI regulations and HSENI guidance in your RAMS for NI jobs.
- Enforcement action will be under NI law, with HSENI leading.
Tip for new starters For any NI job, swap out "HSE" in your paperwork for "HSENI" and make sure your accident reporting and RIDDOR procedures follow HSENI guidance.
4. Planning, NI Planning Portal vs English system
Planning in NI runs under the Planning Act (Northern Ireland) 2011. The Department (and local councils) are responsible for planning policy and decisions, using the NI Planning Portal for applications and guidance.
Differences vs England:
- Different planning law and policy · English NPPF/PPG do not apply. NI has its own planning policy statements and local development plans under the 2011 Act.
- Different application forms, validation lists and processes · all accessed via the NI Planning Portal or individual council sites.
- Permitted development rights and thresholds are not identical to England, so works you assume are PD in GB may need full permission in NI.
Example: A loft dormer that's PD in Leeds might need a planning application in NI under the local plan and NI permitted development rules.
Tip for new starters Never assume English PD rules apply, always check an NI site through the NI Planning Portal or local council guidance before promising "no planning needed".
5. Employment tribunals, Industrial Tribunals NI
Employment disputes in NI go through Industrial Tribunals and the Fair Employment Tribunal, under the Industrial Tribunals (Northern Ireland) Order 1996 and associated rules. This is separate from the Employment Tribunal system in England, even though many of the rights (unfair dismissal, discrimination) look similar.
For a GB contractor with staff working in NI:
- If staff are based in or ordinarily work in NI, workplace disputes may land in the NI tribunal system, not the English one.
- Time limits, forms and some legal tests can differ, so your HR advice and templates need to allow for that.
- You don't need a separate "tribunal registration", but you do need to understand that the venue and rules are different if the work and employment relationship are centred in NI.
Tip for new starters If you start employing people who live and work in NI, use an employment solicitor who understands NI tribunals, not just GB law.
6. CIS, does it still apply in NI?
Yes, the Construction Industry Scheme (CIS) applies across the UK, including Northern Ireland. The Construction Industry Scheme (Income Tax) Regulations 2005 are UK-wide, so the rules on registering, verifying subbies, making deductions and filing monthly CIS returns are the same whether the site is in GB or NI.
- If you're a GB contractor paying subbies on jobs in NI, you operate CIS exactly as you would at home · verify, deduct 20/30%, file returns and give CIS statements.
- If you're a GB subbie working for a NI contractor, they will normally deduct CIS from your labour unless you have gross status.
- The main difference for you is logistics and admin · dealing with NI addresses and maybe more mixed currencies on expenses · but the CIS tax rules themselves don't change.
Tip for new starters Treat NI sites as CIS-able in exactly the same way as GB sites, keep up with registrations, verification and monthly returns as normal.
7. Insurance, does your policy cover NI?
Most UK trade insurances define their territorial limits as "Great Britain, Northern Ireland, the Channel Islands and the Isle of Man". So for many builders' and subbies' policies, NI is already included as standard, but you must check the wording.
| Policy type | Typical territorial wording | What it means for NI work |
|---|---|---|
| Public liability | "Great Britain, Northern Ireland, the Channel Islands, the Isle of Man" | You're covered for work in NI under the same limits as GB |
| Employers' liability | Usually same UK-wide territory | Staff working in NI are covered, but tell your insurer about NI work |
| Contractors all risks | Wording varies; often UK-wide but may exclude certain locations | Check sums insured and any NI-specific exclusions |
Things to do before going:
- Confirm your PLI, EL and CAR cover "Northern Ireland" with no weird exclusions.
- Tell your broker/insurer that you'll be working in NI · they may want details of duration, contract size and activities.
- Make sure your policy includes cover for travel and temporary accommodation risks if relevant.
Tip for new starters Don't assume NI is covered, send your schedule and territorial limits clause to your broker and get written confirmation before you book ferries.
8. Practicalities, travel, accommodation, registration
Some down-to-earth stuff that often gets forgotten:
- Travel and kit · for most GB firms you're going by ferry (Cairnryan, Liverpool, etc.). Factor in: sailing times, weather delays, and the cost of taking vans and plant over.
- Accommodation · budget for digs in NI; prices are similar to many GB regional towns, but they add up if you're there for weeks.
- Vehicles and driving · UK licences and insurance continue to work, speed limits posted in mph, but roads and enforcement are under NI law.
- CITB NI: NI has its own Construction Industry Training Board Northern Ireland (CITB NI), funded by a levy on construction employers with a wage bill over £80k. Even if you don't pay the levy, you can still access grants and training support as an employer working in NI.
- No special work visa or immigration issues if you're a GB citizen · it's all within the UK. The big extra costs are travel time and ferries/accommodation, plus a bit more admin around NI rules.
Tip for new starters Build ferry, fuel and digs into your day rates or lump sum price, don't try to absorb NI travel costs or you'll wipe out your margin.
What to do next
- Before accepting NI work, speak to your broker and confirm in writing that your PLI, EL and CAR policies cover Northern Ireland and the specific work you'll be doing.
- Download the NI Building Regulations 2012 overview and the relevant Technical Booklets (A–V) for your trade, and price/design from those, not from English Approved Docs.
- Set up an internal "NI jobs" checklist covering: HSENI contacts, NI Planning Portal, local building control, CIS (same rules, different addresses), and ferry/accommodation planning.
- If you're likely to work in NI regularly, talk to CITB NI about levy/grant status and training support for your crew on NI-specific regs and safety.
Sources
- Building Regulations (Northern Ireland) 2012 · legislation.gov.uk/nisr/2012/192/contents · main building regulations for NI.
- Technical Booklets A–V · Department of Finance NI · official guidance on meeting the 2012 Regulations.
- Health and Safety at Work (Northern Ireland) Order 1978 · legislation.gov.uk/nisi/1978/1039/contents · core workplace safety law enforced by HSENI.
- Construction (Design and Management) Regulations (Northern Ireland) · CDM-style duties for NI projects.
- Planning Act (Northern Ireland) 2011 · legislation.gov.uk/nia/2011/25/contents · NI's planning framework.
- Industrial Tribunals (Northern Ireland) Order 1996 · legislation.gov.uk/nisi/1996/1921/contents · employment dispute system in NI.
- Construction Industry Scheme (Income Tax) Regulations 2005 · legislation.gov.uk/uksi/2005/2045/contents · CIS applies UK-wide including NI.
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