7 from adjacent districts — postcode shown on each card.
Coleraine's housing stock ranges from Victorian terraces along the Causeway Coast to 1960s estates inland and newer developments around the university, each presenting distinct design challenges for extensions and alterations. Finding an architect registered with the Architects Registration Board who understands Northern Ireland's planning system — which differs from the rest of the UK — is essential for navigating local building control and conservation area requirements.
Coleraine's architectural market reflects its dual character as a university town and coastal gateway, with steady demand for student accommodation conversions, coastal property renovations, and family home extensions in established suburbs like Ballysally and Mountsandel. The town's Victorian core includes conservation areas where architects must navigate stricter planning scrutiny, whilst post-war estates typically allow more straightforward rear extensions. Local architects frequently deal with exposed coastal conditions requiring robust weatherproofing specifications, particularly for properties facing Atlantic weather systems. Planning applications go through Causeway Coast and Glens Borough Council, which has been working to reduce determination times but can still take 12-16 weeks for standard applications. The presence of University of Ulster has created a niche market for HMO conversions and purpose-built student blocks, whilst recent residential developments towards Portstewart Road show growing demand for contemporary design. Fee structures typically range £3,500-£6,000 for basic extension drawings through to £12,000-£25,000 for full new-build architectural services, with listed building work commanding premiums due to additional consultations required with Historic Environment Division.
Hiring an architect in Coleraine typically begins with an initial site visit and feasibility discussion, often offered free or for £150-£300, where they'll assess constraints like boundary setbacks, overlooking issues, and whether your property sits in a conservation area or Area of Outstanding Natural Beauty designation along the coast. For a typical single-storey rear extension, expect to pay £2,500-£4,500 for planning drawings and £1,500-£2,500 for subsequent Building Control approval drawings — many architects offer combined packages around £4,500-£6,500. Timeline from instruction to planning submission runs 4-8 weeks depending on survey requirements and design complexity, then add the council's 8-12 week determination period. ARB registration is legally required to use the title 'architect', and many Coleraine practices also carry RIBA Chartered Practice status. For coastal properties, expect architects to specify render systems and joinery suited to salt exposure. Listed building consent runs parallel to planning permission and can add 8-12 weeks to the process, requiring specialist heritage statements that not all generalist architects are equipped to provide. Most local architects will project-manage the full process including Building Control sign-off, though some charge separately for site inspections during construction.
Causeway Coast and Glens Borough Council applies Supplementary Planning Guidance that affects extension design, particularly around amenity space retention and overshadowing in tightly-packed Victorian streets. Properties within 5km of the coast often require specialist windload calculations and salt-resistant material specifications that add £400-£800 to structural engineer fees. If your property lies within Coleraine Town Centre Conservation Area or near scheduled monuments, you'll need enhanced design justification and potentially heritage impact assessments costing £800-£1,500. The Planning Act (Northern Ireland) 2011 means certain agricultural buildings and rural sites face stricter controls than equivalent sites in England, something not all architects outside NI fully grasp. Party wall agreements don't exist in Northern Ireland law the same way they do across the water — instead, disputes fall under common law, making architect-drafted boundary agreements sensible for terraced properties. New builds in rural BT postcodes may require approval under PPS21 countryside policy, which demands demonstrable rural need or replacement dwellings only.
Expect £2,500-£4,500 for planning drawings on a typical single-storey extension, plus £1,500-£2,500 for Building Control drawings. Many architects offer combined packages around £4,500-£6,500 total. Two-storey extensions or complex coastal sites with specialist weatherproofing requirements typically cost £6,000-£9,000 for full architectural services.
Not legally, but Causeway Coast and Glens planning officers expect professionally drawn proposals that meet Building Regulations and design guidance — DIY drawings rarely succeed. For listed buildings or conservation area properties, an architect's expertise navigating heritage requirements becomes practically essential. Permitted development rights are more limited in Northern Ireland than England, making professional advice valuable even for 'simple' extensions.
Causeway Coast and Glens Borough Council aims for 8-12 weeks for standard applications, though complex cases or conservation area properties can stretch to 16 weeks. Allow 4-6 weeks before submission for your architect to prepare drawings and supporting documents. Listed building consent runs concurrently but requires separate application, potentially adding further time if amendments are requested.
Northern Ireland operates under separate planning legislation (Planning Act NI 2011) with different permitted development rights and rural planning policies like PPS21. Building Regulations are also distinct, administered by local councils rather than a separate Building Control body. Architects practising here must understand these differences — mainland-trained architects occasionally misapply English rules, causing application delays.
Yes, most Coleraine architects provide Building Regulations drawings as standard or for £1,500-£2,500 additional fee, and many will submit applications and handle council inspector queries throughout construction. This is separate from planning permission and covers structural integrity, fire safety, insulation, and drainage. Some architects also offer site inspection services to certify work complies before Building Control sign-off.
Highly advisable. Listed building consent requires heritage impact assessments and detailed justification for any alterations, which generalist architects may lack experience preparing. Specialists understand Historic Environment Division expectations and can navigate requirements around original features, materials matching, and minimal intervention principles. Budget £800-£2,000 extra for heritage reports and expect longer consultation periods.
Typically £400-£900 for a desktop review of planning constraints, site potential, and rough costings, rising to £1,200-£2,000 if it includes measured surveys and sketch design options. Many architects offer free initial consultations covering basic feasibility, charging only when detailed drawings begin. For complex coastal sites or conservation area properties, budget towards the higher end for thorough constraint analysis.
Not mandatory, but periodic site inspections (typically 4-6 visits for an extension) ensure builders follow approved drawings and flag problems early. Some architects include this in their fee, others charge £150-£300 per visit. Given Building Control also inspects at key stages, architect visits provide additional quality oversight and can resolve design queries contractors raise mid-build.
Often yes, by 10-20%, because Atlantic exposure demands specialist material specifications, windload calculations, and coordination with structural engineers on weatherproofing details. Properties within direct salt-spray zones require enhanced detailing for render systems, joinery, and flashings. The additional technical work and engineer consultations typically add £600-£1,500 to standard extension fees.
Yes, many homeowners commission planning drawings only (£2,500-£4,500) then either hire a different professional for Building Regulations or ask their builder to arrange it. However, splitting services can create coordination issues if the construction details differ from planning approval. Most architects offer better value on combined packages and ensure consistency between planning and building stages.
About the author
Senior Editor, Building & Renovation · 15years' experience · RIBA Part 1 & Part 2 qualified
RIBA-trained, now writes about UK extensions, loft conversions and planning. 15 years covering UK building regulations.