Building regulations for two-storey extensions in Renfrewshire and Inverclyde
Planning an extension in Renfrewshire and Inverclyde? This is how our building standards service works, with the Scotland rules and typical fees.
Renfrewshire and Inverclyde at a glance
- Nation
- Scotland
- Price region
- Scotland
- Postcode areas
- PA
- Towns covered
- 10 listed below, plus surrounding villages
- Site visits
- Free, no obligation
What a building warrant application involves
A building warrant for a two-storey extension involves preparing technical drawings and a specification that show how the extension meets the rules on structure, fire safety, insulation, ventilation, electrics and drainage, getting them approved and having the work inspected. At the end you receive a completion certificate.
Across Renfrewshire and Inverclyde we cover Paisley (PA1), Greenock (PA15), Renfrew (PA4), Johnstone (PA5), Erskine (PA7) and Port Glasgow (PA14), plus the smaller places around them.
Fees
Technical drawings and specification are a guide of £1,500–£4,000. The council's building warrant fee depends on the value of the work; we confirm every fee in writing before the design stage starts.
Rules in Scotland
In Scotland, you need a building warrant from the council's building standards service before work starts, assessed against the Scottish Building Standards Technical Handbooks rather than Approved Documents. At the end you submit a completion certificate, which the council accepts after its checks. No work should start until the warrant is granted.
Approval in Scotland: Householder planning application: £371. Councils have two months to decide a local planning application.
Building standards: A building warrant from the council's building standards service before work starts, and a completion certificate at the end. Scotland uses its own Technical Handbooks.
There is no Party Wall Act in Scotland. Shared walls and boundaries are governed by title deeds and common law, so we speak to neighbours early and record the condition of shared structures.
Getting the design right
Full plans and inspections
Full plans approval checks the design before work starts, which we recommend for two-storey extensions. Building standards then inspects key stages, such as foundations, damp-proofing, drainage and insulation, before issuing the completion certificate.
How we work in Renfrewshire and Inverclyde
Free site visit
We visit your home in Renfrewshire and Inverclyde, look at the structure, access and boundaries, and talk through what you want the new rooms to do.
Plans, then approval
Measured survey, design, then the right approval route for your house. We explain each step before we take it.
Technical design
We prepare the building warrant drawings, structural calculations and specification so the build price can be fixed.
Finish and certify
Second fix, plastering and making good, then the council's final building standards inspection and the completion paperwork.
Towns we cover in Renfrewshire and Inverclyde
Building regulations for two-storey extensions in Renfrewshire and Inverclyde: questions
What is a build-over agreement?
A build-over agreement is permission from your water company to build over or near a public sewer. Many rear extensions sit near shared drains, and the water company will want access protected and the pipe checked. We check sewer records early so the agreement does not delay the start.
What is a completion certificate and why do I need one?
A completion certificate is the document from building standards confirming that the work met the regulations. A buyer's solicitor will ask for it when you sell, and missing certificates can delay a sale. In Scotland, the council accepts your completion certificate after its own checks.
Is a building notice or full plans better for a two-storey extension?
Full plans is better for most two-storey extensions. The design is checked and approved before work starts, so problems with structure or fire escape are found on paper rather than on site. A building notice relies on inspections during the build and suits only simple work. Scotland always needs a building warrant.
Neighbouring areas
- Building regulations for two-storey extensions in Glasgow and Dunbartonshire
- Building regulations for two-storey extensions in Ayrshire
- Building regulations for two-storey extensions in Lanarkshire
- Building regulations for two-storey extensions in Falkirk, Stirling and Clackmannanshire
All extension services in Renfrewshire and Inverclyde · About building regulations for two-storey extensions
Ready to see what a second storey could do for your home?
Book a free site visit. We'll look at your house, talk through options and explain the approvals you'd need, then price the design stage in writing.