Two-storey extension plans and drawings in Renfrewshire and Inverclyde

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 set of extension plans involves

Two-storey extension plans involve a measured survey of your house, design options, and a set of scaled drawings showing the existing and proposed floor plans, elevations, a site plan and a location plan. Building warrant drawings with construction details follow as a separate, more technical set.

The main places we list in Renfrewshire and Inverclyde are Paisley (PA1), Greenock (PA15), Renfrew (PA4), Johnstone (PA5), Erskine (PA7) and Port Glasgow (PA14). We cover the villages in between too.

Fees

Planning drawings (survey and design) are a guide of £2,000–£3,500 and building warrant drawings and specification £1,500–£4,000, with your design stage priced in writing before it starts.

Rules in Scotland

In Scotland, the plans support a householder application, costing £371, and later a building warrant application with technical drawings to the Scottish Building Standards Technical Handbooks. Because Class 1B needs 10 m to every boundary, the site plan showing boundary distances is often what decides the route.

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

Drawings that can be built

Drawings that ignore steel sizes, floor depths or drain runs often need redesigning once a builder prices them. We coordinate the design with the structural engineer and our build teams, so what is approved is practical to construct.

Compare options early

Sketching two or three layouts, such as rear, side or part two-storey, is the cheapest point to make big decisions. Each option comes with a guide cost and a view on the approval route, so you choose with the full picture rather than discovering limits later.

How we work in Renfrewshire and Inverclyde

Visit and first ideas
One of our team visits your house in Renfrewshire and Inverclyde, checks the walls, roof and drains, and sketches out options with you.
Get it approved
Once you're happy with the design we submit it to the council for Renfrewshire and Inverclyde and deal with any questions from the planning officer.
Fixed price in writing
With approved drawings and calculations, we give you a fixed build price and a programme you can plan around.
Build and sign-off
Vetted teams working under S&K build the extension, and we arrange the completion certificate at the end.

Towns we cover in Renfrewshire and Inverclyde

Two-storey extension plans and drawings in Renfrewshire and Inverclyde: questions

How long do extension plans take to prepare?

Survey, design and planning drawings usually take 4 to 8 weeks, depending on how many options you want to explore. Technical design, structural calculations and a building warrant take a further 4 to 8 weeks, and this can overlap with the planning decision period.

Do the plans include structural calculations?

Not at planning stage. Structural calculations and beam design are prepared by a structural engineer once the design is agreed, and they form part of the building standards package. We coordinate the engineer's work with the drawings so steel sizes and floor depths match.

Do I own the plans once they are drawn?

You receive copies of the drawings to use for your project, including your planning application and a building warrant. Copyright in drawings normally stays with whoever prepares them unless agreed otherwise. Your written design stage price sets out how the drawings can be used.

Neighbouring areas

All extension services in Renfrewshire and Inverclyde · About two-storey extension plans and drawings