Airdrie ยท House Extension

House Extension
in Airdrie

Compare quotes from vetted Airdrie extension builders for single-storey, double-storey and rear extensions. Transparent pricing from ยฃ15,000. Free, no-obligation quotes โ€” results in 24 hours.

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How Much Do House Extension Cost in Airdrie?

Real prices from completed projects in Airdrie and the surrounding area. Costs vary by size, specification and access โ€” use these as a starting guide, then get 3 free quotes for your specific project.

Full cost guide โ†’
Single-storey extension
Rear or Side-Return Extension
£ 23,000 โ€“ £46,000

The most popular choice for UK terraces and semis. Adds a kitchen-diner or extra living space at ground level. Typically 3โ€“5m deep, completed in 10โ€“14 weeks.

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Double-storey extension
Full Double-Storey Rear Extension
£ 46,000 โ€“ £82,000

Maximum space gain in a single build โ€” adds a ground-floor room and a bedroom above. Strong ROI in most UK property markets. Requires full planning permission.

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Side Extension
Side-Return or Infill Extension
£ 15,000 โ€“ £34,500

Ideal for terraced homes with a narrow side alley. Transforms a cramped kitchen into a full-width open-plan space. Often combined with a rear extension.

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Your Project
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Costs depend on size, spec and access. The best way to know your exact price is to compare 3 quotes from local specialists.

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Airdrie pricing note: South Scotland (Glasgow, Edinburgh area) prices are broadly in line with or slightly below the English national average. Edinburgh's tight city centre can attract access surcharges; suburban projects are competitively priced. Prices shown are indicative ranges for Airdrie and South Scotland. Always get at least 3 written quotes before committing to any builder.

House Extension Specialists Who Know Airdrie

Tell us about your house extension project once and up to three local specialists who cover Airdrie get in touch with quotes — free, with no obligation, and you choose who to hire.

Most firms quoting in Airdrie also travel to nearby Tranent, Greenock and Arbroath. That matters because it widens the pool of South Scotland contractors competing for your job, which usually sharpens the price.

On price, South Scotland (Glasgow, Edinburgh area) prices are broadly in line with or slightly below the English national average. Edinburgh's tight city centre can attract access surcharges; suburban projects are competitively priced. Comparing three written quotes is the simplest way to see where your own Airdrie job sits inside that range.

Local facts: Airdrie

  • Local planning authority: North Lanarkshire Council
  • Region: Scotland
  • Town-centre postcode district: ML6
  • Average house price (North Lanarkshire local authority, June 2026): £156,446 (+3.8% year on year) — detached £322,772, semi-detached £185,168, terraced £144,494, flats £90,913

Planning-authority, region and postcode data: ONS Postcode Directory (Open Government Licence). House prices: HM Land Registry UK House Price Index for the local authority (OGL). Member coverage is each member's own registered base and travel radius.

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House Extension in Airdrie โ€” FAQs

Single-storey extensions in Airdrie typically run ยฃ2,000 to ยฃ3,000 per square metre, so a 20 square metre rear extension usually costs ยฃ40,000 to ยฃ60,000. Two-storey extensions cost more in total but less per square metre because the roof and foundations are shared.
Many single-storey rear extensions in Airdrie fall under permitted development, up to 3 metres for an attached house or 4 metres for a detached one, or up to 6 and 8 metres under the larger home extension prior approval scheme. Conservation areas, listed buildings and most side extensions need full planning permission, so check with your builder first.
A single-storey extension usually takes 10 to 16 weeks on site, and a two-storey extension 16 to 24 weeks, weather and access permitting. Allow time for design, planning and building regulations approval before work begins in Airdrie.
If your extension is built up to or astride a shared boundary, or involves digging near the foundations of a neighbouring property, the Party Wall Act applies and you must serve notice. Most Airdrie builders flag this early so a party wall surveyor can be arranged in good time.
Yes, almost all extensions need building regulations approval covering structure, insulation, drainage and fire safety, even when planning permission is not required. Your Airdrie builder works to these standards and arranges building control inspections at each key stage.

Plan Your house extension Project in Airdrie

Whether you're researching costs, checking planning rules, or comparing approaches before you commit, our editorial team has produced these guides to help Airdrie homeowners make informed decisions about their house extension project.

House Extension Cost Guide

Detailed UK price ranges, regional adjustments and worked examples for house extension projects.

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All House Extension Specialists

Browse our nationwide network of local house extension contractors covering all 519 UK towns.

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All Cost Guides

Compare prices across extensions, lofts, kitchens, bathrooms, roofing, driveways and solar projects.

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Planning your house extension project? Read these guides:

House Extension Near Airdrie

We also connect homeowners with local house extension specialists in towns surrounding Airdrie.

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Planning Your House Extension in Airdrie

Before you compare quotes, it's worth understanding the full UK price picture for house extension and how Airdrie sits within it. The guides below cover average costs, what affects your quote, and how to choose a builder you can trust.

UK House Extension Cost Guide

Full price ranges, worked examples and the factors that move your quote โ€” drawn from real project data across 519 UK towns.

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House Extension Across the UK

Browse house extension services nationwide, see what's typical in your region, and request quotes from any UK location.

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Planning Permission for House Extension in Airdrie

Find out whether your house extension needs planning permission in Airdrie, what Permitted Development limits apply, and how rules differ in conservation areas, Article 4 zones, and listed-building settings.

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More homeowner resources: all UK building guides, cost guides, planning permission, comparisons, how-to guides and industry insights.

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๐Ÿ›๏ธPlanning permission for House Extension in Airdrie?Check whether your project needs permission before you start — read our 2026 planning guide →
๐Ÿ’ฌ Not sure about something? Ask a building expert
Planning permission, costs, building regs, choosing a trade โ€” free answers from our editorial team, published for other homeowners too.
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