⚡ Demo mode — Payments are in Stripe test mode. No real charges will be made. Use card 4242 4242 4242 4242 to test.
Step 1
Where are you?
Labour rates vary by up to 38% across UK regions
Step 2
What work do you need?
Select a trade category
🏗
Extension / Build
£1,500–£3,200/m²
🔨
Loft Conversion
£28k–£72k
🍳
Kitchen Renovation
£8k–£45k
🚿
Bathroom Fit-Out
£4k–£18k
⚡
Electrical Works
£400–£12k
🔧
Plumbing & Heating
£300–£8.5k
🏛
Structural Works
£2k–£35k
🎨
Decoration
£200–£4.5k
Step 3
Extension details
Adjust sliders to match your project scope
Floor area (m²)30m²
Number of storeys1
✓
Planning application & drawings
+£3,500
Structural engineer calculations
+£2,800
10-year structural warranty
+£1,200
Party wall agreement
+£900
Extensions typically cost between £1,500–£3,200/m² depending on specification. Single storey rear extensions are most affordable. Bi-fold doors, underfloor heating and vaulted ceilings add 15–35% to base costs. Always budget a 15% contingency on top of your estimate.
Estimated project cost
£55,400 – £80,600
South East · Mid-Range · 30m²
£36,200
Labour
£26,300
Materials
£8,100
Prelims & fees
🔒 Line-item breakdown
See exactly how costs split across labour, materials and prelims