💡 Don't move, Improve (AL it)
Find out what your extension is really worth
Double-Storey Extension Drawings & Prices
For double-storey rear and side extensions across Milton Keynes, London and the surrounding counties.
Price from
£1695
Planning permission
A complete set ready for your planning submission:
- Measured survey of your existing home, drafted into accurate plans
- Proposed floor plans, elevations and site plan for both storeys
- All supporting documents prepared to council standards
- We liaise with the council and planning officer through to decision
Price from
£1150
Structural calculations and drawings
Prepared and signed by a qualified structural engineer:
- Beam, foundation, wall and roof-load calculations to UK standards
- Steel/RSJ sizing, padstones and connection details
- Builder-ready and accepted by Building Control
Price from
£795
Building regulation drawings
The technical drawings your builder and Building Control actually build from:
- Detailed floor plans, sections, elevations and construction details
- Foundations, walls, roof, drainage, ventilation, insulation and fire-safety detailing
- Fully coordinated with your structural calculations
- Prepared to pass Building Control first time, not to be redone on site
Price from
£150
Milton Keynes
Site Survey
- Full measured survey of your existing property using laser/point-cloud tools
- Accurate to the millimetre, the foundation every good drawing is built on
- Outside Milton Keynes: from £275 (covers travel and time on site)
Planning submission fees
(paid to the local authority, not to us)
These are statutory fees set by your council, separate from our drawing fees:
- Permitted Development application: £349 (not included)
- Full householder planning application: £548 (not included)
- We handle the submission and correspondence on your behalf.
A two-storey extension is one of the best-value ways to add space to a home, but it also carries more structural and planning weight, so the drawings have to be right. Our pricing reflects genuine experience on projects like yours: competitive, transparent, and built to get approved and built without expensive surprises.
Planning drawings from £1,695
Fixed price. No hourly surprises. Quote confirmed before we start.
What each service costs
The Complete Approval Pack: from £3295
Everything you need from idea to approved-and-buildable, bundled and discounted:
Planning drawings + Building Regulation drawings + Structural calculations + Measured survey, bundled and discounted.
One team, one fixed price, everything coordinated. From first idea to approved and ready to build. For a project this size, having planning, building regs and structural all speaking to each other is where the real money is saved.
Why homeowners choose AL-Haitham
- 15+ years and 300+ completed projects: you're not paying for someone's learning curve [CONFIRM figures]
- Autodesk-Certified Revit & point-cloud technology: faster, more accurate drawings, fewer errors
- Fixed, transparent pricing: you know the full cost before we lift a pencil
- One team, start to finish: planning, building regs and structural, all coordinated so nothing falls through the cracks
Ready to plan your double-storey extension?
Start free: Try our 60-second extension cost calculator.
Then: Book your £195 Feasibility Blueprint:
planning-risk check, concept direction and costs, 100% credited to your project if you go ahead.
Prefer to talk? WhatsApp us on +44 7404 086195.
Get a free quote
WhatsApp: +44 74040 86195
E-mail: contact@al-haitham.co.uk
Address: Office F7, Gloucester House, 399 Silbury Blvd, Milton Keynes MK9 2AH