From £55k–£90k+
Double-Storey Extensions in the West Midlands
Add space on both floors at once — usually a bigger kitchen-diner downstairs and a master bedroom with en-suite above.
Benefits
Why homeowners choose double-storey extensions
- Best value per square metre across two floors
- Solves bedroom and living space at the same time
- Often unlocks a proper master suite
- Strong long-term value uplift
Who it suits
- Growing families needing bedrooms as well as living space
- Homes where the master bedroom is too small
- Properties where the footprint already supports a double-storey rear
- Multi-generational households
Cost guidance
What a double-storey extensions typically costs
Planning-stage range: from £55k to £90k+. What pushes a project up or down:
- Size and structural complexity
- Amount of glazing — sliders, bifolds, rooflights
- Kitchen specification and appliances
- Ground conditions and drainage
- Finish level — flooring, joinery, ironmongery
- Planning and design fees (separate from build cost)
Householder planning fees and professional design costs are separate from build cost. We make these visible from the start, not buried in the build.
Planning & regulations
Planning and building regs
Double-storey extensions usually require householder planning permission. We confirm the planning route as part of concept design and apply on your behalf.
Useful reading:
Process
How a double-storey extensions project runs with us
1
Free initial chat
Postcode, brief and rough budget. We come back with a planning-stage estimate and next steps.
2
Survey and concept design
On-site measure, brief workshop and concept tied to the budget.
3
Planning and building regs
Applications, structural calcs and building control sign-off coordinated end-to-end.
4
Build
One site team, weekly updates, kitchen and glazing coordinated for you.
5
Handover and aftercare
Snagging, certificates and a workmanship warranty issued at completion.
Recent work
Featured double-storey extensions projects
FAQs
Frequently asked questions
How much does a double-storey extensions cost?
Indicative planning-stage range: from £55k to £90k+. Final pricing depends on size, structure, glazing, kitchen spec, ground conditions, drainage and finishes. Full cost guide.
Do I need planning permission for a double-storey extensions?
Double-storey extensions usually require householder planning permission. We confirm the planning route as part of concept design and apply on your behalf. Read the planning guide.
How long does a double-storey extensions take?
Most single-storey projects take 10–14 weeks on site. Double-storey and wrap-around projects typically take 16–22 weeks. Planning and design lead in usually adds 8–14 weeks.
Will you handle planning and building regs?
Yes — applications, structural calcs and building control sign-off are coordinated as part of our design-to-build process.
Do you cover my area?
We work across the West Midlands including Birmingham, Solihull, Wolverhampton, Dudley, Walsall and Coventry.
Next step
Get a planning-stage estimate
Tell us about the project. We will come back with realistic budget guidance and likely process — no hard sell.