The True Cost of Renovation in London
What Homeowners Need to Know Before They Build, Break, or Budget
Renovating in London isn’t just about vision—it’s about precision. With property values soaring and expectations rising, homeowners must navigate a complex landscape of costs, regulations, and design choices. At NOVOCS, we believe transparency is key. So let’s break down the real numbers behind London’s renovation scene in 2025.
Average Cost Per Square Metre
Renovation costs vary widely depending on scope, finish level, and property type. Here’s a general guide:
| Renovation Type | Cost Range (per m²) |
|---|---|
| Basic Interior Refurbishment | £650 – £1,100 |
| Mid-Range Renovation | £1,500 – £2,000 |
| High-End Renovation | £2,300 – £2,500+ |
For a full renovation of a three-bedroom home, expect to spend between £48,000 and £97,000—and more if structural changes or extensions are involved.
What Drives the Cost?
Several factors influence your final budget:
- Property Age & Condition: Older homes may require rewiring, damp treatment, or structural reinforcement.
- Location: Labour and logistics in central London cost more than outer boroughs.
- Scope of Work: Cosmetic upgrades are cheaper than full-scale refurbishments.
- Design Complexity: Bespoke joinery, luxury finishes, and architectural features add premium.
- Planning & Permits: Conservation areas or listed buildings require additional approvals and fees.
Breakdown of Key Expenses
| Category | Typical Cost Range |
|---|---|
| Labour | 30–50% of total budget |
| Materials | Varies by quality & source |
| Specialist Services | £50–£150/hr (architects, engineers) |
| Permits & Inspections | £500–£2,000+ |
| Contingency | 10–20% of total budget |
NOVOCS provides detailed estimates upfront, helping clients avoid budget creep and unexpected costs.
Extension & Loft Conversion Costs
Thinking bigger? Here’s what to expect:
- Rear Extension: £1,800–£2,500/m²
- Loft Conversion: £40,000–£70,000
- Basement Dig-Out: £250,000+ (due to excavation, waterproofing, and structural work)
These projects require structural calculations, party wall agreements, and often planning permission.
How to Renovate Smart in 2025
To maximise value and minimise stress:
- Phase your renovation to maintain livability
- Invest in energy efficiency (triple glazing, heat pumps)
- Choose timeless finishes over fleeting trends
- Work with trusted contractors like NOVOCS for clarity, craftsmanship, and compliance
📞 Ready to Renovate?
Whether you’re budgeting for a bathroom refresh or planning a full-scale transformation, NOVOCS offers tailored solutions that balance cost, quality, and vision.
👉 Explore our renovation services or contact us at info@novocs.co.uk for a personalised quote.
