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Wimbledon (SW19) is one of South-West London's most desirable locations, known for its leafy streets, period homes, excellent schools, and strong transport links. Whether you live near Wimbledon Village, close to Wimbledon Common, around South Wimbledon, near Raynes Park, close to Wimbledon Station, or along Alexandra Road, a loft conversion is one of the most effective ways to increase space without leaving the area.
A very common question local homeowners ask is: Do I need planning permission for a loft conversion in Wimbledon?
This guide explains the rules, exceptions, Wimbledon loft conversion costs, and the loft styles best suited to SW19 homes.
Do You Need Planning Permission for a Loft Conversion in Wimbledon?
Many Wimbledon homes qualify under Permitted Development (PD) rights, meaning planning permission is often not required — provided specific limits are respected.
However, Wimbledon has several conservation areas, so requirements can vary by street.
When Loft Conversions Do Not Need Planning Permission
A loft conversion can usually proceed under PD if:
- Added volume is up to 40m³ for terraced homes
- Added volume is up to 50m³ for detached or semi-detached homes
- No dormer faces the road
- Dormer is set back at least 20cm from the eaves
- External materials match the existing house
- Side-facing windows use obscure glazing
- No balconies or raised platforms are added
These rules typically apply in parts of South Wimbledon, Raynes Park, Wimbledon Chase, and residential streets away from protected zones.
When Loft Conversions Do Require Planning Permission
You will need planning approval if:
- Your home is in a conservation area (parts of Wimbledon Village, Wimbledon Park, Merton Park, and roads near Wimbledon Common fall under this)
- You want a front dormer
- You plan a mansard loft
- Roof height must be increased
- PD rights were previously used
- You live in a flat, maisonette, or converted property
Buildaway offers a free PD eligibility check for Wimbledon homeowners.
Types of Loft Conversions in Wimbledon
Wimbledon's mix of Victorian houses, Edwardian semis, and detached family homes supports several loft conversion designs.
Velux / Rooflight Loft Conversion
Best for properties with good existing roof height.
- Lowest cost option
- Minimal external alteration
- Often planning-free
- Ideal for simple loft layouts
Rear Dormer Loft Conversion
Extremely popular across SW19.
- Adds substantial usable space
- Suitable for bedrooms with en-suites
- Often allowed under PD
Hip-to-Gable Loft Conversion
Common in semi-detached and end-of-terrace homes.
- Converts the sloping hip into a vertical gable
- Often paired with a rear dormer
- Increases floor width and headroom
Mansard Loft Conversion
Used where maximum space is needed.
- Always requires planning permission
- Offers the most flexible internal layout
- Often chosen for larger period homes
How Much Does a Loft Conversion Cost in Wimbledon?
Loft conversion pricing depends on property type, structure, and finish. Here's an accurate SW19 cost guide:
| Type of Loft Conversion | Typical Loft Conversion Cost Wimbledon |
|---|---|
| Velux / Rooflight | £25,000 – £35,000+ |
| Rear Dormer | £35,000 – £55,000+ |
| Hip-to-Gable | £50,000 – £65,000+ |
| Mansard | £60,000 – £80,000+ |
Additional Costs
- En-suite bathroom: £4,000 – £8,000+
- High-spec glazing: £2,000 – £6,000+
- Bespoke staircase: £1,500 – £4,000+
These figures reflect standard loft conversion prices in Wimbledon.
Loft Conversion Building Regulations in Wimbledon
All loft conversions must comply with Building Regulations, regardless of planning requirements.
This includes:
- Part A – Structural safety
- Part B – Fire protection (escape route, alarms, fire doors)
- Part K – Staircase safety
- Part L – Insulation and energy efficiency
- Part P – Electrical safety
Buildaway manages drawings, inspections, and final certification.
Benefits of a Loft Conversion in Wimbledon
Increases Property Value
Homes near Wimbledon Village, Wimbledon Park, Raynes Park, and Wimbledon Common often see value increases of 10%–20%.
More Practical Than Moving
Adding space is often cheaper than relocating within SW19.
Creates Versatile New Rooms
Popular uses include:
- Master bedroom with en-suite
- Home office
- Guest room
- Children's bedrooms
- Fitness or hobby room
Works for Many Wimbledon Home Styles
From Victorian terraces to larger detached homes, most properties adapt well to loft upgrades.
FAQs
Do Wimbledon loft conversions need planning permission?
Many fall under PD, but conservation areas and major roof changes require approval.
How long does a loft conversion take in Wimbledon?
Most SW19 projects take 6–10 weeks, depending on structure.
How much does a loft conversion cost in Wimbledon?
Most projects range from £35,000–£60,000, depending on design.
Is Building Regulations approval mandatory?
Yes — all loft conversions must meet safety and structural standards.
How much extra does an en-suite cost?
Typically £4,000–£8,000+, based on layout and fixtures.
Bringing It All Together
Whether you live near Wimbledon Village, South Wimbledon, Raynes Park, Wimbledon Common, Wimbledon Park, or Wimbledon Chase, a loft conversion is one of the strongest ways to add space and long-term value to your home.
Buildaway provides complete loft conversion services across SW19, including:
Transparent pricing
Planning guidance
High-quality workmanship with an 18-month warranty