Rear Extension vs Side Extension: Which Adds More Value?
Rear or Side? The Key Decision
When homeowners decide to extend, one of the first questions is: should we go out the back or down the side? It’s not always obvious. Both approaches work, but they have different benefits, costs, and planning implications. In this guide, we’ll break down the pros and cons of each, help you understand planning rules in Nuneaton and Warwickshire, and explain which typically adds more value.
Understanding Rear Extensions
A rear extension projects backward from your existing house, adding space to the rear elevation. Most rear extensions are 4–6 metres deep and run the full width (or most of the width) of your property.
Typical Uses
Rear extensions are usually built for kitchens, dining areas, or living rooms. They’re popular for open-plan living—you remove the back wall of your kitchen and extend the space, creating a bright, social area with garden views. A rear extension draws natural light in and opens your home to the garden.
Size and Scale
Single-storey rear extensions in Nuneaton typically measure:
– Depth: 4–6 metres (sometimes up to 8m under Permitted Development rules)
– Width: 80–100% of the property width
– Area: 20–40 square metres
Double-storey rear extensions are less common but add a bedroom or office above the kitchen extension.
Rear Extension Costs (2026)
- 4m × 5m single-storey: £45,000–£65,000
- 5m × 7m single-storey: £60,000–£85,000
- Double-storey: £85,000–£150,000+
Planning Rules for Rear Extensions in Nuneaton
Most single-storey rear extensions qualify for Permitted Development, meaning no planning permission is needed—only Building Regulations approval. The rules state:
- Single-storey extensions are allowed if under 4 metres high and no more than 50% of the original footprint (or 8 metres deep, whichever is less)
- The extension must not extend beyond a 45-degree line from the closest window of a neighbouring property
- Extensions in conservation areas may require planning consent
Double-storey extensions require full planning permission in almost all cases.
Advantages of Rear Extensions
- Natural light: They face the garden, letting in southern/western sun.
- Garden connection: Bifold doors blur the line between indoor and outdoor space.
- Permitted Development: Usually no planning permission needed for single-storey builds.
- Larger spaces possible: You can build out significantly without hitting side-boundary issues.
- Value addition: Open-plan rear extensions are highly desirable—many buyers prioritize this.
Disadvantages
- Garden loss: You lose usable garden space.
- Shadowing: Rear extensions can cast shade onto the extension itself or neighbouring gardens (check the 45-degree rule).
- Overshadowing objections: Neighbours may object during planning if you go for a double-storey.
Understanding Side Extensions
A side extension projects out from the side of your property, using the space between your house and the boundary line.
Typical Uses
Side extensions are often used for:
– Additional living rooms or playrooms
– Garages or car ports (occasionally)
– Access improvements (creating a side hallway)
– Extensions to irregular-shaped properties (where a rear extension doesn’t work as well)
Rarely, a side extension becomes a side-and-rear (wraparound) for even more space.
Size and Scale
Side extensions are typically narrower than rear extensions:
– Depth: Variable, usually 5–8 metres
– Width: 2–4 metres (constrained by side boundary)
– Area: 12–32 square metres
Side Extension Costs (2026)
- 2m × 5m single-storey: £35,000–£50,000
- 3m × 7m single-storey: £50,000–£75,000
- Double-storey: £75,000–£130,000+
Planning Rules for Side Extensions in Nuneaton
- Single-storey: Often Permitted Development (same 4m-high, 50%-footprint rule), but size is limited by side-boundary distance
- Double-storey: Always requires planning permission; much harder to approve than single-storey
- Flank walls: If your property is semi-detached and you’re extending the flank (side) that’s against a neighbour, planning rules are strict
- Conservation areas: Likely to need consent
Advantages of Side Extensions
- Less garden loss: Your garden stays relatively intact.
- Privacy: Extending sideways is less likely to overshadow neighbours.
- Useful for odd-shaped plots: If your garden is narrow but you have side space, a side extension is perfect.
- Parking or utility space: Great for adding a garage, store, or car port.
- Double-storey potential: Easier to build double-storey on a side extension than rear (fewer neighbour objections).
Disadvantages
- Limited by boundary: Nuneaton properties often have small side gaps—you may only gain 2–3 metres width.
- Darker spaces: A side extension gets less natural light than a rear one.
- Semi-detached complications: If your neighbour also wants to extend, you may block their opportunity.
- Lesser value addition: Side extensions add less value than rear ones (they don’t create the sought-after open-plan living).
Rear vs Side Extension: Cost Comparison
| Factor | Rear | Side |
|---|---|---|
| Single-storey cost | £45k–£85k | £35k–£75k |
| Planning permission | Usually not needed | Usually not needed (single-storey) |
| Garden loss | Significant (20–40 sqm) | Minimal |
| Natural light | Excellent | Good (but directional) |
| Value added | High (£15k–£30k+) | Moderate (£10k–£20k+) |
| Build complexity | Medium | Medium–High (boundary issues) |
Which Adds More Value?
Research consistently shows rear extensions add more value than side extensions. Here’s why:
- Open-plan demand: Buyers love the kitchen-diner hybrid. A rear extension with bifolds and garden access is a huge selling point.
- Light and space perception: Rear extensions feel larger because they’re brighter.
- Rare in older housing stock: Properties with open-plan extensions are still relatively uncommon in Nuneaton—they command a premium.
- Functional layout: A rear extension naturally becomes the heart of the home, improving flow and family living.
Typical value uplift:
– Rear extension (20–30 sqm): adds £20,000–£35,000 to resale value
– Side extension (15–25 sqm): adds £10,000–£20,000 to resale value
However, this depends on your property type, location, and what you’re adding. A side extension with an en-suite bedroom upstairs might be more valuable than a downstairs rear extension in a three-bed detached.
When to Choose Side Instead of Rear
Side extensions make sense if:
– Your garden is tiny: You can’t afford to lose more space.
– You need a bedroom or office: A double-storey side extension is often easier to get approved than double-storey rear.
– Your property is semi-detached: Extending sideways doesn’t impact a shared boundary as much as extending back toward an adjacent rear boundary.
– You’re in a conservation area: Side extensions sometimes face fewer heritage objections.
– You have side access issues: A side extension can improve entry to your garden or parking.
The Wraparound Solution
Don’t overlook wraparound extensions (rear + side combined). These create maximum space and are sometimes easier to approve than a very large single rear extension. A wraparound might give you:
– A large open-plan kitchen-diner (rear)
– An additional utility room or snug (side)
– Better proportions and balance
Wraparound extensions typically cost 20–30% more than single rear or side, but they transform the property.
Local Nuneaton Context
Nuneaton is a mix of Victorian terraces, 1950s semi-detached homes, and modern estates. This affects what’s practical:
- Victorian terraces: Often narrow with small back yards. Many benefit from well-designed side extensions (using the side return) or modest rear extensions. Double-storey rear is tricky due to neighbouring properties.
- Semi-detached 1950s homes: Typically 25–30-metre gardens with clear side space. Either rear or side works; rear is more popular for added value.
- Modern estates: Larger plots, more flexibility. Rear extensions are dominant; side extensions rarer.
Your property type will steer you toward one or the other naturally. We assess your plot during the initial consultation.
Making the Decision: Our Approach
At Parker Grears, we help you weigh both options:
- Site assessment: We look at your garden size, boundary conditions, existing structure, and neighbouring buildings.
- Planning appraisal: We advise whether rear, side, or wraparound is most likely to gain approval (and value).
- Design sketches: We show you rough layouts for each option, so you can visualize and compare.
- Cost and timeline: We quote both, so you can make an informed choice.
- Build management: We handle all paperwork, liaisons, and on-site work.
Start Your Extension Project
Whether you’re leaning toward rear, side, or wraparound, we can guide you through every step. We’re FMB members, TrustMark registered, and have built 100+ extensions across Nuneaton, Hinckley, and Coventry.
Call Parker Grears Developments on 07731015784 or visit www.parkergrears.com to discuss your extension idea. Our first consultation is free.
Parker Grears Developments Ltd, Nuneaton, CV10 8ER. 25+ years experience, 5-star Google reviews, fully insured.