That empty roof space is not just dead air. With the right conversion, a bungalow loft can turn into something seriously useful—more room, more light, more value.
Whether you’re just curious or already sketching plans, knowing what’s possible (and what it costs) makes all the difference.
We’ll cover the main types of bungalow loft conversions, design ideas worth stealing, and what you can expect to spend.
Key Notes
- Most bungalow conversions cost between £35,000-£85,000, depending on conversion type.
- Four popular conversion types are Dormer, Hip-to-Gable, Velux, and Mansard.
- Most conversions fall under permitted development rights, avoiding planning permission.
- Traditional cut roofs convert more easily than modern trussed roofs
Converting Your Bungalow to a 2-Story
Bungalow loft conversions are having a moment.
And it makes sense: One-storey homes are sitting on a goldmine of untapped potential. With the right design and structure, you can double your living space without sacrificing your garden.
Whether you’re after an extra bedroom, a home office, or a quiet escape, a bungalow loft conversion lets you stay rooted while your home grows around you.
Can You Convert the Loft in a Bungalow?
Yes, in many cases, you can.
But it depends on a few key things. Most bungalows in the UK have generous roof space, which is good news.
However, head height could be a problem. If your loft space doesn’t offer at least 2.2 metres at its highest point, you’ll need structural changes like raising the roof – and that drives up the cost.
You also need to check what kind of roof structure you have. Traditional cut roofs are easier to convert than modern trussed roofs, which often need steel reinforcements.
Access is another factor. You’ll need to plan where to put the stairs without ruining the floor layout below.
When Planning Permission Is (& Isn’t) Needed
Most bungalow roof conversions fall under permitted development rights. That means you don’t need full planning permission as long as the build sticks to certain rules:
- The extension doesn’t exceed 40m² for terraced and 50m² for detached bungalows
- It doesn’t raise the roof ridge line
- Materials match the original build
- Dormer windows face the rear, not the road
You will need planning permission if you live in a conservation area, your bungalow is listed, or you’re altering the roof line significantly (like in a mansard loft conversion bungalow).
Regardless of planning, building approval is always required.
Types of Bungalow Loft Conversions
There are four main ways to convert a bungalow loft, each with pros, cons and different price tags:
Dormer Loft Conversion
A bungalow dormer loft conversion is the most common choice. It adds a box-like structure to the existing roof, creating usable head height and flat walls. Perfect for extra bedrooms or a bathroom.
- Works with most roof shapes
- Adds headroom and natural light
- Needs planning in some cases
- Boxy exterior look (if not designed well)
Hip-to-Gable Conversion
If your bungalow has a hipped roof, you’re probably losing space on the sides. A hip-to-gable conversion extends the sloped roof into a vertical gable, opening up the loft.
- Great for semi-detached bungalow loft conversions
- Adds significant usable floor area
- Structural work can be costly
- Only works on hipped roofs
Velux (Rooflight) Conversion
A Velux conversion is the least invasive route. It works with the existing roof shape, adding windows for light. Best if you already have decent headroom.
- Lower cost
- Minimal structural changes
- Doesn’t add space, just makes it usable
- Not suitable for low roofs
Mansard Conversion
Not common in bungalows, but a mansard conversion is an option to maximise space. It involves raising the side walls and flattening the roof to create a whole new storey.
- Huge increase in floor space
- Allows multiple rooms
- High cost and complexity
- Requires planning permission
How Much Does a Bungalow Loft Conversion Cost?
On average, a bungalow loft conversion cost starts at around £35,000 for a basic Velux setup and can exceed £80,000+ for large-scale structural projects.
Here’s a breakdown:
| Type | Adds Space | Major Structural Work | Planning Permission | Avg. Cost Range |
|---|---|---|---|---|
| Velux | ❌ | ❌ | ❌ | £35,000 - £45,000 |
| Dormer | ✔️ | ❌ | ❌/✔️ | £45,000 - £60,000 |
| Hip-to-Gable | ✔️ | ✔️ | ✔️ | £50,000 - £65,000 |
| Mansard | ✔️✔️ | ✔️✔️ | ✔️ | £70,000 - £85,000+ |
Breakdown of Typical Costs:
- Labour: £15,000 – £25,000
- Materials: £10,000 – £20,000
- Design/architect fees: £3,000 – £5,000
- Structural engineering: £2,000 – £4,000
- Bathroom/kitchen fit-out: £5,000 – £10,000
Factors That Affect Cost
- Roof shape and pitch
- Structural complexity
- Plumbing and rewiring
- Staircase placement
- Quality of materials and finishes
Design Ideas for Bungalow Loft Conversions
Whether it’s a compact guest room or a luxurious master suite, design matters.
Here’s how to make the space work for you:
Best Layout Ideas
- Master suite with ensuite
- Nursery with storage built into eaves
- Loft living room or cinema den
- Remote working space with soundproofing
Got a dormer? Look into dormer bungalow bedroom ideas like floor-to-ceiling windows, built-in wardrobes, and private balconies.
Staircase Positioning Tips
Good stair placement keeps your ground floor functional. Try:
- Over existing stairs to save space
- Hallway access for privacy
- Spiral or space-saving options for small bungalow loft conversion stairs
Lighting & Ventilation
Let that light in. Combine skylights, dormers and even Juliet balconies to brighten your space.
Proper ventilation is also important, especially if you’re adding an ensuite.
Frequently Asked Questions
What is a dormer bungalow?
A dormer bungalow is a one-storey home with a partial upper floor built into the roof, with dormer windows extending outwards. It often means there’s already headroom for a loft conversion or partial second floor.
What is the bungalow dormer loft conversion cost on average?
You’re looking at around £45,000 – £60,000 for a standard dormer loft. Price varies depending on the size, design features and any required structural changes.
How much is the cost of adding a second floor to a bungalow in the UK?
Expect to pay £75,000 – £150,000+. It depends on how much of the roof is rebuilt, how many rooms you’re adding and if you’re doing a full converting bungalow to 2 2-storey job or just adding one large space.
Conclusion
A bungalow loft conversion can completely change how your home works for you — more space, better flow, and a serious boost in value.
Whether you’re eyeing a guest suite, home office or just need to make room for a growing family, the options are broad. But so are the costs and build choices. The key is picking the right conversion type for your roof, your layout, and your budget.
If you’re weighing up your next steps, we can take a look, walk you through what’s possible, and quote accordingly. Reach out today for a free quote tailored to your home.
