You love your home. Maybe it’s the way the light hits your garden in Bognor Regis on a summer morning, or perhaps it’s the quiet, historic charm of your street in Arundel. But let’s be honest: your bungalow is starting to feel a little tight. Whether your family is growing, you’ve started working from home permanently, or you simply want that master suite you’ve always dreamed of, the "bungalow squeeze" is a common problem across West Sussex.

The traditional solution? Moving. But in 2026, with the West Sussex property market remaining as competitive as ever, moving house often means sacrificing the location you love, paying significant stamp duty, and dealing with the stress of a chain.

What if you could stay exactly where you are and simply double your square footage?

At Swanbourne Construction Ltd, we’ve spent over 20 years helping homeowners in Chichester, Bognor, and Arundel transform modest bungalows into stunning, two-storey family homes. Adding a second floor, often called a "roof lift", is one of the most rewarding renovations you can undertake. It’s a complex journey, but when broken down into these five essential steps, it becomes a manageable path to your dream home.

Step 1: The Structural "Health Check"

Before we even look at paint swatches or window designs, we have to look down. Bungalows were originally designed to support only themselves and a roof. When you add a second floor, you are significantly increasing the "dead load" (the weight of the building materials) and the "live load" (the people and furniture inside) on the existing structure.

The Trial Hole Investigation
One of the first things we do at Swanbourne Construction Ltd is dig what we call "trial holes." These are small, strategic excavations next to your home's external walls. Why? We need to see exactly how deep your foundations go and what kind of soil they are sitting on.

In many parts of Chichester, we deal with silty or clay-heavy soils that require specific structural considerations. If your foundations are shallow, don’t panic. While underpinning (strengthening the existing foundations) is an option, we often recommend timber-frame construction for the new upper level. It is significantly lighter than traditional brick and block, often allowing us to build upward without needing to reinforce the ground beneath.

Step 2: Navigating the West Sussex Planning Maze

Adding a full second floor is a major change to the "street scene," which means you will almost certainly need full planning permission. Unlike smaller loft conversions in Chichester, a total roof lift changes the height and profile of the building.

Local Context Matters
Planning rules aren't universal; they vary significantly between Chichester District Council and Arun District Council.

In Arundel and Chichester: If you live in or near a Conservation Area, planners will be very protective of the historic aesthetic. You might be required to use specific materials, like traditional slate or even flint work, to ensure the new level blends seamlessly with the heritage of the area.
In Bognor Regis: While there may be more flexibility, planners will still look closely at "overshadowing." They want to ensure your new height doesn't block the natural light of your neighbours.

With over two decades of local experience, we understand these nuances. We work closely with architects who know exactly what local planners are looking for, helping you navigate the process with fewer headaches and faster approvals.

Step 3: Design for Lifestyle and Views

This is the exciting part. You aren't just adding rooms; you’re reimagining how you live. A second-floor transformation allows you to "zone" your home, keeping the ground floor for social, open-plan living and the new upper floor as a private sanctuary.

The Staircase Challenge
Where the stairs go is the most critical design decision on your ground floor. A poorly placed staircase can ruin the flow of your existing rooms. We look for "dead space", perhaps a large hallway or a small third bedroom, to house the stairs, ensuring you don't lose the functionality of your house extensions in West Sussex.

Capturing the Sussex Light
If you’re lucky enough to be near the coast in Bognor Regis, your new second floor is your chance to finally see the sea. We often design these transformations with "inverted living" in mind, or at the very least, large Juliette balconies and floor-to-ceiling glazing to soak up that famous South Coast sunshine. Imagine waking up to a view of the South Downs or the spire of Chichester Cathedral, views that were completely hidden when you were living on a single level.

Step 4: Preparing for the Construction Phase

We’ll be honest with you: adding a second floor is a major surgical operation for your house. For a period of 4 to 6 months, your home will be a construction site.

Do you have to move out?
In almost every case, yes. We strongly advise our clients to find alternative accommodation during the "big lift." Once we remove the existing roof, the house is vulnerable to the elements (even with the best scaffolding and "top hat" covers). Moving out allows our team to work faster, keeps your furniture safe from dust and moisture, and: crucially: saves you from the stress of living without a roof over your head.

The "Watertight" Race
Our goal is always to get the new structure "watertight" as quickly as possible. This involves:

Stripping the old roof.
Installing structural steelwork (RSJs) to support the new floor.
Erecting the new walls and the new roof structure.
Installing windows and doors.

Once the building is sealed, the internal "fit-out" begins: plumbing, electrics, and those beautiful bathrooms in Bognor Regis you’ve been dreaming of.

Step 5: Understanding the Investment (2026 Perspective)

Is it worth it? From a financial perspective, adding a second floor to a bungalow in West Sussex is one of the smartest investments you can make.

In the current 2026 market, high-quality construction costs in the South East range between £1,800 and £2,500 per square metre. When you compare this to the cost of buying a larger home: factoring in the higher purchase price, estate agent fees, and the hefty Stamp Duty: the "build up" option often comes out on top.

Future-Proofing Your Asset
Beyond the immediate increase in square footage, you are significantly increasing the resale value of your property. A four-bedroom, two-bathroom house in a prime Chichester or Arundel location is a highly sought-after asset. By adding a second floor, you aren't just fixing a space problem; you are future-proofing your family’s largest financial investment.

Why Choose Swanbourne for Your Transformation?

Adding a level to your home isn't a job for a general handyman. It requires structural precision, local planning knowledge, and a team that respects your property as much as you do.

At Swanbourne Construction Ltd, we pride ourselves on being more than just builders; we are your partners in this transformation. With over 20 years of experience serving the Bognor Regis, Chichester, and Arundel communities, we’ve seen every type of bungalow and solved every type of structural puzzle.

Whether you are just starting to wonder "what if?" or you already have a set of drawings in your hand, we are here to help. Our approach is consultative and professional, ensuring that the finished product isn't just a house with an extra floor: it’s the home you’ve always wanted to live in.

Ready to see what's possible for your West Sussex bungalow?

Explore our previous projects to see real-life transformations we've completed across the county, or head over to our FAQ page to get answers to your most pressing renovation questions.

If you’re ready to take the first step toward doubling your space, contact us today for a casual, no-pressure chat about your vision. Let’s build something incredible together.