Loft conversion specialists working across Southwick and the Adur coast. We design and build dormer, hip-to-gable, Velux, mansard and L-shape conversions on terraced, semi-detached and detached homes, with in-house architectural support on every project. Contact us for a free, no-obligation quote on your Southwick loft conversion.
Thinking about a loft conversion in Southwick? In a town built this closely together, the thing that shapes the job is rarely the council. It is the houses either side of yours. BN42 is largely terraced and semi-detached homes in long, consistent runs, which means most conversions here involve at least one shared wall, a roofline that reads as part of a set rather than on its own, and a plot where scaffolding and deliveries have to be planned rather than assumed.
None of that stops a conversion. It just decides how one is designed and run. A shared wall brings the Party Wall etc. Act into play, so notices need serving before work starts, and that timing is the single most common reason a Southwick build starts later than the owner expected. A continuous run of roofs means a rear dormer usually sits comfortably out of sight while anything on the front elevation is much more noticeable. And a narrow plot means access is worth solving on paper at the quote stage, not on the first morning. We look at all three at the first visit, alongside the ridge height, the roof structure and where a staircase can land.
As loft conversion builders working across Southwick, we take a joined-up approach from first drawing to finished room. Our in-house architectural support covers layout planning, structural coordination and technical drawings, and prepares a planning application or Lawful Development Certificate where one is needed, with Adur District Council as the planning authority. Everything is built to current Building Regulations. Contact us for a free, no-obligation quote.
The right conversion for a Southwick home depends on the roof shape, how much floor area you want to gain, and how visible the change will be from the street. Five types come up across BN42. On a terrace or a semi, what happens at the rear is generally a good deal simpler than anything that alters the front elevation, and that tends to steer the choice as much as the roof itself does.
The workhorse conversion on Southwick’s terraced and semi-detached housing. A dormer projects out from the rear roof slope to create standing headroom and a flat ceiling, and it usually returns the most usable floor area of the five types. On a run of similar houses a rear dormer is largely hidden from the street, which is one reason it is the most common answer here. Outside the conservation area it may fall within permitted development rather than needing a full application, subject to the usual limits.
Available where the house has a hipped roof with a side slope, which in a tightly built town generally means an end-of-terrace or a semi rather than a mid-terrace. Rebuilding that slope up to a full gable recovers volume the hip would otherwise lose. Because it changes the outline of the house from the side, it is worth considering how the new gable will read against the neighbouring roofs, and it is commonly paired with a rear dormer to square off the new floor.
The least invasive option, and a sensible one where the ridge is already high enough and you would rather not change the outside at all. We strengthen the structure, insulate, board the floor and fit rooflights for daylight, leaving the roof plane as it is. It is the option least likely to need planning permission on a house, it keeps a shared roofline uninterrupted, and it is usually the quickest and least disruptive to the neighbours as well as to you.
The most transformative of the five, rebuilding a roof slope to near vertical for the maximum floor area and headroom. Full planning permission is almost always needed and the change to the house is substantial, which on a continuous terrace makes how it sits against the adjoining roofs a central design question rather than a detail. Worth confirming the position with Adur District Council and a planning consultant before the idea gets far.
Suited to houses carrying a two-storey rear projection, adding a dormer to both that projection and the main roof to create an L-shaped upstairs layout. It gives noticeably more than a standard dormer without the planning weight of a mansard, and because the work is all at the rear it keeps the street elevation untouched. It only works where the rear projection exists, so it is one of the first things we check.
The best conversion is the one your house will actually take, so we design around the structure you have rather than from a standard layout. On a Southwick terrace or semi that means looking carefully at where the staircase can land without wrecking the landing below, how far a dormer can go back before it starts to overshadow next door, and what the party wall will allow. Houses in a matching run often have more roof volume than owners assume, and the neighbours’ completed conversions are frequently a useful guide to what has already been accepted locally.
Worthing is our base and Southwick sits a short way east along the same coastal strip, so getting to site is quick and a call mid-build is easy to answer. We work across the Adur towns regularly and know the planning picture under the Adur and Worthing shared service, as well as the practical realities of building in a town where plots are narrow, parking is tight and the house next door is genuinely next door. You get a local team, consistent standards, and a crew that keeps a tidy site because there is not much room to be untidy in.
Our team and specialist partners work to a finish that holds up close: level floors, plumb walls, clean plaster lines and joinery fitted properly. Where the conversion is visible outside, the new tiles, cladding and window lines have to sit right against the neighbouring roofs, because on a matching terrace a poorly detailed dormer is obvious from a long way down the road. All work is carried out to current Building Regulations, with coordination at the relevant stages with your Building Control inspector. Recent projects are shown in the gallery below.
Six stages take a Southwick loft from first visit to finished room. Our in-house architectural support carries the design and any application and we build the job, so the parts that stay with you are few and flagged early: Party Wall notices, appointing Building Control and any listed building consent are the homeowner’s responsibility, and are best discussed with a surveyor, architect or the council. On a terrace or a semi the party wall step is worth starting sooner than most people expect.
We visit your Southwick home, measure floor to ridge, check head heights and look at the roof structure, then talk through what the space could realistically deliver. We also walk the outside: which walls are shared, where scaffolding can stand, and how materials will reach the site on a narrow plot. Those answers shape the quote as much as the roof does. No cost and no obligation.
If drawings already exist we will price against them. If not, our in-house architectural support takes on the design, working up the layout and the technical drawings needed for an application or a certificate. One team carries the scheme from first sketch to site, and a detailed quote and outline programme come with the drawings.
Where a planning application or Lawful Development Certificate is required, our architectural partners can prepare and submit it to Adur District Council for you. This is also the point to get Party Wall notices moving, since on a Southwick terrace or semi they usually apply and they carry their own notice period. Serving them is the homeowner's legal responsibility and cannot be done by the builder, so it is worth talking to a party wall surveyor early. Confirm the planning position for your own address directly with the council.
Construction begins once consents, drawings and structural calculations are in place. Duration depends on the conversion type and the property, and an indicative programme is set out at quote stage. The opened roof stays weatherproof throughout. On Southwick's tighter streets we stage deliveries and plan the skip and scaffold around parking rather than assuming space will be free, which keeps the disruption to your neighbours down and keeps the job moving.
You appoint Building Control, either through the local authority or an approved inspector, and you book the visits. We build to the current regulations and give you notice when each stage is ready for inspection, so nothing is covered up before it has been seen.
When the final inspection has been signed off we hand the finished loft over. Keep the completion certificate with your property records, together with any planning documents, Lawful Development Certificate and party wall award, since all of them get asked for when the house is sold.
A selection of recent loft conversion projects completed across the Adur towns, the West Sussex coast and the wider Sussex area, spanning several conversion types and property sizes. If you would like to see work on a house of a similar type to yours, get in touch and we will share the relevant examples.
The notes below are general context for Southwick homeowners considering a loft conversion and do not constitute legal advice. Always confirm the position for your property with Adur District Council, and where relevant with an architect, planning consultant or party wall surveyor, before any work starts.
Planning authority. Planning in Southwick is handled by Adur District Council through the shared Adur and Worthing planning service, which also covers Shoreham-by-Sea and Lancing.
Conservation area. Southwick has a conservation area centred on The Green and the older frontages around it, where permitted development rights are usually restricted and a full application is more likely.
Permitted development. Across the rest of the town many loft conversions proceed under permitted development, subject to the usual volume and position limits and to any Article 4 Direction, with a Lawful Development Certificate worth obtaining for your records.
Listed buildings. Listed buildings are concentrated around The Green, the older core and the parish church. Listed building consent is separate from, and additional to, planning permission.
Party wall. With so much of Southwick terraced or semi-detached, a Party Wall notice applies to most conversions here. Serving it is the homeowner’s legal responsibility, it carries a notice period, and a builder cannot do it for you.
Coastal and tidal flood risk. Ground near the harbour, the canal and the Adur estuary falls within Environment Agency tidal and surface water flood zones. It affects ground works far more than a loft, but it can be raised at planning stage.
Apex works along the whole Adur coastal strip, so Southwick sits between two areas we are in constantly, with Shoreham-by-Sea to the west and Portslade and the rest of Brighton and Hove to the east. Site visits are quick to arrange and the build keeps moving once it starts.
The first step is a free site visit. We measure up, assess the roof structure and head height, look at access and the party wall position, and talk you through the realistic options. From there our in-house architectural support can handle the drawings and any application. You will want to confirm the planning position for your property directly with Adur District Council, and to discuss Party Wall requirements with a surveyor or architect before the build starts.
Apex works on loft conversions across Worthing, Brighton & Hove and the wider West Sussex coast. The pages below give a closer look at
the housing, planning and conversion types we see in each area. If your town or village isn’t listed, we likely still cover it, get in
touch for a quick check.
The questions Southwick homeowners ask us most often. If yours is not answered here, send it through the contact form and we will get back to you.
It varies with the conversion type, the size and condition of the house and the consents involved. Rooflight conversions are generally quickest, with dormer, hip-to-gable, L-shape and mansard builds taking progressively longer. In Southwick the item people underestimate is not the building work but the party wall notice period, which runs before anything starts on site and applies to most terraced and semi-detached properties here. We give you an indicative programme for our part of the job at quote stage; your architect or surveyor is better placed to time the design, consent and notice phase.
In many cases no, but it depends on the property and the design. Homes inside the conservation area around The Green usually have permitted development rights restricted or removed, so a full application to Adur District Council is more likely and the external detail is scrutinised more closely. Elsewhere in Southwick a rear dormer or a rooflight conversion can often proceed under permitted development, subject to the national limits on volume, position and windows, and to any Article 4 Direction on your road. Anything that changes the front elevation, or a mansard, is far more likely to need permission. Where an application or a Lawful Development Certificate is needed our in-house architectural support can prepare and submit it, and we would always recommend confirming your own position with the council. Building Regulations apply regardless and are separate from planning.
On a terraced or semi-detached Southwick house, a loft conversion will usually involve work to or near a shared wall, which brings the Party Wall etc. Act 1996 into play. A written notice normally has to be served on the affected neighbours a set period before work begins, and if a neighbour dissents or does not reply, a party wall surveyor is appointed. That responsibility sits with you as the homeowner, not with us, though we will tell you at the first visit whether we think a notice is likely and we can point you towards a surveyor. Starting that conversation early is the single easiest way to keep a Southwick project on programme.
In most cases yes. Once the roof is opened it is kept weatherproof, and the bulk of the work happens above your existing ceiling. There will be noisy stages, particularly steel installation and cutting in the staircase, and we flag those in advance. The other thing worth planning for in Southwick is outside the house: with narrow plots and pressure on parking, the scaffold, the skip and the deliveries need arranging around permits and neighbours, and we sort that out before the first day rather than on it.
As a general guide you need roughly 2.2 to 2.3 metres from the top of the existing ceiling joists to the underside of the ridge, measured before any work, because the new floor build-up and the roof lining both take some of that away. A rooflight conversion needs the height to be there already. A dormer or a hip-to-gable can create usable height where the existing roof is short of it. It is one of the first things we measure at the free visit, and if the numbers do not work we will say so before any design fees are spent.
As a broad steer for Southwick: a rear dormer is the standard answer on a mid-terrace and on most semis, because it produces the most usable room and stays out of view from the street. An end-of-terrace or semi with a hipped side slope often suits a hip-to-gable with a rear dormer added. If there is a two-storey rear projection, an L-shape is worth looking at. Rooflights suit a generous existing ridge or a house where the roof needs to stay exactly as it is. We will recommend the right option for your property at the free site visit.
Yes. Every loft conversion has to meet the Building Regulations whether or not planning permission is needed. They cover structural stability, usually steel beams and strengthened joists, fire safety including escape routes, fire doors and alarms, staircase design and headroom, insulation, and sound insulation. That last one carries extra weight in Southwick, where most homes share at least one wall with another household and the separating construction has to perform properly once there are habitable rooms in the roof. Appointing Building Control and booking inspections is the homeowner’s responsibility, through the local authority or an approved inspector, and we build to the standards and coordinate with whoever you appoint.
