Apex builds loft conversions in Lyminster and across the BN17 villages north of Littlehampton. Dormers, hip-to-gables, rooflight schemes, mansards and L-shapes, designed and constructed by the same team, with architectural partners handling drawings and any application. Book a free survey and we will tell you what your roof can give you.
Thinking about a loft conversion in Lyminster? Apex designs and builds them here and throughout BN17, a short run inland from our Worthing base. One thing about this village shapes almost every decision made about extending a house in it, and it is worth putting first. Lyminster stands on a narrow band of higher, drier ground, and the levels immediately to the north and to the south of it fall within the highest flood zone on the national map.
That has a direct bearing on how you add a bedroom. Building outward at ground level in a place like this means a new footprint, new foundations, new drainage run across low ground and a fresh set of questions about resilience and insurance at exactly the level that floods. A loft conversion raises none of them. It puts the extra room above everything you already have, adds nothing to the footprint and leaves the ground floor untouched. In a village laid out on a strip of dry land, going upwards is not the consolation option. It is usually the sensible one.
The flood map does not make the loft itself harder either, which surprises people. Flood zones do not remove permitted development rights, so for most Lyminster addresses a dormer is assessed under the ordinary national rules on volume, position and materials, exactly as it would be anywhere in the district. The exception is the old village, which is a conservation area, and there a roof extension needs a full application to Arun District Council instead. We tell you which applies at the first visit. Our trusted architectural partners can then prepare drawings and submit any application, and we build to current Building Regulations throughout. Contact us for a free quote on your Lyminster loft conversion.
Which of the five fits comes down to the shape and the height of the roof you already have, plus, for addresses inside the old village, what the conservation area will accept above the eaves. The village mixes detached and semi-detached housing of quite different roof forms, so there is no single recommendation that covers Lyminster. We measure, look at how the roof is framed and then narrow the list to the one or two worth drawing.
A dormer pushes out from the existing slope to create standing headroom and a proper floor where the roof previously closed in. It produces the most usable room for the money, and for the majority of Lyminster addresses it falls under permitted development, subject to the national limits on volume, position and materials. Inside the conservation area over the old village it becomes a full planning application instead. The flood zones on the surrounding levels have no bearing on either route.
This one applies where the side of your roof slopes inward instead of finishing at a vertical wall. Rebuilding that hip up to a full gable recovers the volume the slope takes away and gives the new floor its width back, and it is normally paired with a dormer at the rear to square off the result. A number of the detached houses around Lyminster are hipped, and where they are, this is often what separates a cramped room from a proper one.
The gentlest of the five. Nothing about the roof shape changes: we strengthen the structure, insulate, lay a new floor and set rooflights into the slope you already have. It suits a Lyminster property that already has generous height under the ridge and an owner who wants the shortest possible time with builders in the house. It is also the least sensitive option for anyone inside the conservation area, since work kept within the existing slope is treated differently from an extension to the roof.
The biggest intervention of the five, rebuilding a slope to something close to vertical for maximum floor and headroom. It needs full planning permission wherever it is built, with no exceptions. On the housing around Lyminster it is rarely what we put forward, because a dormer normally delivers what the family actually needs at lower cost and with less upheaval. If your property genuinely warrants the extra volume we will look at it properly, but you will hear the trade-off from us before any drawings are commissioned.
Where a house has a rear wing rising to two storeys, the loft above it can be brought into the same scheme. A dormer on each roof, joined at the corner, produces an L-shaped floor with enough area to give a shower room or a small home office its own space instead of screening a corner off the bedroom. Not many Lyminster houses have this footprint, but the ones that do get more out of it than any other option.
We start from the house in front of us rather than from a standard drawing. The survey covers ridge height, the height where the roof meets the wall, how the roof is framed, where the chimney runs and where a new staircase can arrive without wrecking the landing below. In Lyminster we add the flood position to that, not because it affects the loft but because it usually explains why the loft is the right piece of work rather than a ground floor extension. You come away from the visit knowing what the roof will yield and what the route to it looks like.
Apex works out of Worthing and covers this part of Arun week in, week out, so the villages north of Littlehampton are familiar ground rather than a special trip. We know how Arun District Council treats roof extensions, we know roughly where the conservation boundary runs through the old village, and we know which addresses sit low enough for ground conditions to matter during setting out. The team that surveys your roof is the team that builds it, and you deal with us directly the whole way through.
The measure of a loft conversion is what it looks like in five years, not on handover day. So the parts you use daily get the same care as the parts nobody sees: square reveals, flat ceilings, tidy junctions where new work meets the old roof, and doors that still close properly after a winter. Insulation and airtightness are detailed at drawing stage rather than improvised at the end. Every job is built to current Building Regulations and we work alongside your Building Control inspector at each stage that needs signing off. There are recent projects in the gallery below and we can put you in touch with past customers.
A Lyminster conversion moves through six stages. The first two settle what is possible and what it costs, the third deals with consent, and the last three are the build and its sign-off. Apex carries out the survey and the construction and coordinates the rest; drawings and any planning submission go through our trusted architectural partners. Three things remain your legal responsibility whoever builds the job: Party Wall notices, listed building consent if the property is listed, and the Building Control submission.
Somebody comes to the house, gets up into the roof and takes the measurements that matter: how it is framed, what the head height is and how much clearance sits under the ridge. For a Lyminster address we also confirm whether it falls inside the old village conservation area, because that sets the planning route. Free, and nothing follows from it unless you want it to.
Bring us drawings and we will price them as they stand. Without them, our trusted architectural partners can produce the layout and the technical detail, which keeps the design honest about how it will actually be built. You get a written quote broken down by element, along with an indicative programme.
Lyminster applications go to Arun District Council. For most addresses in the village a loft conversion sits inside permitted development, subject to the national limits, and no application is needed. Inside the conservation area over the old village, a roof extension needs full planning permission. Flood zone status alters neither position. Our architectural partners can prepare and submit whatever is required, we would always suggest confirming your own case with the council, and Party Wall notices remain your responsibility rather than something we can serve on your behalf.
Work starts once the drawings, any consent and the structural calculations are all in hand. How long it takes depends on the conversion and on the property, and the indicative programme in your quote will say. The roof stays weatherproof from the moment it is opened. Scaffold, deliveries and skip positions are agreed with you before the first van arrives rather than settled on the morning.
Building Control is your appointment to make, not ours. Most people use the council's own service, though an approved inspector is equally valid and sometimes quicker. Either way it runs on a separate track from planning, and it applies whether or not your conversion needed an application. We build to the current Regulations and hold the programme so that nothing gets boarded over before it has been seen.
When the final inspection is signed off, the room is handed over and the space is yours. File the completion certificate and the approved drawings with the deeds. Those are the documents a buyer's solicitor asks for, and having them ready keeps a future sale moving.
Work finished in and around Lyminster, across the Arun valley villages and down onto the coast, covering everything from modest rooflight schemes to full hip-to-gable and dormer builds. If you would like to see a conversion on a house like yours, ask and we will send the nearest comparable job over.
Background for anyone in Lyminster weighing up a loft conversion. Context rather than legal advice, so check your own address with Arun District Council before committing.
Planning authority. Arun District Council handles everything here. The National Park boundary lies a couple of miles north, so no Park rules apply.
Conservation area. One covers the old village. It is a narrow band, not a parish-wide designation, so most Lyminster addresses fall outside it.
Permitted development. Beyond the designated band, national rights cover a good proportion of conversions with no application at all. Within it, adding to a roof needs consent. Nothing else erodes those rights locally: the district has no Article 4 Directions.
Flood risk. The levels north and south of the village sit in the highest flood zone, which bears on ground works, drainage and insurance. It is one reason a loft is often the better way to add space here, and it has no effect on the loft’s planning route.
Listed properties and party wall. The old village holds a number of listed buildings, where consent runs alongside planning on its own track. And where a house adjoins a neighbour, the party wall notice is yours to serve, not your builder’s.
Apex covers this whole corner of Arun from Worthing, and Lyminster sits comfortably inside the patch. Just south, loft conversions in Littlehampton deals with a much larger town and its harbour end, while the Wick page covers the neighbourhood immediately below the village. North west up the road, Arundel is split between two planning authorities, and to the east we also cover Poling and Angmering.
It all starts with a free site visit. We measure up, look at how the roof is built, work out where your address sits relative to the conservation boundary and give you a straight answer on what is achievable and what it involves. If you want to proceed, our trusted architectural partners pick up the drawings and any submission. Confirm your own position with Arun District Council before anything is booked in.
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.
Below are the things Lyminster homeowners raise most often at quoting stage. Anything we have missed, drop it in the contact form and you will get a straight answer back.
It depends on the type and on the house. A rooflight scheme is the quick end, a mansard the slow one, and a dormer sits between them. For most Lyminster addresses the build is the whole timeline, because no planning application is needed. If the property falls inside the conservation area over the old village, a decision period gets added at the front before anything starts on site. We establish which applies at the free visit and give you a programme covering both parts rather than just the construction.
Usually not. Most of the village sits outside the conservation area, which means a loft conversion is assessed against the national permitted development rules on volume, position and materials, and a great many go ahead without an application. Arun District Council holds no Article 4 Directions, so there is no local restriction quietly removing those rights either. Being in or near a flood zone makes no difference to this: flood mapping does not affect permitted development. What does change the answer is an address inside the conservation area over the old village, where a roof extension needs full permission, and a listed property, where listed building consent applies regardless.
Nearly always, yes. The roof is kept weatherproof from the point it is opened and most of the work happens above your existing ceilings. There are a few genuinely noisy days, chiefly when the steels go in and when the stair opening is cut, and we give you notice before each of them. The rest of the time the disruption is mainly the landing and the coming and going, which is why we agree access and storage arrangements with you before work starts rather than after.
Loft conversions are consistently among the better returning home improvements, though what any individual property gains depends on the house, the local market and the standard of the work. In Lyminster there is a second argument that often matters more. Houses here sit on a tight band of ground with limited scope to build outward, so a well-built extra bedroom in the roof answers a need that a ground floor extension cannot always answer at all. Keeping the paperwork in order, whether that is a planning decision or the Building Control completion certificate, removes a question that can otherwise slow a sale down later.
As a working rule you want somewhere around two and a quarter metres from the top of the existing ceiling joists to the underside of the ridge, since the new floor build-up and the insulation both take a share of it before anyone stands in the room. If the roof falls short of that, a dormer creates the height rather than relying on it, whereas a rooflight conversion depends on the height already being there. We take the measurement on the free visit and we take it in more than one place, because a ridge figure on its own tells you very little about how much of the floor will actually be usable.
For most Lyminster houses a rear dormer is the starting point, because it produces real floor area and, outside the conservation area, will usually sit inside permitted development. Where the roof slopes in at the side, adding a hip-to-gable first widens the space considerably before the dormer goes on. A rooflight conversion is the answer where the height is already there and you want the least disruption possible, and an L-shape suits the smaller number of houses with a two-storey rear wing. A mansard is seldom the right call here. We confirm the recommendation once we have been up in the roof.
Yes, without exception, and it runs separately from planning. It is worth being clear on this in Lyminster, because a conversion outside the conservation area may need no planning application at all, which sometimes gets heard as needing no approval at all. The Regulations still apply in full. They deal with structural stability, usually steel beams and strengthened joists; with fire safety, meaning a protected route out, fire doors and linked alarms; with the stair and the headroom above it; with insulation; and with sound between the new room and the ones underneath. The submission and the inspection bookings are yours to make, through the council’s building control service or an approved inspector. We build to the standard and work with whichever you choose.
