Loft conversion specialists working right across Brighton and Hove, from the tightly packed streets near the centre to the suburbs climbing toward the Downs. We design and build dormer, hip-to-gable, Velux, mansard and L-shape conversions, with in-house architectural support on every project. Contact us for a free, no-obligation quote on your Brighton loft conversion.
Thinking about a loft conversion in Brighton? Apex designs and builds them right across the city, throughout the BN1 and BN2 postcodes. Brighton is a dense, hilly city, and its housing reflects that: tightly packed terraces climbing the slopes near the centre, larger period homes on the inner suburban avenues, and later semis and estates spreading out toward the edges. Space is at a premium here, which is a large part of why so many Brighton owners look upward rather than move, but a terrace wedged into a hillside street sets different challenges from a roomier semi further out.
What is achievable varies from one Brighton home to the next, and the city’s planning picture is unusually involved. Ridge height, roof shape, party walls with close neighbours, and whether the home sits inside one of Brighton & Hove’s many conservation areas all feed into the recommendation. We handle the whole project, from design and structural drawings through any planning application to the finished build, so you are not left coordinating separate trades yourself.
As loft conversion builders working across Brighton and Hove, we take a joined-up approach from the first drawing to the finished room. Our in-house architectural support keeps design, planning and build under one roof, and we build to current Building Regulations throughout. We start with a free, no-obligation site visit and tell you straight what your roof can deliver. Contact us for a free quote on your Brighton loft conversion.
The right loft conversion for your Brighton home depends on the roof type, the amount of extra space you want, and whether you are open to altering the external roofline. Five main conversion types come up across the city, and on Brighton’s terraced hillside streets the choice is often shaped as much by the planning position and the neighbours either side as by the roof itself. We will recommend the right one for your property after the first visit.
A common choice on the terraced and semi-detached homes that fill much of Brighton. A dormer projects outward from the existing roof slope to create standing headroom and usable floor area where the roof sloped in. On homes outside a conservation area a standard rear dormer may fall under permitted development, but across large parts of Brighton that position is tightened by conservation status or an Article 4 Direction, so a rear dormer here more often needs a full planning application than it would elsewhere. The space gained will vary from home to home.
Suited to the semi-detached and end-of-terrace homes with a hipped roof, more common on Brighton’s outer suburban streets than in the terraced centre. Where the side of the roof slopes inwards rather than rising to a vertical wall, a hip-to-gable rebuilds it up to a full gable and opens up the volume a hipped roof otherwise loses. It is often paired with a rear dormer to square off the space. Exact layouts depend on the property, and on any external change the local conservation position needs checking first.
The least invasive option, and frequently the most realistic one in Brighton’s conservation areas, where changes to the roofline are looked at closely and often resisted. The existing roof profile stays as it is: we strengthen the structure, insulate, board the floor and fit rooflights for daylight. Planning permission is rarely required for a rooflight conversion, though in a conservation area the type and position of rooflights can still matter, and listed building consent applies where the property itself is listed.
The most transformative of the five conversion types, and a familiar sight on the city’s taller terraces. A mansard rebuilds the rear, or sometimes the front, roof slope to near-vertical for maximum floor area and headroom. Full planning permission is almost always required, and given how much of Brighton falls within a conservation area, the design detailing is very often scrutinised closely. It is worth confirming the position with Brighton & Hove City Council and a planning consultant before committing.
Suited to the older homes with a two-storey rear projection, the side return, which are common across Brighton’s inner terraced streets. An L-shape conversion adds a dormer to both the main roof and the rear projection, creating an L-shaped upstairs layout, and it is often the way to win a genuinely useful amount of space from a narrow city terrace. As with any external change here, the conservation and Article 4 position needs checking before the design is fixed.
Every Brighton home is different, and the best loft conversion is the one that works with the existing structure to deliver the most usable space. We design around your roof rather than from a standard template, checking ridge height, head heights at the walls, chimney breast positions and staircase landings before proposing a layout. On a narrow city terrace, where the footprint is tight and every neighbour is close, that early detail is what separates a scheme that gets consent and works from one that does not. You will leave the first visit with a clearer view of what the space could deliver.
West Sussex is our base and Brighton sits comfortably within our regular working area. We know the general planning environment across the BN1 and BN2 postcodes and, just as important in this city, how much of it is covered by conservation areas and Article 4 Directions that change what you can do without permission. You get a local team on site, careful handling of the access and parking constraints that come with terraced city streets, and a crew that respects the home they are working in.
Our team and specialist partners focus on a finish that stands up to close inspection: plumb walls, flush trims, clean plaster lines, and joinery finished to a high standard. On Brighton’s visible terraced frontages, where any external work sits in full view of the street and often within a conservation area, that outside detailing has to be right as much as the rooms inside. Work is carried out to current Building Regulations, and we coordinate with your Building Control inspector at the relevant stages. Examples of completed work are shown in the gallery below, and we are happy to walk through project details and references at the first site visit.
A typical Brighton loft conversion runs through six stages. We are involved from initial design through to the finished build via our in-house architectural support, while some legal responsibilities (Party Wall notices, listed building consent, Building Control submission) remain the homeowner’s and should be discussed directly with a surveyor, architect or the council. On the city’s terraced streets, where you often share walls on both sides, the Party Wall stage in particular is worth thinking about early.
The first step is a free visit to your Brighton home. We measure up, look at the roof structure, and check head heights and ridge clearance, then talk through what the space could realistically deliver and flag anything the local conservation position is likely to affect. There is no cost and no obligation to proceed.
If you already have drawings we will work from those. If not, our in-house architectural support can handle the design phase, including layout planning and technical drawings, so you get a joined-up approach from the start. Alongside the drawings we produce a detailed quote and a proposed build programme.
Where a planning application or Lawful Development Certificate is needed, our architectural partners can help prepare and submit it to Brighton & Hove City Council on your behalf. This step carries more weight in Brighton than in most areas, given how widespread conservation areas and Article 4 Directions are across the city. We would always recommend checking the planning position for your property directly with the council, and discussing any Party Wall requirements with a surveyor or architect before the build starts. Party Wall notices are the homeowner's legal responsibility and cannot be served by the builder.
On-site construction begins once the consents, drawings and structural calculations are in place. Timescales vary with the conversion type and the property, and we will set out an indicative programme at quote stage. The opened roof is kept weatherproof throughout, and on Brighton's narrow terraced streets, where parking and access are often limited, we plan deliveries and skips carefully to keep disruption to neighbours down.
Building Control inspections are arranged by you, either through the local authority or an approved inspector you appoint, and take place at set stages of the build. We build to the current Building Regulations throughout and coordinate with whoever you have appointed so each stage is inspected at the right time.
Once your side has signed off the final inspection, we hand the finished loft over. Keep the completion certificate and related paperwork with your property records; you will want it for any future sale.
A selection of recent loft conversion projects completed across Brighton, Hove and the wider Sussex coast, spanning a range of conversion types from rooflight schemes on conservation-area terraces to hip-to-gable builds on the outer suburbs. If you would like to see more examples of work near your property, get in touch and we will share relevant projects.
The notes below are general context for Brighton homeowners considering a loft conversion and don’t constitute legal advice. Always confirm the position for your property with Brighton & Hove City Council, and where relevant with an architect, planning consultant or party wall surveyor, before any work starts.
Planning authority. Planning across the city is run by Brighton & Hove City Council, which administers an unusually large number of conservation areas, so the single most useful step is checking whether your address falls inside one.
Conservation areas. A great deal of Brighton sits within a conservation area, and where it does, permitted development rights are usually restricted or removed and a full planning application is more likely, with external roof changes assessed closely.
Article 4 Directions. The council has also made Article 4 Directions across parts of the city that remove specific permitted development rights street by street, so it is worth confirming the exact position for your home.
Permitted development. Outside those controls, a loft conversion can often proceed under permitted development, with a Lawful Development Certificate worth obtaining for your records.
Listed buildings. Listed buildings are found throughout the older city, and where one is involved, listed building consent is separate from planning permission.
Party wall. On the city’s terraced and semi-detached homes, where you often share walls on both sides, serving any Party Wall notice is the homeowner’s legal responsibility and cannot be done by the builder.
Apex is based in Worthing and covers Brighton and Hove along with the surrounding suburbs, including Portslade, Patcham, Preston Park, Hangleton and Woodingdean. Brighton sits comfortably within our regular working area, and staying local keeps site visits easy to arrange and every project running with clear communication and minimal disruption.
The first step is a free site visit. We measure up, assess the roof structure and head height, and talk you through realistic options for the space, including what the local conservation position is likely to allow. From there our in-house architectural support can handle drawings and any planning application, and you will want to confirm the planning position for your property directly with Brighton & Hove City Council and discuss any 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.
Common questions from Brighton homeowners considering a loft conversion. If yours isn’t covered, get in touch through the contact form and we’ll get back to you with an answer.
Timescales vary with the conversion type, the size and condition of the property, and the consents involved. Simpler rooflight conversions are generally the quickest, while dormer, hip-to-gable, L-shape and mansard builds take progressively longer. In Brighton the consent phase is often the bigger variable, because so many homes sit within a conservation area or under an Article 4 Direction and need a full planning application to Brighton & Hove City Council. We will give you a realistic programme for the build itself at quote stage, and your architect or planning consultant will be best placed to estimate the design and consent phase.
It depends where in Brighton you live and on the details of the property. A great deal of the city falls within a conservation area, and the council has made Article 4 Directions across parts of it, both of which restrict or remove the permitted development rights a loft conversion would otherwise rely on, so a full planning application is more commonly needed here than in many areas. On homes outside those controls, many conversions can still proceed under permitted development, subject to the national rules on volume, position and listed-building status. Where a planning application or Lawful Development Certificate is needed, our in-house architectural support can prepare and submit it on your behalf, and we would always recommend confirming the position for your specific address directly with Brighton & Hove City Council. Building Regulations apply to every loft conversion and are separate from planning.
In most cases, yes. Once the roof is opened up it is kept weatherproof, and most of the build takes place above the existing first-floor ceiling. You should expect some noise and dust at various points, but it is usually practical to stay in the house throughout. Steel installation and the staircase cut-through are typically the most disruptive stages. On Brighton’s terraced streets, where homes sit close together and parking is tight, we plan deliveries and skips carefully and give neighbours notice of the noisier spells.
Industry research has long suggested that a well-built loft conversion can add meaningful value to a home, though the actual uplift varies with the property, the local market and the quality of the finish. In Brighton, where house prices sit among the highest on the south coast and moving up the ladder is expensive, the extra usable space an extra bedroom or bathroom brings can be worth a great deal. For many owners of the city’s tightly packed terraces, converting the loft is also the most practical way to gain a room without leaving a street they want to stay on.
As a general guide, you will typically need a floor-to-ridge height of around 2.2 to 2.3 metres for a loft conversion to be viable, measured from the top of the existing ceiling joists to the underside of the roof ridge. Where head height is tight, a dormer or a mansard can sometimes create the usable room, while a rooflight conversion generally needs the existing height to already be sufficient. Many of Brighton’s taller terraces have generous ridge heights that work well, while some lower cottages near the centre are tighter, so head height is one of the first things we check on the free site visit, and we will be honest about what is possible before any design work begins.
The right loft conversion depends on your roof shape, the amount of space you want, and whether you are open to altering the external roofline, though in Brighton the local conservation position often has as much say as the roof does. As a broad steer, the city’s taller terraces with a rear projection frequently suit an L-shape or, where consent allows, a mansard; hipped-roof semis on the outer suburbs often suit a hip-to-gable with a rear dormer; and rooflight conversions are frequently the realistic route inside conservation areas, where external changes are resisted. We will recommend the best option for your specific property, and its planning position, at the free site visit.
Yes. Every loft conversion in the UK must meet the Building Regulations, whether or not planning permission is needed. They cover structural stability (commonly steel beams and reinforced floor joists), fire safety (escape routes, fire doors and smoke alarms), staircase design and headroom, thermal insulation, and sound insulation between the new rooms and the rest of the house, which matters that bit more where you share walls with close neighbours. Building Control submission and inspections are the homeowner’s responsibility, through the local authority or an approved inspector you appoint. We build to the relevant standards throughout and coordinate with whoever you have appointed so the right stages are inspected at the right times.
