Pontypridd, South Walesinfo@lewzpropertydevelopment.co.uk Mon–Sat 7:00 – 18:00Company No. 15585929 About Services Service Areas Our Work Reviews Contact 07576 546805Request Estimate - Home - Services - Loft & Attic Conversions Loft & Attic Conversions · Pontypridd & South Wales # Full Loft AndAttic Conversions —Usable Space, Properly Built. Full loft and attic conversions across Pontypridd, Cardiff and South Wales — structural ridge / steels, fire-rated stair, insulation, plaster, en-suite and decoration by one accountable team. Building control coordinated, paperwork in the handover. Request Free Estimate 07576 546805 30+ Years Combined Trade Experience · Fixed Written Quotes · Same-Week Surveys Building-regs loft conversions Structural ridge & steel design En-suite plumbing & UFH option Fully insured — £1m PL · £10m EL Service Overview ## Loft & Attic Conversions —The Brief, In Plain English. ### What It Is A loft or attic conversion transforms unused roof space into a habitable room — bedroom, en-suite, office or playroom — built to current building regs. Rooflight, dormer, hip-to-gable and mansard formats covered, depending on the roof type, head height and planning route. ### Who It's For Families needing extra bedroom or office space without moving house; landlords adding a bedroom to push a 3-bed into 4-bed rental value; renovators rolling a loft into a wider scheme; anyone looking to add usable square footage without losing garden to an extension. ### When You Need It Once a structural assessment has confirmed feasibility (head height, roof spread, stair location) and permitted-development or planning route is clear. Loft work runs largely indoors so weather is less of a constraint than groundworks. ### Why It Matters Lofts fail at the structural and regs steps. A loft converted by a carpenter with no structural engineer involved ends up with a stair that fails building control. Insulation skimped, fire stopping missed, smoke detection not upgraded — and the house won't sign off. One team that owns structure, services and finishes avoids that. What Happens If You Wait ## The Cost OfDoing Nothing. Loft conversions are high-cost work where the boring regs decide whether the house ever sells again. ### Risks Of Ignoring It - →Loft conversion stair failing fire regs — building control refusal, unsellable house. - →Roof structure altered without structural sign-off — bowing ridge, cracked ceilings below. - →Insulation skimped in loft conversion — freezing in winter, baking in summer. - →Smoke detection upgrades missed — fails sign-off, insurance void. - →Fire stopping at floor / wall junctions missed — fails building control inspection. ### Common Mistakes Customers Make - ×Buying a loft stair off the shelf without checking pitch and headroom. - ×Letting a flooring company 'do the loft boarding' to save money. - ×Forgetting smoke detection upgrades required when converting a loft. - ×Skipping the structural engineer to save £600 — costs £6k to retrofit. Our Process ## First Call ToFinal Sign-Off. 01 ### Design & Spec Scope the loft against head height, structural feasibility and stair location. Confirm planning route — permitted development or planning consent. 02 ### Fixed Quote & Programme Itemised written quote with build-up, materials, structural design, electrics, finishes — and a programme with dated milestones. 03 ### Structural & First Fix Structural ridge / steels installed, joist upgrades, stair install, first-fix electrics and plumbing, insulation, fire stopping. 04 ### Plaster & Second Fix Full plaster to walls and sloping ceilings, en-suite tank and tile, second-fix electrics and plumbing, doors, skirting, joinery. 05 ### Sign-Off Decoration, snag walk, building control sign-off and certificate, smoke alarm interlink certified — paperwork pack handed over. Why It's Worth It ## What YouActually Get. ### Passes Building Control First Time Building regs designed in from drawing — stair pitch, fire doors, smoke detection, insulation, escape routes. Pass first inspection. ### Structural Engineer Coordinated Steel and ridge design by an engineer (yours or one we recommend), checked on site before steel orders go in. ### Insulation Done Properly Continuous insulation to current Part L, no cold bridging at junctions, breathable detailing at the rafters — warm in winter, cool in summer. ### En-Suite If You Want It Pumped soil system where gravity won't reach, full tanking under wet area, compact basin / WC / shower laid out around head height. ### Joinery, Stairs & Storage Bespoke loft stairs, integrated eaves storage, built-in wardrobes in sloping spaces — joinery done in-house, not bought in flat-pack. In Detail ## Loft & Attic Conversions —Every Variation Covered. Materials, methods and the situations each variation applies to — so you know what you're buying before you buy it. Working across Pontypridd · Rhondda · Ynysybwl & Abercynon · Talbot Green · Aberdare · Merthyr Tydfil · Caerphilly Full Service Area Map ### Rooflight Conversions Where existing head height allows — a rooflight conversion leaves the roof structure largely intact and uses Velux-style windows. Fastest and cheapest format, suitable when the existing loft already has enough headroom over most of the floor. ### Dormer Conversions Dormer added to the rear (or front, with planning) to extend headroom and floor area. The most common format for terraced and semi-detached houses where the existing loft is too low. Permitted development in many cases. ### Hip-To-Gable Conversions Hipped roof end rebuilt as a vertical gable wall, opening up significantly more loft volume. Common on semi-detached and end-terrace properties. Usually combined with a rear dormer for maximum gain. ### Mansard Conversions Full re-roofing to create a near-vertical front and rear roof slope — adds the most loft volume of any format, but the most invasive and almost always needs planning. Suited to urban terraces in conservation contexts where dormer designs don't suit. ### Loft En-Suites & Bedrooms Pumped soil systems where gravity won't reach, full tanking under wet areas, compact basin / WC / shower layouts designed around limited head height. Bedroom layout designed around the stair, eaves storage and any chimney breasts that stay. Questions ## StraightAnswers. Cost, timeline, guarantees, lifespan, emergency availability — the questions everyone asks, answered before you call. Ask Yours ### Do I need planning permission for a loft conversion? +Many fall under permitted development, but dormer size, frontage and certain property types do need planning. We'll confirm on the first site visit. ### How long does a loft conversion take? +A standard rooflight conversion runs around 6–8 weeks. A dormer or hip-to-gable typically 10–14 weeks. En-suite adds time. ### Will a loft conversion add value to my house? +A properly executed loft conversion with building regs sign-off typically adds significant value and converts a 3-bed to a 4-bed for sale purposes. Local market conditions vary — talk to your agent. ### Do you handle the structural calcs and building control? +We coordinate the structural engineer's drawings (yours or one we recommend) and book the building control inspections at each stage. Certificates handed over on completion. ### How much does a loft conversion cost in South Wales? +Cost depends on format (rooflight, dormer, hip-to-gable, mansard), en-suite and finish. We give itemised fixed written quotes after a site visit so you can see the cost of each element. ### How much head height do I need to convert my loft? +Building regs typically need 2.0m or more under the ridge at the highest point. Below that, you're looking at dormer or mansard to gain headroom. We measure on the first visit. ### Will I need to upgrade my smoke alarms? +Yes — converting a loft triggers an upgrade requirement for interlinked mains-powered smoke detection through the protected escape route. We install and certify as part of the work. ### Can you add a loft en-suite? +Yes — pumped soil systems where needed, full tanking under wet areas, compact layouts designed around the head height. Specify at quote stage so we set the floor and stud-out correctly. Next Step ## Loft Sitting Empty? Build It Up. Free site survey within our coverage area, written quote typically within 48 hours, no obligation. 30+ years' combined trade experience across the team, public liability insured, Pontypridd-based. Request Free Estimate 07576 546805 Public Liability Insured Company No. 15585929 30+ Years Combined Experience Related Services Media Walls Extensions & New Builds Whole-House Refurbishments Independent, owner-led local builders with 30+ years' combined trade experience across the team. Extensions, full renovations and ground-up builds across Pontypridd, Cardiff and the wider South Wales region. 07576 54680507581 312279info@lewzpropertydevelopment.co.ukPontypridd, South Wales ### EXPLORE - About - Services - Service Areas - Our Work - Reviews - Contact ### SERVICES - Bricklaying - Bathroom Renovations - Kitchen Renovations - Whole-House Refurbishments - Extensions & New Builds - Plastering ### SERVICE AREAS - Builders in Pontypridd - Builders in Rhondda - Builders in Ynysybwl & Abercynon - Builders in Talbot Green - Builders in Aberdare - Builders in Merthyr Tydfil - Builders in Caerphilly - Builders in Cardiff - Builders in Newport - Builders in Bridgend - Builders in Barry - Builders in Bristol © 2026 LEWZ Property Development Ltd. Company No. 15585929. All rights reserved. Privacy PolicyTerms & ConditionsCookie PolicyMon–Sat 7:00 – 18:00 Call NowGet Estimate