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 - Service Areas - Cardiff South Wales · Cardiff · 30+ Years Combined Experience # Builders In Cardiff.Extensions, Renovations,Silicone Render — Built Properly. From Pontcanna and Roath terraces to Cyncoed semis and Pontprennau new-builds — one team handling extensions, full renovations, bricklaying and silicone render across Cardiff. Written quote typically within 48 hours. Request Free Estimate 07576 546805 Cardiff site surveys booked this week · Written quotes typically within 48 hours Covering Cardiff Cardiff jobs surveyed within 48 hours Fixed Written Quote Public Liability Insured · CO 15585929 Local Relevance · Cardiff ## A Cardiff Builder,Not A Builder Who Visits Cardiff. ### Why We Work In Cardiff Cardiff is a regular working area for us — Pontypridd to Cardiff city centre is under 25 minutes up the A470, and most of the Cardiff suburbs are inside 30. We've worked across the city's full property mix: Victorian terraces in Roath and Cathays, the bigger Pontcanna and Llandaff stock, post-war semis in Whitchurch and Rhiwbina, and the newer estates around Pontprennau, St Mellons and Cardiff Bay. ### Cardiff Property Types We Know Cardiff's housing splits into a few distinct types and each demands different detailing. The Pontcanna / Roath / Cathays Victorian bay-fronted terraces typically need sympathetic extensions over the original outrigger, often with retained character features. The Llandaff and Cyncoed detached and semi-detached stock takes larger wrap-around and two-storey extensions. The Cardiff Bay and Pontprennau new-build estates run on modern cavity construction with their own quirks around insulation continuity and steel sizing. ### Common Briefs In Cardiff The Cardiff brief we price most often is a kitchen-diner extension across the rear of a terrace, with bi-fold or sliding doors opening to the garden, plus a loft conversion or full first-floor reconfiguration. Silicone render systems on the Whitchurch and Heath semis are another regular call — we've replaced a lot of tired pebbledash across the northern suburbs. ### Driving Time To Cardiff Pontypridd to Cardiff city centre is around 20–25 minutes via the A470 outside rush hour. We schedule Cardiff surveys early morning or late afternoon to dodge the worst of it, which means we can fit Cardiff visits around the same days we're booked in Pontypridd or Caerphilly. Services In Cardiff ## What We BuildIn Cardiff. All Services 01 ### Extensions & New Builds Single-storey, two-storey, wrap-around extensions and ground-up new builds across Pontypridd, Cardiff and the South Wales valleys. Read Service Brief 02 ### Whole-House Refurbishments Top-to-bottom refurbishments for whole properties across Pontypridd, Cardiff and South Wales. Plaster off, floors up, rewire, replumb, reinsulate, replaster, redecorate, kitchen and bathrooms in. One team, one written programme. Read Service Brief 03 ### Plastering Internal skim, re-skim and full replastering across Pontypridd, Cardiff and South Wales. Read Service Brief 04 ### Silicone Render Full silicone and silicone-silicate render systems across Pontypridd, Cardiff and South Wales. Read Service Brief 05 ### Loft & Attic Conversions Full loft and attic conversions across Pontypridd, Cardiff and South Wales. Read Service Brief 06 ### Media Walls Bespoke media wall builds with recessed TV mounting, integrated electric fire, hidden cabling and the finish of your choice. Read Service Brief 07 ### Bricklaying Time-served bricklaying across Pontypridd, Cardiff and the South Wales valleys. Read Service Brief 08 ### End-to-End Builds Single accountable team handling every trade. Read Service Brief Why Choose Us In Cardiff ## Trust BuiltOn The Ground. 25 min From our Pontypridd yard 48 hrs Written quote turnaround 30+ yrs Combined experience across South Wales CF15-CF24 Postcodes worked weekly What's Specific To Cardiff ## Local Problems,Local Answers. Property type, climate, building age and infrastructure all behave differently in Cardiff. Generic builders don't account for it. We do. ### Tight Side Returns On Terraces Pontcanna, Roath and Cathays terraces typically have very narrow side returns — getting a digger in for foundation work is the first hurdle on every extension here. We plan access early and use mini-excavators where width is critical. ### Party Wall Agreements Most Cardiff extension work touches a party wall. We coordinate with appointed party wall surveyors and programme our work around the agreed access conditions — saves the dispute that derails so many city extensions. ### Heritage Bay Window Detail The original Cardiff Victorian bay windows are part of what makes the houses worth what they are. We retain, repair and match rather than rip out, and we work in lime mortars where the original detail demands it. ### Render Failure On 60s–80s Stock Whitchurch, Heath, Rhiwbina and Llanishen have a lot of post-war semis with sand-and-cement render that's cracking and blowing. A silicone render system over a sound, prepped substrate solves it for the next 25 years without the constant repainting cycle. ### Coastal-Influenced Damp Cardiff's lower elevation and proximity to the Bristol Channel mean wind-driven rain is harsher here than further up the valleys. Detailing around copings, sills and weatherings has to be tight or you'll see staining within a year. How It Works ## First CallTo Final Sign-Off. 01 ### Enquiry Tell us the brief by phone, email or form. 02 ### On-Site Survey We come out, measure up and listen properly. 03 ### Written Quote Itemised quote with a clear programme — typically within 48 hours of the survey. 04 ### Build & Sign-Off On site daily, tidy at end of day, signed off when you're happy. Cardiff Questions ## StraightAnswers. Cost, response time, coverage, emergency availability — the Cardiff questions everyone asks, answered before you call. Ask Yours ### Do you cover all Cardiff postcodes? +Yes — CF1 through CF24 (city and inner suburbs) plus CF14, CF23 and the outer northern and eastern suburbs. Anywhere within Cardiff itself we work as a normal travel area. ### How long does it take you to reach a Cardiff job from Pontypridd? +20–25 minutes outside peak traffic via the A470. We schedule Cardiff surveys around traffic windows so we're not wasting your time or ours sitting in queues. ### Are you experienced with Cardiff Victorian terraces? +Yes — Pontcanna, Roath, Cathays, Canton, Riverside. We've done rear extensions, loft conversions, full house renovations and silicone render across the city's period stock. ### Do you handle Cardiff Council building control? +Yes — we book and host inspections at every required stage and hand you the completion paperwork at sign-off. Standard part of every extension or structural job. ### Can you do work in Cardiff Bay or the newer estates? +Yes — modern cavity-construction extensions, loft conversions, internal reconfigurations and media walls. The newer Bay and Pontprennau properties have their own detailing requirements and we're set up for them. ### Do I need planning permission for an extension in Cardiff? +Many single-storey rear extensions fall under permitted development, but conservation areas and listed properties almost always need consent. We'll tell you on the first visit which route applies. ### How much does a single-storey rear extension cost in Cardiff? +Cost depends on size, finish and ground conditions. We give itemised fixed quotes after a site visit so you can see exactly what each element costs. No vague day rates. ### Can you take on full house renovations in Cardiff? +Yes — full strip, rewire, replumb, insulation, plaster, kitchen, bathrooms, decoration. One team end to end. Particularly suited to recently-bought properties before you move in. ### Do you work in Cardiff conservation areas? +Yes — and we work to the materials and methods the conservation officer requires. Lime mortars, matched stone and brick, breathable finishes. Nearby Service Areas ## We Also Work In… All Service Areas Builders In Pontypridd Builders In Caerphilly Builders In Newport Builders In Bridgend Next Step · Cardiff ## Cardiff Job? Get A Local Builder Who Travels. Free site survey across Cardiff (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 30+ Years Pontypridd-Based 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