--- title: "Building Services in Tunbridge Wells | Extensions & Conversions | Spectrum" description: "Trusted Tunbridge Wells building team for extensions, conversions, renovations and new builds. Fixed quotes, single point of contact, fully insured, project-managed end to end." lang: en-GB json-ld: | [ { "@context": "https://schema.org", "@type": "Organization", "@id": "/#organization", "name": "Spectrum Electrical & Building Ltd", "url": "/", "logo": "/__l5e/assets-v1/278be0ed-e1be-458b-a1b1-a08de471118f/spectrum-icon.png", "telephone": "07480 485988", "email": "spectrum.eb@mail.com", "address": { "@type": "PostalAddress", "streetAddress": "1 Sherwood Road", "addressLocality": "Tunbridge Wells", "addressRegion": "Kent", "postalCode": "TN2 3LB", "addressCountry": "GB" }, "areaServed": [ { "@type": "City", "name": "Kent" }, { "@type": "City", "name": "Tunbridge Wells" }, { "@type": "City", "name": "Tonbridge" }, { "@type": "City", "name": "Sevenoaks" }, { "@type": "City", "name": "Crowborough" }, { "@type": "City", "name": "Brenchley" }, { "@type": "City", "name": "Mayfield" }, { "@type": "City", "name": "Paddock Wood" }, { "@type": "City", "name": "Langton Green" } ], "sameAs": [ "https://maps.app.goo.gl/7AumDfwKajqS6xSU7" ] }, { "@context": "https://schema.org", "@type": "WebSite", "@id": "/#website", "name": "Spectrum Electrical & Building Ltd", "url": "/", "inLanguage": "en-GB", "publisher": { "@id": "/#organization" } }, { "@context": "https://schema.org", "@type": "Service", "serviceType": "GeneralContractor", "name": "General Building & Conversions", "areaServed": { "@type": "City", "name": "Tunbridge Wells" }, "provider": { "@type": "LocalBusiness", "name": "Spectrum Electrical & Building Ltd", "telephone": "07480 485988", "address": { "@type": "PostalAddress", "streetAddress": "1 Sherwood Road", "addressLocality": "Tunbridge Wells", "postalCode": "TN2 3LB", "addressCountry": "GB" } }, "description": "Trusted Tunbridge Wells building team for extensions, conversions, renovations and new builds. Fixed quotes, single point of contact, fully insured, project-managed end to end." }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "How much do building works cost in Tunbridge Wells?", "acceptedAnswer": { "@type": "Answer", "text": "Costs vary by size, spec and complexity. Quotes are free. After a free on-site survey you'll receive a fixed itemised written quote, we aim for a 48-hour turnaround." } }, { "@type": "Question", "name": "How long does an extension take?", "acceptedAnswer": { "@type": "Answer", "text": "A standard single-storey rear extension is typically 10–14 weeks from groundworks to handover. Double-storey runs 14–20 weeks, loft conversions 6–10 weeks, full house renovations 4–6 months. Your written programme states every milestone." } }, { "@type": "Question", "name": "Do you handle planning and Building Control?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. We work with your architect (or recommend one) for planning drawings, file Building Regulations applications, book inspections at each stage and obtain the completion certificate. Party Wall notices are co-ordinated where required." } }, { "@type": "Question", "name": "Are you fully insured?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. £5m public liability and full employer's liability covering every Spectrum tradesman and sub-contractor on your site. Certificates supplied on request before works begin." } }, { "@type": "Question", "name": "Do you guarantee the work?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. Building Control sign-off plus a 1-year Spectrum workmanship guarantee on every element we install. Manufacturer warranties on windows, doors, roofing and fixtures are registered in your name." } }, { "@type": "Question", "name": "Can I live in the house during the build?", "acceptedAnswer": { "@type": "Answer", "text": "For extensions and loft conversions, almost always, we section off the works, protect floors and keep services live overnight. Full renovations are usually easier to vacate for the heaviest 4–6 week phase; we'll advise honestly at survey." } }, { "@type": "Question", "name": "Do you offer fixed prices or day rates?", "acceptedAnswer": { "@type": "Answer", "text": "Fixed-price contracts for every defined scope. Day rates only for genuinely undefined snagging or investigation works, agreed upfront in writing." } }, { "@type": "Question", "name": "What areas around Tunbridge Wells do you cover?", "acceptedAnswer": { "@type": "Answer", "text": "Tunbridge Wells, Tonbridge, Sevenoaks, Crowborough, Brenchley, Mayfield, Paddock Wood, Langton Green and the wider Kent and East Sussex border." } } ] }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "/" }, { "@type": "ListItem", "position": 2, "name": "Services", "item": "/services" }, { "@type": "ListItem", "position": 3, "name": "General Building & Conversions", "item": "/services/builder" } ] } ] --- Tunbridge Wells, Kent Mon–Fri 8:00–17:00 [spectrum.eb@mail.com](mailto:spectrum.eb@mail.com)[07480 485988](tel:+447480485988) [![Spectrum Electrical & Building Ltd](/__l5e/assets-v1/a7c2b1aa-2941-4064-ad5b-d00433ea5395/spectrum-logo.png)](/) [About](/about) [Building Services](/services) [Other Services](/services) [Service Areas](/service-areas) [Our Work](/our-work)[Contact](/contact) [07480 485988](tel:+447480485988)[Request Estimate](/contact) ![Spectrum builder on a residential construction site in Kent with scaffolding and brickwork](/assets/builder-C3hR937a.jpg) Building Services · Extensions · Conversions · Kent # Tunbridge Wells Building Team for Extensions, Conversions & Full Project Builds One building team managing every trade, one written quote, one realistic timeline, so your extension or conversion lands on budget, on time, and to a finish you can show off. [Request my build estimate](/contact) [07480 485988](tel:+447480485988) Fully insured to £5m · Company No. 15948972 · 5-star rated locally · Free on-site survey 1. [Home](/) 2. [Services](/services) 3. General Building & Conversions - 15+ years on the tools - Single point of contact - Fully insured to £5m - Written fixed quotes - All trades in-house Service overview ## What's involved in general building & conversions. Plain-English breakdown, so you know exactly what you're paying for and why it matters before we set foot on site. ### What it is Domestic construction managed start to finish, single and double-storey extensions, loft conversions, garage conversions, structural alterations, full house renovations and new-build projects across Tunbridge Wells, Tonbridge, Sevenoaks and the surrounding Kent villages. Every job runs to a written specification, agreed drawings and a fixed-price contract. ### Who it's for Homeowners adding space rather than moving, families opening up tired layouts for kitchen-diners, landlords bringing tired stock up to a lettable standard, and buyers tackling full renovations on period properties. ### When you need it Planning permission granted and you need a team to price the works; a structural survey has flagged movement, lintels or roof issues; you've outgrown the house but love the postcode; or a previous contractor has walked off the job and you need someone to take it over cleanly. ### Why it matters A proper building team is the difference between a co-ordinated project and nine sub-contractors blaming each other. We hold the programme, sequence the trades, protect the budget against scope creep and give you one phone number for everything from foundations to snagging. The cost of doing nothing ## What goes wrong when this is ignored. Most building jobs that go wrong don't fail on day one, they unravel quietly across weeks until the bill is double, the timeline has tripled, and nobody is in charge. ### Risks of waiting - Cutting corners on foundations or steels causes movement and cracking that costs 5–10× more to remediate later than to do correctly first time. - Uninsured trades on your site means any injury, neighbour damage or building defect lands on your household insurance, often invalidating cover. - No written programme means trades clash, materials sit in the rain, and labour invoices stack up while no progress is made. - Building Control sign-off refused at completion can stop a property sale and force expensive rework on hidden elements like cavity trays or fire-stopping. ### Common mistakes - Accepting a cheap verbal quote without a written specification, an apparent saving turns into a long variation list once works begin. - Choosing a contractor who can't show recent finished work locally, or who won't introduce you to recent clients. - Letting design and structural drawings be 'figured out on site', every guess on the trowel costs money at handover. - Skipping a Party Wall agreement when you share a boundary, neighbours can legally halt works mid-build. Our process ## How the job actually runs. Same system every time. No improvising on your floor. 1. 01 ### Free on-site survey We walk the site with you, take measurements, review your drawings and listen to how you want to use the finished space. 2. 02 ### Fixed written quote Itemised quote within 48 hours covering structure, trades, materials, programme, exclusions and stage payments, no vague 'PC sums' hiding the real number. 3. 03 ### Pre-start planning We file Building Control, co-ordinate Party Wall notices if needed, schedule trades and confirm your start date in writing. 4. 04 ### Build phase One site supervisor on the ground, weekly progress reports, agreed clean-down at the end of every day and a single WhatsApp thread for any decisions. 5. 05 ### Sign-off & guarantee Building Control completion certificate, full snagging walk, all warranties and a 1-year Spectrum workmanship guarantee handed over in writing. What you get ## The outcomes that matter. ### One team, one invoice No chasing nine trades for VAT receipts or arguing about whose mistake the bathroom leak was. ### Fixed price, not 'estimate' Your contract price is what you pay. Variations are quoted and signed before any extra work begins. ### Realistic programme We tell you the truth on timelines, including weather, delivery windows and trade availability, no fictional Friday handover dates. ### Quality controlled in-house Spectrum trades do the bulk of the work; specialist sub-contractors are vetted, insured and managed by us, not by you. ### Tidy, respectful site Dust sheets, daily clean-down, protected floors and neighbours kept in the loop. Your home stays liveable. ### Backed by guarantees Building Control sign-off, manufacturer warranties on every product, and a 1-year workmanship guarantee on every joint, junction and finish. In depth ## Everything worth knowing before you book. The details a salesperson skips. Skim it, or read every word, both are useful. Questions on this? Talk to a Spectrum tradesman direct. [07480 485988](tel:+447480485988) ### Single & double-storey extensions across Tunbridge Wells Most Tunbridge Wells extensions are rear or side returns adding a kitchen-diner, a utility, or a master bedroom and en-suite above. Our team handles the full sequence: groundworks and underpinning where needed, steel beams sized by a structural engineer, blockwork to match existing courses, roof tying-in to keep the elevation reading cleanly, render or brick to match, plus all internal plastering, second-fix joinery and decoration. Local soils across Kent vary from sandy ground to heavy clay, so we trial-pit every site before quoting foundations, no guesswork, no nasty variations once the digger arrives. ### Full renovations of period properties Tunbridge Wells has a high proportion of Victorian, Edwardian and 1930s stock, beautiful houses with quirks. We re-plan tight kitchens, knock through into hallways with the right steels and pad stones, dry out damp solid walls properly, upgrade lath-and-plaster ceilings, install acoustic insulation between floors and bring electrics and plumbing up to current regs. Period detail (cornicing, picture rails, original tiles) is protected, restored and reinstated rather than ripped out. ### Loft and garage conversions Loft conversions add a bedroom, en-suite or home office without losing garden. We handle dormer and hip-to-gable conversions, fire-rated escape routes, Velux installations, structural ridge beams and full Building Control sign-off. Garage conversions are quicker and cheaper per square metre, usually 4–6 weeks for a habitable room, including insulating cavity walls, raising the slab, fitting a new external door or window opening and tying heating and electrics into the existing house. ### Project management and trade co-ordination On larger builds our team runs the full programme so you don't have to. That means weekly trade scheduling, materials ordered in line with the programme, a single decision log so every choice (tiles, taps, paint colours) is captured and dated, and one site supervisor accountable for quality. You get a fortnightly cost report so there are no end-of-month invoice shocks. ### Residential vs small-commercial work We mostly work residential, but we also handle small-commercial fit-outs and refurbs across Kent, retail units, offices and HMOs. Commercial work runs on the same fixed-price contract model, with attention to fire compartmentation, accessibility (Part M), and out-of-hours working where needed to keep your trading days unaffected. Frequently asked ## Straight answers, no fluff. Can't see your question? Call [07480 485988](tel:+447480485988). How much do building works cost in Tunbridge Wells? Costs vary by size, spec and complexity. Quotes are free. After a free on-site survey you'll receive a fixed itemised written quote, we aim for a 48-hour turnaround. How long does an extension take? Do you handle planning and Building Control? Are you fully insured? Do you guarantee the work? Can I live in the house during the build? Do you offer fixed prices or day rates? What areas around Tunbridge Wells do you cover? Ready when you are ## Book your general building & conversions job today. Fixed written quote. Insured tradesmen. No upsell, no pressure. [Request my build estimate](/contact) [07480 485988](tel:+447480485988) Fully insured to £5m Same-week starts 5-star rated locally Related services ## Other trades we cover. [View all services →](/services) [ ### Extensions (Single & Double Storey) Learn more ](/services/extensions)[ ### Loft Conversions Learn more ](/services/loft-conversions)[ ### Refurbishments Learn more ](/services/refurbishments)[ ### New Builds Learn more ](/services/new-builds) ![Spectrum Electrical & Building Ltd](/__l5e/assets-v1/a7c2b1aa-2941-4064-ad5b-d00433ea5395/spectrum-logo.png) Trusted residential & commercial electrical and building experts in Tunbridge Wells, Kent. Over 20 years of skilled trade across the South East. Same-day service guaranteed. [Follow on Instagram ](https://www.instagram.com/spectrum_elec_and_build) ### Services - [General Building & Conversions](/services/builder) - [Extensions (Single & Double Storey)](/services/extensions) - [Loft Conversions](/services/loft-conversions) - [Refurbishments](/services/refurbishments) - [New Builds](/services/new-builds) - [Shop Fitting & Commercial Fit-Outs](/services/shop-fitting) - [Electrical Installations & Rewiring](/services/electrician) - [EV Charger Installation](/services/ev-chargers) - [Solar Panel Installation](/services/solar) - [Battery Storage Systems](/services/battery-storage) - [Plumbing](/services/plumber) - [Landscaping](/services/landscaping) ### Company - [About](/about) - [Service Areas](/service-areas) - [Reviews](/reviews) - [Contact](/contact) ### Contact - [07480 485988 ](tel:+447480485988) - [spectrum.eb@mail.com](mailto:spectrum.eb@mail.com) - 1 Sherwood Road Tunbridge Wells, Kent TN2 3LB - Mon–Fri 8:00–17:00 · Sat–Sun closed © 2026 Spectrum Electrical & Building Ltd. All rights reserved. [Privacy Policy](/privacy-policy)[Terms & Conditions](/terms-conditions)· Company No. 15948972 [Call now](tel:+447480485988)[Request Estimate](/contact)