Loft conversions are usually the highest-ROI project you can run on a Medway home — typical uplift in resale value is 15–20% on a three-bed property. RCB Design & Build delivers loft conversion projects right across Medway (ME1) from our Dartford base — typically on site within 48 hours of enquiry, with a fixed written quotation in 5 working days. Our typical loft conversion project in Medway costs between £52,000 and £105,000 in 2026, with most Victorian terraces and inter-war semis landing around £78,500. We are FMB, TrustMark, Checkatrade and TrustATrader accredited and operate as a Principal Contractor under CDM 2015.
Mixed older-stock refurbs and 1930s semi extensions. Working out of Medway Council's area, we know the planners, the local building inspectors, and the named conservation officers — that personal relationship cuts weeks off the consenting timeline. Our typical Medway project is on Victorian terraces within easy reach of Rochester Cathedral or Chatham Historic Dockyard, and we work with a small panel of trusted Kent-area subcontractors we have used for years.
Our written quotation for a Medway loft conversion includes structural steels, fire-rated stair, dormer or hip-to-gable carpentry, insulation to Part L (typically 100mm PIR between rafters and 50mm under), Velux or dormer glazing, first-fix electrics and plumbing, plasterboard and skim, and balustrade. The new staircase is typically the biggest design constraint. Our written quotation covers labour, first-fix materials, project management, scaffolding, skips, Building Control fees and statutory inspections. Second-fix materials (kitchens, bathrooms, flooring, tiles, paint, sanitaryware) are supplied by the client as a deliberate cost-control measure — this typically saves homeowners £6,280–£11,775 in trade markup. We exclude planning fees, party-wall surveyor fees and structural engineer drawings, which we coordinate at cost.
Rochester and Chatham conservation areas are tightly controlled. Suburban Medway is generally PD-friendly. Mansard, L-shaped dormer, hip-to-gable and Velux-only conversions each have their own structural and planning profile — the right option depends on roof shape and head height. Note that Medway has multiple conservation areas — design must match prevailing materials, roof shape and fenestration. Party Wall Awards are typically needed for any excavation within 3 metres of a shared wall — we coordinate the surveyor and serve notices. Building Control is lodged at the start, with inspections at foundation, damp-course, pre-plaster and completion stages.
Loft conversions run on a tight critical path: 1 week for surveys and steel design, 4–6 weeks for planning and Building Control submission, 8–12 weeks on site. We strip the roof from inside where possible to keep the house weathertight. We hold a weekly call with the client throughout, send a written progress report with photos every Friday, and the lead PM is always reachable on WhatsApp. From ME1 postcodes we can have someone on site within 48 hours of a phone call.
Every project we deliver in Medway is backed by a 12-month workmanship guarantee. Where we install manufacturer-warranted systems (roofing membranes, windows, MVHR), the manufacturer warranty (typically 10–25 years) runs alongside. As an FMB member we can also arrange an FMB-backed 2-year insurance warranty on qualifying Medway schemes — worth considering for any project above £50,000.
| Project size | From | To |
|---|---|---|
| Velux-only conversion (≤20 m²) | £52,000 | £62,000 |
| Rear dormer (20–30 m²) | £57,000 | £73,000 |
| L-shaped dormer (30–40 m²) | £68,000 | £88,000 |
| Mansard / hip-to-gable (40 m²+) | £78,000 | £104,000 |
Indicative Medway (ME1) ranges for 2026. A site visit firms the figure to +/-5%.
Typical Medway pricing ranges from £52,000 to £105,000 depending on size, finish and site complexity. Medway typically sits below central-London rates — useful for budget discipline on larger schemes. A free site visit firms the number up to ±5%.
Allow 6–12 weeks of design, planning and procurement before work starts, then a project-dependent build phase. Loft conversions run on a tight critical path: 1 week for surveys and steel design, 4–6 weeks for planning and Building Control submission, 8–12 weeks on site. We strip the roof from inside where possible to keep the house weathertight. We share a Gantt-style schedule with every quotation.
Most rear-dormer and Velux loft conversions in Medway sit inside Permitted Development. Mansards, side dormers in conservation areas, and listed buildings need full planning consent. We always recommend a Lawful Development Certificate to lock in PD status.
We cover all of ME1 and the surrounding Kent postcodes from our Dartford base. Recent projects sit close to Rochester Cathedral and Chatham Historic Dockyard. Anywhere within 45 minutes of Dartford is comfortably inside our core delivery zone.
Yes — we hold £5 million Public Liability, £10 million Employer's Liability, full Contract Works insurance and Professional Indemnity. Certificates are provided with every quotation.
Use the free instant calculator at /quote for a 60-second ballpark, configure your project in detail at /configure, or call +44 7359 872594. We respond to every enquiry within 4 working hours.
Get a free site visit and a fixed written quotation within 5 working days. No obligation, no hard sell.