Based in Grassendale, Liverpool, covering the Wirral & Merseyside 07703 4345450151 345 4350office@pbsnw.uk - HomeAboutServices Areas Our WorkContactGet your free quote Home / Services / Double Storey Extensions # Double Storey Extensionsin Merseyside & surrounding areas A double storey extension adds space on two floors at once, typically extra living space downstairs and an extra bedroom or bathroom upstairs. It’s a bigger project, so it pays to have one experienced team running it. We coordinate every stage and every trade, and you get a free, fixed-price quote before work begins. Get your free quote Call 07703 434545 Family-run for over 40 years · all work fully guaranteed One point of contact from start to finish - Our own team handles every stage - From planning advice through to decorating & landscaping - Architects & structural engineers we can recommend - Fully qualified tradespeople on every job - Covering Liverpool, the Wirral & Merseyside - Open 8am-6pm - One point of contact from start to finish - Our own team handles every stage - From planning advice through to decorating & landscaping - Architects & structural engineers we can recommend - Fully qualified tradespeople on every job - Covering Liverpool, the Wirral & Merseyside - Open 8am-6pm What’s included ## From advice and planning through to the finish. ### Advice and options We talk through how the new rooms will connect with your existing home on both floors. ### Planning advice and support We advise on what’s needed and work with architects and structural engineers we can recommend. ### Structure on two levels Foundations, walls, floors, steelwork and roofing built by our team of fully qualified tradespeople. ### Joining old and new Opening into the existing house carefully, with staircases, landings and rooms tied in neatly. ### Finishing Electrics, plumbing, plastering, decorating and landscaping, all managed for you. How it works ## Three clear steps, one contact. - 01 ### Free, fixed-price quote We visit, talk through what you want and give you a clear, fixed price for the agreed work. - 02 ### Planning advice and support We advise on what’s needed and work with architects and structural engineers we can recommend. - 03 ### Build and finish Our team of fully qualified tradespeople builds and finishes the work, with one point of contact throughout. Why choose Premier ## What you get with Premier. - Family-run for over 40 years A family business with decades of building work behind it. - A skilled team with 20+ years’ hands-on experience Our family-run building team, led by Anthony and his brother, is on hand throughout your project. - One point of contact From advice and planning through to decorating and landscaping. - Trusted, fully qualified tradespeople Our own team handles every stage, so you deal with one team from start to finish. - Free, fixed-price quotes You know the cost of the agreed work before anything starts. - Fully guaranteed and insured All work fully guaranteed. Public liability and employer’s liability insured. Project photos See all our work Questions ## Double Storey Extensions: straight answers. Do I need planning permission or building regulations approval for a double storey extension?It depends on the property and what you want to do, so we don’t give blanket answers. Anthony will look at your home and advise on what’s needed for your project, and we work with architects and structural engineers we can recommend to prepare any drawings and calculations. How much will a double storey extension cost?Every job is different, so we don’t publish prices. We visit, talk through what you want and give you a free, fixed-price quote, so you know the full cost of the agreed work before anything starts. Can we stay in the house while the work is done?Many people do, but it depends on the project and your household. Anthony will talk this through with you at the visit so you can plan ahead. Who will I deal with during the work?You’ll have one point of contact throughout. Anthony Hancock, who works alongside his brother, runs each job and coordinates our team of fully qualified tradespeople, so you deal with one team from start to finish. Areas we cover ## Double Storey Extensions across Liverpool, the Wirral and Merseyside. - Builders in Aigburth - Builders in Allerton - Builders in Woolton - Builders in Childwall - Builders in Wavertree - Builders in Birkenhead - Builders in Wallasey - Builders in Heswall - Builders in West Kirby - Builders in Sefton - Builders in Knowsley - Builders in St Helens ### Related services - Single Storey Extensions in Liverpool & the Wirral - Loft Conversions in Liverpool & the Wirral - Kitchen Extensions in Liverpool & the Wirral - All building services ## Get your free quote for double storey extensions. Tell us about your project and Anthony will be in touch to arrange a visit and a free, fixed-price quote. Call 07703 434545 or 0151 345 4350 - Free, fixed-price quote - One point of contact from start to finish - Fully insured and all work fully guaranteed Premier Building Solutions NW Ltd 191 St Mary's Road, Grassendale, Liverpool, L19 0NE 07703 434545 0151 345 4350office@pbsnw.uk Services - Single Storey Extensions Liverpool & Wirral - Double Storey Extensions Liverpool & Wirral - Kitchen Extensions Liverpool & Wirral - Loft Conversions Liverpool & Wirral - House Renovations Liverpool & Wirral - Knock-Throughs & Structural Alterations Liverpool & Wirral - Kitchens Liverpool & Wirral - Bathrooms Liverpool & Wirral - HMO Conversions Liverpool & Wirral Areas covered - Builders Aigburth - Builders Allerton - Builders Woolton - Builders Childwall - Builders Wavertree - Builders Birkenhead - Builders Wallasey - Builders Heswall - Builders West Kirby - Builders Sefton - Builders Knowsley - Builders St Helens © 2026 Premier Building Solutions NW LtdAboutOur building projectsFree building quotePrivacy policyTerms & conditionsCookie policy Call nowFree quote