How Much Does a Builder Cost in Fareham? A Local Guide to Pricing
Knowing what general building work should cost before you start getting quotes gives you the confidence to recognise a fair price when you see one and the awareness to question one that doesn’t add up. Building costs aren’t always transparent — the scope can vary between quotes, specifications differ, and what one builder includes as standard another treats as an extra. Without understanding what drives the price for different types of work, comparing quotes feels like guessing which number is closest to the truth rather than evaluating which quote represents the best value for a clearly defined job.
This guide sets out realistic costs for the most common domestic building projects across Fareham, explains what influences the price at each stage, and helps you budget accurately and compare quotes on a fair basis.
Common Project Costs Across Fareham
The following prices reflect what you should expect to pay for standard domestic building work across Fareham, Portchester, Titchfield, Stubbington, Hill Head, and the wider area. Every project varies depending on specific circumstances, but these figures give you a reliable starting point.
Single storey rear extensions are the most popular building project across Fareham. A modest three metre extension on a standard semi typically costs between £22,000 and £34,000 covering foundations, brickwork, roof, doors, plastering, electrics, flooring, and decoration. A larger extension of four to six metres with bi-fold doors, a roof lantern, underfloor heating, and a fitted kitchen typically costs between £35,000 and £55,000. A premium specification with large-format sliding doors, structural glazing, and high-end finishing reaches £55,000 to £75,000. The semi-detached and detached housing across Portchester, Titchfield, and the established streets around Fareham town centre suits single storey extensions well.
Double storey extensions deliver the best value per square metre because foundations, walls, and roof serve both floors. A double storey rear extension in Fareham typically costs between £35,000 and £68,000 depending on size and specification. The cost per square metre drops from the £1,700 to £2,400 range of a single storey to £1,300 to £1,900 for a double storey because the most expensive elements only happen once.
Loft conversions add a full extra floor without building outward. A Velux conversion — the simplest type using roof windows within the existing roof shape — typically costs between £20,000 and £35,000. A rear dormer that extends the roof outward to create more headroom and floor area costs between £30,000 and £50,000. A hip-to-gable conversion combined with a rear dormer — common on Fareham’s semi-detached housing — costs between £40,000 and £58,000. Most include an ensuite bathroom.
Garage conversions offer one of the most cost-effective ways to gain living space. Converting an integral or attached garage in Fareham typically costs between £8,000 and £18,000 depending on the size and specification. The existing structure keeps costs well below a new-build extension while providing a fully functional room — bedroom, office, playroom, or gym.
Kitchen renovations range widely depending on specification. A straightforward replacement in the existing layout costs between £8,000 and £15,000. A mid-range renovation with layout changes, new plumbing and electrics, and quality finishing costs between £15,000 and £28,000. A major kitchen project with structural wall removal, premium units, stone worktops, and comprehensive finishing reaches £28,000 to £45,000.
Bathroom renovations follow a similar pattern. A basic suite replacement with retiling costs £3,500 to £6,500. A full renovation with layout changes, floor-to-ceiling tiling, and quality sanitaryware costs £7,000 to £14,000. A premium bathroom with designer fittings, large-format tiles, underfloor heating, and a walk-in shower reaches £14,000 to £22,000.
Structural alterations — removing a load-bearing wall and installing a steel beam to create open-plan living — typically cost between £3,000 and £8,000 per opening depending on the span, the beam specification, and the extent of making good. This is one of the most transformative improvements per pound spent and is commonly combined with kitchen extensions across Fareham.
Garden rooms for home offices, studios, or gyms typically cost between £12,000 and £30,000 depending on size and specification. A basic insulated room with electrics and heating sits at the lower end. A larger, premium-specification room with full services and high-end finishing reaches the upper end.
Day Rates vs Fixed Pricing
Most substantial building projects across Fareham are quoted as a fixed price for the complete job rather than a day rate. Fixed pricing gives you cost certainty — you know exactly what the work costs before it starts, regardless of how long it takes. The risk of the job running longer than expected sits with the builder rather than you.
Day rates, where they apply, typically range from £180 to £280 per day for an experienced builder across Fareham depending on the type of work and skills involved. Specialist trades command different rates — electricians, plumbers, plasterers, and tilers each have their own pricing. However, day rates can be misleading for larger projects because they don’t account for materials, waste disposal, equipment hire, or the overhead of coordinating multiple trades.
For any project beyond a simple repair or a day’s work, always request a fixed price for a defined scope rather than agreeing to day rates. It protects your budget and makes comparing quotes meaningful.
What Affects Building Costs?
Several factors determine why quotes vary for what appears to be the same job.
Property age and construction have a significant impact on labour time and cost. Fareham’s housing stock includes period properties around the town centre, Victorian and Edwardian terraces through the older streets, inter-war housing across Portchester and the established areas, and newer developments on the edges of the town. Each era of construction presents different challenges. Period properties with solid brick walls, lath and plaster, and non-standard structural arrangements take longer to work with than modern plasterboard and blockwork. A kitchen extension on a Victorian property in central Fareham costs more per square metre than the same extension on a 1990s house in Whiteley because the construction demands more time and skill at every stage.
Ground conditions affect foundation costs on any project that involves building on the ground. Fareham sits on a mix of clay and gravel, and ground conditions vary across the town. Properties near the coast around Hill Head and Stubbington may encounter different soil behaviour to those further inland around Wickham and Knowle. Trees close to the build, previous ground disturbance, and drainage considerations all influence foundation design and cost. Your builder should assess the ground during the initial site visit and account for it in the quote rather than discovering complications after work has started.
Specification choices are the most controllable variable in any building budget. Within the same room layout, a laminate worktop costs a fraction of quartz. Standard ceramic tiles cost a fraction of large-format porcelain. A basic bathroom suite costs a fraction of designer sanitaryware. Bi-fold doors range from £2,000 to £8,000 depending on material, size, and manufacturer. These are decisions you make consciously, and being clear about your specification before requesting quotes ensures every builder prices the same job.
Access and logistics influence costs where getting materials in and waste out is difficult. Properties on narrow streets, those without side access, and homes on constrained plots add time for material handling and waste removal compared to properties with clear access and driveway space.
The scope of finishing included in the quote makes a significant difference. Some builders quote the structural work and leave you to arrange plastering, electrics, and decoration separately. Others quote the complete project from foundations to final finishing. Neither approach is wrong, but you need to understand which basis each builder is quoting on to compare prices fairly. A quote that looks cheaper but excludes three trades you’ll need to arrange and pay for separately isn’t actually cheaper once the true total is calculated.
How to Compare Quotes Fairly
Getting two or three quotes is sensible for any significant building project, but the comparison only works if each builder is pricing the same job to the same specification.
Define the scope before you quote. Walk through exactly what you want with each builder — the size, the specification, the finishing standard, and what’s included. Write it down and hand the same brief to everyone. Without a consistent scope, you’re comparing different interpretations of what you described verbally, and the prices reflect those different assumptions rather than different value.
Check what’s included and what’s excluded. Does the quote include foundations, steelwork, building control fees, scaffolding, skip hire, plastering, electrics, plumbing, kitchen fitting, flooring, and decoration? Or does it cover the shell only with everything else as extras? Itemised quotes let you see the cost of each element and identify where differences lie.
Don’t automatically choose the cheapest. The lowest quote often reflects something missing from the scope, a lower specification assumption, or less experienced tradespeople. The most expensive doesn’t automatically mean the best quality either. The best value comes from a detailed, itemised quote at a fair price from a builder who communicates clearly, has demonstrable experience with your type of project, and includes everything you need for a finished, usable result.
Ask about payment terms. Staged payments tied to completed milestones — deposit on commencement, payment at foundation completion, payment at watertight stage, final payment on completion — protect both sides. Avoid builders who request large upfront payments before visible progress or who want the majority of the money before the job is substantially complete.
Check insurance and qualifications. Public liability insurance protects you if something goes wrong during the build. Gas Safe registration is required for any gas work. Competent person scheme registration covers electrical installations. Building control approval and completion certificates are required for notifiable work. Confirm all of these are in place before work starts.
Getting Started
If you’re planning building work at your Fareham property — whether it’s an extension, a conversion, a garden room, renovation, or a project that doesn’t fit a neat category — get in touch for a free consultation. We’ll visit your property, discuss what you want to achieve, and provide a detailed, itemised quote that gives you the information to plan your project with confidence.