New Build and Self-Build Contractors in Berkshire
AA Contractor manages new build and self-build projects across Berkshire, from initial groundworks and foundations through to the final building control sign off, under a single written contract.
We work in Reading, Windsor, Wokingham, Maidenhead, Slough, Newbury, Bracknell, Ascot, Crowthorne, and the surrounding villages. We act as main contractor on every project — one contact, one contract, one programme.
If you have planning permission and architectural drawings ready, we can give you a free written estimate.
AA Contractor manages new build and self-build projects across Berkshire, from groundworks and foundations through to structural frame, building control inspections, and completion certificate, under a single written contract with a clear scope of works.
What AA Contractor Handles on a New Build Project
A new build involves more moving parts than an extension or a renovation. There are eight distinct construction stages, and each one has to be completed and inspected before the next one begins. AA Contractor manages all eight stages as main contractor.
Here is what the construction programme covers on a typical Berkshire new build:
- Site clearance, topsoil strip, and temporary site setup
- Groundworks: foundations, drainage runs, soakaway, and oversite concrete
- Structural frame: block and beam, or timber frame, to structural calculations
- Roofing: structure, felt, battens, tiles or slates, and flashings
- Windows, external doors, and the building made weatherproof
- First fix: mechanical and electrical carcassing, insulation, air tightness layer
- Internal trades: plastering, joinery, staircase, second fix M&E
- Finishes, decoration, snagging, and handover with completion certificate
Foundation type is one of the first decisions on any Berkshire new build. In the clay-heavy soils of Reading suburbs such as Tilehurst, Earley, and Caversham, deeper strip foundations are often needed compared to chalk downland areas west of Newbury. Near the River Thames in Maidenhead, Marlow, or Wraysbury, ground investigation reports sometimes recommend raft foundations. AA Contractor reviews the structural engineer’s foundation design before groundworks begin so there are no surprises once we are on site.
Every stage is coordinated by AA Contractor. You do not manage separate subcontractors. You have one contact, one contract, and one programme.
What does a new build contractor handle? A new build in Berkshire handled by AA Contractor covers 8 construction stages: site clearance, foundations, structural frame, roofing, first fix mechanical and electrical, insulation, internal trades, and final finishes, all coordinated by AA Contractor as main contractor under one written contract.
Planning Permission for New Build Homes in Berkshire
Every new dwelling in Berkshire requires full planning permission from the relevant Local Planning Authority. There is no permitted development route for a ground-up new build.
Berkshire has six unitary authorities, each with its own planning department:
Planning permission and building regulations approval are two separate applications. Many self-builders confuse them. Planning permission controls what can be built and where. Building regulations control how it is built. Both are needed before construction starts.
If your plot is in a conservation area, near a listed building, or within the North Wessex Downs National Landscape (which covers much of West Berkshire west of Newbury), the planning authority may place additional conditions on materials, heights, or design. AA Contractor is familiar with these requirements across the county.
What is pre-application advice and should I use it?
Pre-application advice is a paid service offered by all six Berkshire planning authorities. You present your scheme to a planning officer before submitting a formal application. The officer gives written feedback on whether the proposal is likely to be approved and what changes might be needed.
For a new build on an infill plot, a backland plot, or a plot in a sensitive location, pre-application advice is worth the cost. It reduces the risk of a refused application and wasted architect fees. The Planning Portal (planningportal.co.uk) has guidance on the pre-application process for all English local authorities.
Planning permission for new build Berkshire: Every new build in Berkshire requires full planning permission from the Local Planning Authority before construction starts. Planning permission and building regulations approval are separate applications. Both are required. AA Contractor coordinates building control throughout the construction programme once planning permission is in place.
Building Regulations, Structural Calculations, and Building Control Sign Off
Building regulations set the technical standards for how a building must be constructed. They cover structural safety, fire safety, drainage, insulation, ventilation, and energy performance. A new build in Berkshire must comply with The Building Regulations 2010 and any subsequent amendments.
AA Contractor coordinates building control on every new build project. We work with Local Authority Building Control (LABC) through the relevant Berkshire authority, or with an approved inspector. Building control visits the site at five key stages:
- Foundations Inspection Before concrete is poured into the trenches
- Structural Frame Inspection Once the frame is complete and before internal works begin
- Drainage Inspection Before drains are backfilled
- Insulation & Air Tightness Inspection Before plasterboard is fixed
- Completion Inspection Issue of the completion certificate
The completion certificate is a legal document. It confirms the building was constructed in accordance with building regulations. Without it, you cannot legally occupy the building, and your mortgage lender will not release the final stage payment on a self-build mortgage.
What are structural calculations and who produces them?
Structural calculations are produced by a structural engineer, not by the architect and not by the contractor. They set out the engineering design for the foundations, load-bearing walls, beams, roof structure, and any steel elements such as RSJ beams over openings.
The calculations are submitted as part of the building regulations application, alongside the architectural drawings. AA Contractor builds to the approved structural calculations exactly as specified. We do not alter or reinterpret calculations on site. If ground conditions differ from what was assumed in the calculations, we notify the structural engineer and get revised instructions before proceeding.
This process matters because building control inspectors check structural elements against the approved calculations. Any deviation without engineering sign-off creates a compliance issue that can delay sign off, affect the NHBC warranty, and cause problems with the mortgage lender.
Building regulations new build Berkshire: Building regulations for a new build in Berkshire require 5 inspection stages: foundations, structural frame, drainage, insulation and air tightness, and final completion. AA Contractor coordinates each inspection with the Local Authority Building Control body so stage certificates are issued on time, which is a requirement for self-build mortgage drawdowns.
How AA Contractor Works with Self-Build Mortgages and Stage Payments
Most people building their own home in Berkshire fund the construction through a specialist self-build mortgage. These work very differently from a standard residential mortgage.
With a standard mortgage, the lender releases the full loan at completion of purchase. With a self-build mortgage, the lender releases funds in stages as construction progresses. The two most common structures are:
Arrears Stage Payment
Funds released after each stage is complete and inspected. Lower risk for the lender, but the self-builder needs enough cash to fund each stage before the drawdown.
Advance Stage Payment
Funds released at the start of each stage. Better for cash flow, but typically requires a higher deposit and attracts a slightly higher interest rate.
The lenders who offer self-build mortgages in the UK include Buildstore-partnered lenders, BuildLoan, Bath Building Society, Ecology Building Society, and several mainstream banks. Each lender sets its own requirements for what documentation it needs at each stage drawdown.
AA Contractor’s written programme of works sets out each construction stage with defined milestones. Building control stage certificates are issued by the LABC inspector after each inspection. We make sure these certificates are available for your mortgage broker or lender as soon as they are issued.
What construction milestones does a self-build mortgage lender typically require?
Lenders vary, but the most common stage release points are:
- Land and preliminary costs stage (at the start, before construction begins)
- Foundations complete (after building control inspection of foundations)
- Weatherproof stage (structural frame, roofing, and windows complete)
- First fix complete (internal carcassing, insulation, and pre-plaster stage)
- Practical completion (building finished, snagging complete, before occupation)
Most lenders also require an NHBC Buildmark warranty or a professional consultant’s certificate (PCC) from an architect or surveyor before they will lend. NHBC registration must be set up before groundworks begin. AA Contractor can advise on NHBC registration requirements at the start of the project so the warranty is in place when the lender needs it.
How self-build mortgage works with a contractor: Self-build mortgages release funds at defined construction stages, typically foundations, weatherproof, first fix, second fix, and practical completion. AA Contractor’s written programme of works and building control stage certificates align with these milestones, so lender drawdowns are not delayed by missing paperwork.
Ready to discuss how your self-build mortgage aligns with our construction programme?
Speak to AA ContractorNew Build Cost in Berkshire: What to Budget in 2025 and 2026
Construction costs in Berkshire are above the UK average, mainly because labour rates in the Thames Valley are higher than the national benchmark. The proximity to London pushes trade rates up across the county, and materials transport costs along the M4 and A34 corridors add a small premium on larger deliveries.
For a contractor-managed new build in Berkshire, the current construction cost range is:
| Specification Level | Cost per m² |
|---|---|
| Standard specification | From £2,200 per m² |
| Good specification (above Building Regs minimum) | £2,400 – £2,800 per m² |
| High specification or complex design | £2,800 – £3,500+ per m² |
These figures are for construction only. They do not include land, architect fees, structural engineer fees, planning fees, building regulations application fees, NHBC warranty registration, VAT on materials, or landscaping.
As a working example: a 180 m² four-bedroom house built to a good specification in Wokingham or Maidenhead would cost roughly £430,000 to £504,000 in construction. Add professional fees of around 12–15% of the build cost, and a contingency fund of 15–20%, and the total project budget before land sits between £520,000 and £630,000.
What affects the construction cost on a Berkshire new build?
The four biggest cost variables on a Berkshire plot are:
Ground Conditions
Clay soils in parts of Reading and Slough require deeper strip foundations than chalk downland in West Berkshire. A ground investigation report (soil survey) before you commit to a plot is money well spent.
Plot Access & Site Constraints
An infill plot off a residential street in Wokingham is easier and cheaper to build on than a backland plot reached through a narrow access road in a village near Hungerford or Lambourn.
Specification Level
Decisions on window specification, insulation levels, mechanical ventilation, flooring, and kitchen standard drive the cost more than most self-builders expect.
Conservation Area or Listed Building Neighbour Constraints
Plots near Windsor Castle, in the older parts of Newbury, or in villages along the Kennet and Avon Canal corridor may carry planning conditions on external materials such as brick type, tile colour, or window style.
AA Contractor provides a free written estimate based on the client’s architectural drawings and technical specification. The estimate sets out what is included and what is not. There are no provisional sums hidden in the total figure without explanation.
New build cost Berkshire: A contractor-managed new build in Berkshire costs between £2,200 and £3,500 per square metre for construction, excluding land, professional fees, and VAT on materials. AA Contractor provides a free written estimate based on architectural drawings and a detailed specification before any commitment is made.
The New Build Process in Berkshire: From Plot to Completion Certificate
The process below sets out how a typical new build or self-build project runs in Berkshire. AA Contractor’s role starts at Stage 4. Stages 1 to 3 are led by the client and their architect before the contractor is appointed.
Plot secured with full planning permission in place
AA Contractor needs planning permission to be granted before we can produce a written estimate. Planning drawings are not the same as construction drawings. We cannot price from a planning drawing because it does not contain the level of technical detail needed to cost groundworks, structure, and finishes accurately.
Architect produces building regulations drawings and technical specification
Your architect moves from planning drawings to building regulations drawings. These are detailed technical documents showing foundation design, wall construction, insulation specification, roof build-up, drainage layout, window sizes, and room dimensions. The structural engineer produces structural calculations at the same time. Both documents are submitted to the Local Authority Building Control for approval.
Building regulations application submitted and approved
The LABC reviews the drawings and calculations and either approves them or requests amendments. Approval is usually granted within five weeks for straightforward domestic new builds, though complex schemes or those in sensitive planning areas can take longer. AA Contractor does not need to wait for full approval before producing an estimate, but groundworks cannot start until building regulations approval is in place.
Written scope of works and contract agreed with AA Contractor
We price the project from the architect’s technical drawings and specification. We produce a written scope of works that sets out every element of the construction, stage by stage. You review it, we discuss any questions, and once agreed we sign a written contract. No work starts without a signed contract.
CIL Exemption — Important: If you are a self-builder occupying the home as your primary residence, you may be eligible to claim a Community Infrastructure Levy (CIL) exemption. This must be done before groundworks start on site. Form 7 (Self Build Exemption Claim Part 1) must be submitted to the relevant Berkshire authority before commencement. Missing this deadline means the exemption is lost and full CIL liability applies. AA Contractor flags this at every self-build project.
Groundworks
Site clearance, topsoil strip, setting out, foundations, drainage runs, soakaway installation, and oversite concrete. Building control inspects foundations before concrete is poured. This is the first of five building control inspections.
Structural frame, roofing, and weatherproof stage
The structural frame goes up to structural calculations. Roofing follows: structure, insulation, battens, and tiles or slates. Windows and external doors are fitted. Once the building is weatherproof, the second and third building control inspections take place (structural frame and drainage). This is the stage at which most self-build mortgage lenders release the weatherproof stage payment.
Internal trades, finishes, and completion certificate
First fix mechanical and electrical, plasterboard, insulation, and air tightness membrane. Fourth building control inspection before boarding up. Then second fix, plastering, joinery, flooring, kitchen, bathrooms, decoration, and external works. Final snagging. Fifth building control inspection and issue of the completion certificate.
The completion certificate is provided to the client, the mortgage lender, and is kept on record with the LABC. It confirms the building complies with building regulations and is legally safe to occupy.
New build process Berkshire step by step: A new build in Berkshire follows 7 stages: plot with planning permission, architect drawings and structural calculations, building regulations approval, written contract with main contractor, groundworks and foundations, structural frame and weatherproof stage, internal trades and completion certificate. AA Contractor manages stages 4 through 7 as main contractor.
What You Need Before Requesting a New Build Quote from AA Contractor
To give you an accurate written estimate, AA Contractor needs three things from you:
- Full planning permission Granted by the relevant Berkshire Local Planning Authority. Not pending. Not in appeal. Granted.Required
- Architect’s building regulations drawings Detailed technical drawings — not the planning drawings. Must include floor plans, elevations, sections, wall construction details, insulation specification, and drainage layout.Required
- Structural engineer’s calculations Covering foundation design, structural frame elements, beam specifications, and roof structure. Without calculations we cannot check that what is shown on the drawings is achievable within the estimate.Required
Useful but not required before we quote:
- Ground investigation report (soil survey) If you have one, it reduces risk for both sides.Optional
- Self-build mortgage offer in principle Knowing your lender’s stage payment structure helps us align the programme to your drawdown schedule.Optional
- NHBC warranty registration This needs to be in place before groundworks start. We can advise on timing.Optional
AA Contractor does not provide architectural design or planning services. We are not architects and we do not produce structural calculations. Our role starts once the design is resolved and approved.
If you do not yet have an architect, the Royal Institute of British Architects (RIBA) publishes a directory of registered architects at architecture.com. There are experienced self-build architects working across Berkshire, including several with projects completed in Reading, Windsor, and the West Berkshire downs. We can provide referral guidance if needed.
What do I need before approaching a new build contractor? To receive a written new build estimate from AA Contractor in Berkshire, clients need full planning permission, architect’s building regulations drawings, and a structural engineer’s calculations. AA Contractor prices from the technical specification and builds to it. Design and planning are handled by the client’s architect before construction begins.
Why Berkshire Self-Builders and Plot Owners Choose AA Contractor
There are things a local contractor knows after 20 years working in one area that cannot be read in a textbook. We know that building control officers at Wokingham Borough Council and West Berkshire Council work differently. We know which soil conditions to expect on infill plots behind Church Street in Wokingham versus a new plot off the Bath Road in Reading. We know that Thames-side plots from Maidenhead through to Datchet and Wraysbury carry flood risk requirements that affect foundation depth and floor level.
AA Contractor trades as A and A Master Contractor Ltd, registered in England and Wales. Address: Ground Floor, 2 Carnegie Court, The Broadway, Farnham Common, Slough, SL2 3GQ. New build and self-build work across a 20-mile radius including all six Berkshire unitary authority areas.
Frequently Asked Questions: New Build and Self-Build in Berkshire
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A contractor-managed new build in Berkshire costs between £2,200 and £3,500 per square metre for construction, depending on specification. A 180 m² home at good specification costs roughly £430,000 to £504,000 to build, not including land, architect, structural engineer, planning fees, or NHBC warranty. A contingency of 15 to 20% of the build cost is standard on all new builds.
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Yes. All new dwellings in Berkshire require full planning permission from the Local Planning Authority: West Berkshire Council, Wokingham Borough Council, Royal Borough of Windsor and Maidenhead, Reading Borough Council, Bracknell Forest Council, or Slough Borough Council. Planning permission and building regulations approval are two separate applications. Both are required before construction can begin.
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Planning permission controls what can be built and where. It deals with design, scale, appearance, and impact on the surrounding area. Building regulations control how the building is constructed, covering structural safety, fire safety, drainage, insulation, ventilation, and energy performance. A new build in Berkshire needs both. Planning permission comes first. Building regulations approval covers the technical construction drawings that follow.
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A self-build mortgage releases funds at defined construction stages, typically foundations complete, weatherproof stage, first fix complete, second fix complete, and practical completion. AA Contractor’s written programme of works sets out each stage with defined milestones. Building control stage certificates, issued by the LABC inspector after each inspection, trigger the stage payments. We make sure these certificates reach your mortgage broker without delay.
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Self-builders who occupy the completed home as their primary residence can claim a CIL exemption. The exemption is not automatic. Form 7 (Self Build Exemption Claim Part 1) must be submitted to the local planning authority before any work starts on site. If you begin groundworks without submitting Form 7, the exemption is lost. AA Contractor flags this requirement at the contract stage on every self-build project in Berkshire.
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Foundation type depends on ground conditions, which vary significantly across Berkshire. Strip foundations are standard on stable ground. Raft foundations suit variable or softer ground. Pile foundations are used on unstable or contaminated sites. Reading suburban soils, particularly in Caversham, Earley, and Tilehurst, are typically London clay and often require deeper strip foundations. Chalk downland areas west of Newbury generally offer better ground conditions. A ground investigation report before purchasing a plot removes uncertainty.
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Under the Self-Build and Custom Housebuilding Act 2015, all six Berkshire local authorities must maintain a register of people seeking serviced plots to build their own home. Registering on the West Berkshire, Wokingham, Windsor and Maidenhead, Reading, Bracknell Forest, or Slough self-build register does not guarantee a plot. It is a material consideration in planning decisions and gives the council data on local demand for serviced plots. More information is available at gov.uk/guidance/self-build-and-custom-housebuilding.
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Yes. AA Contractor prices and builds from architectural drawings. We do not provide design, planning, or architectural services. An architect registered with the RIBA produces planning drawings, building regulations drawings, and a technical specification. AA Contractor prices from those documents once they are finalised. If you are at an early stage and do not yet have an architect, we can point you toward RIBA-registered practices with Berkshire self-build experience.