What extensions and conversions cost in Manchester
Cost is usually the first question and the hardest to answer honestly online. Below is how pricing works on our projects, what moves the figure up or down, and what your quotation covers. An accurate price needs a survey and a written scope.
Prices last updated: [CLIENT DETAILS TO BE ADDED]
Instant estimate
What could your project cost?
Get an indicative starting range based on the type and size of project you\u2019re considering. No email address needed.
Typical cost bands from our own completed work
House extensions
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Driven by floor area, roof type, foundations, structural openings and glazing.
Garage conversions
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Usually the lowest cost per room gained, because walls and roof already exist.
Loft conversions
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Driven by conversion type, structural work, staircase position and whether an en-suite is included.
We do not publish invented ranges. Any figure shown above comes from our own completed projects, and an accurate price for your home needs a survey and a written scope of work.
What changes the final cost?
- Size of the new space and the structural work needed
- Foundation depth, ground conditions and nearby trees
- Roof type: flat, pitched, dormer or lantern
- Glazing choice and size of openings
- Drainage runs and any diversion required
- Level of finish, joinery and fitted furniture
- Access for machinery, skips and deliveries
- Time of year and programme length
Fees, professional costs and contingency
- Design and professional fees
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- Planning application fees
- Set by the local authority. Current householder application fee: [CLIENT DETAILS TO BE ADDED].
- Building Control fees
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- Structural engineer
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- Party wall surveyor (where required)
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- Specification and finishing choices
- Kitchens, bathrooms, flooring and glazing are the biggest swing in the final figure.
- Plumbing and electrical work
- Extra bathrooms, heating alterations and consumer unit upgrades are priced separately in your scope.
- Access and groundwork
- Restricted rear access means materials and spoil move by hand, which adds labour.
- Possible hidden conditions
- Drainage in the wrong place, defective timbers or poor ground are priced as written variations if found.
- VAT
- VAT treatment for your project: [CLIENT DETAILS TO BE ADDED]. Quotations state clearly whether VAT is included.
- Recommended contingency
- We recommend holding a contingency of [CLIENT DETAILS TO BE ADDED] of the build cost for unknowns.
Know what is included before work begins
- Written scope of work listing each element
- Preliminaries: welfare, protection, skips and scaffolding where needed
- Structure, roofing, windows and doors as specified
- Electrics, plumbing and heating as specified
- Plastering, joinery and decoration as specified
- Building Control application and inspections
- Completion inspection, snagging and handover
What may be excluded
- Furniture, appliances and soft furnishings unless listed
- Landscaping beyond making good the working area
- Utility company charges for meter or supply moves
- Works arising from conditions that could not be seen before opening up
Cost factors by project type
Each service page lists the specific things that move the price for that type of work.