I've worked with Mucha Construction Ltd on various projects over the last 6 years and have found them consistently excellent in respect of work quality & efficiency and fair on price. No hesitation in recommending.
Clear costs, no surprises
Transforming your home across two levels, a double storey extension in Corsham creates additional living space with lasting and deliberate craftsmanship.
Done right, no shortcuts.
For families in Corsham looking to grow, a double storey extension provides the perfect answer when you want to stay. It offers extra room on both levels at once-perhaps a roomy kitchen on the ground floor and an additional bedroom above. We design each double storey extension to match the existing property, aligning brickwork and rooflines with precision.
For landlords and property investors in the area, a double storey extension is a smart method to enhance rental income and long-term value. Creating space on two levels increases usable square footage while avoiding the hassle of relocation, making it a solid decision. Our team brings extensive experience to ensure your project meets the expectations of renters and future buyers.
A double storey extension appeals to homeowners aiming for more space-ideal for a home office or guest suite, without compromising on layout. Rather than reverting to smaller additions, expanding your property significantly enhances its scale. We oversee all phases from groundwork to final touches, ensuring everything runs smoothly under one roof, bringing clarity without hassle.


Heavy plant machinery needs unhindered passage. Garden walls get dismantled, side gates come off their hinges, and tree branches need pruning back right away. If you plan a double storey extension in Corsham on a narrow plot, every spare foot of access matters for hauling heavy trench spoil out to the skips. Timber boards go over your turf. We walk the route with you before earthmovers arrive, spotting shallow inspection chambers or garden taps that could crack under wheel weight.
Dust travels through keyholes. Zip walls seal your hallway from the new opening, stopping fine masonry grit from coating your living room sofa or drifting into your kitchen cupboards. We isolate internal radiators before breaching exterior walls, capping pipework so central heating functions elsewhere during wet autumn mornings. A two-storey addition means knocking into the upstairs layout, so we box off carpets and mask bedroom doorways with heavy gauge polythene sheeting taped securely to skirting boards.
Adding a double storey extension brings significant square footage across both levels, resulting in far greater benefits compared to a single-level addition for a similar cost. Expanding upward and outward all in one project redefines everyday living.
A well-planned double storey extension boosts the market value of your property substantially, making it one of the most financially informed moves a homeowner can take. The added bedrooms and bathrooms attract both future buyers and estate valuers alike.
Every double storey extension crafted by us is meticulously aligned with the existing home, ensuring it feels inherently part of the original design. The end result is durable and aesthetically pleasing.
For growing families or those needing extra room, gaining everything required without moving offers convenience. The home adapts to suit the needs of its occupants, on their timeline.
We handle every trade and stage of your project entirely, from groundwork and structural work to finishing touches. This approach minimizes the downsides of juggling multiple contractors and maintains a high standard from start to finish.
Whether your focus is a larger kitchen area or an additional bedroom with an en-suite, the design conforms to your needs. The result is a home that operates efficiently and beautifully.
An extra bedroom and bathroom upstairs often reveals hidden limitations in existing plumbing. Gravity-fed tanks in your loft might fail to supply sufficient pressure to newly added showers, causing trickling outlets during peak family mornings. When executing a double storey extension in Corsham, pairing the new pipe runs with a modern unvented cylinder avoids pressure drops across both levels. We assess your boiler output early. Copper mains supply lines frequently require upsizing directly at the incoming stopcock.
Older electrical boards cannot always take extra circuits. Adding upper-floor lighting, multiple double sockets, and dedicated circuits for electric underfloor heating quickly fills the remaining spare ways in your fusebox. Electricians test the incoming supply capacity right inside your hallway cupboard before cutting chases into new blockwork. Replacing an outdated board avoids nuisance tripping later on. We route cables through floor joists away from heating pipes, leaving pull cords in cavities for future network wiring before wet plaster seals the ceilings.

We sit down with you to assess the full scope of your project, evaluate site conditions, and offer a clear initial estimate tailored to your requirements.
Our staff produce thorough architectural plans specific to your double storey extension and manage the submission of planning permissions and building regulations on your behalf.
Once approvals are complete, we outline the contract with a transparent cost breakdown and a detailed project schedule, ensuring every aspect of your double storey extension is defined before the work begins.
We manage all groundwork, foundation preparation, brickwork, structural framing, and roofing, making sure the new extension aligns perfectly with the existing home both structurally and visually.
We coordinate all building services, including plumbing, electrics, heating, and ventilation, followed by complete interior finishing. After a thorough final inspection, we hand over the finished property.
A double storey extension represents a key approach to boosting your home's usable area without the stress and expense of relocating. By adding room on both levels, you achieve a larger living or kitchen area along with an additional bedroom or bathroom upstairs. The significant size increase also directly affects property value, securing a wise long-term investment.
Each double storey extension we provide is designed to fit seamlessly with your existing structure in terms of brickwork, roofline, and window details, making it feel like a natural part of the home. This kind of harmony is essential for attracting buyers and fostering a positive impression, and a well-integrated extension enhances not just property value but also the character of your residence in ways that poorly executed additions fail to achieve.


Cold months bring saturated soil. Groundworkers lay down temporary stone haul roads so dumpers do not churn your lawn into a quagmire while excavating trenches. Concrete pours require frost blankets when temperatures drop towards freezing. We monitor weather radars daily to pour footings safely. A double storey extension in Corsham built during winter months simply requires disciplined ground protection and covered mortar bins.
Stripping roof tiles exposes timber structures. High winds present genuine risks when upper gable ends stand unbraced, so scaffolders install heavy-duty monoflex sheeting around every working lift. Heavy tarpaulins anchor over exposed rafters every afternoon, keeping driving rain from soaking through upper bedroom ceilings while joists await final roofing felt.
Sun dries brickwork too quickly. During hot summer weeks, mortar loses moisture before curing properly, creating weak joints in outer stone facing. Wetting bricks with a hose prevents them sucking water from the mix. We damp down fresh blockwork under hessian covers. Summer delivers longer daylight, speeding up the installation of upper floor joists and high-level fascia boards.
A double storey extension is a significant decision for any homeowner, meriting a careful execution. We regard every extension as a meticulously planned project, focusing on structural integrity, material choice, and finishing details right from the ground up. With extensive experience in complex residential builds, we know how to expand your living space across two levels while maintaining the charm of your property. The outcome is a harmonious addition that feels integral, not an afterthought.
From the first estimate to the final handover, your double storey extension is entirely managed by us. We orchestrate all necessary trades, ensuring structured communication and consistent scheduling across groundwork, framework, roofing, plumbing, and finishing stages. A project of this magnitude requires precise timing and collaboration-our approach revolves around those principles, giving you one point of contact for effortless oversight and clarity.
We work in Corsham and the surrounding areas, providing local expertise for your projects. Call us for a free estimate or visit us on site to discuss your needs. Our base in Henbury is about 25 miles away.
approx. 25 milesDistance from our base · Henbury
Call us+44 7723 542170Email usinfo@muchaconstruction.co.ukWe serve your areaCorsham and the surroundings
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Our Services
One team, from groundworks to final finish. New builds, extensions, loft conversions and full renovations.
New homes built to the engineer's calculations and signed off at every stage.
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House and kitchen extensions that add space, light and lasting value.
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Dormer, hip-to-gable and mansard conversions that turn lofts into rooms.
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Full renovations and modernisations, from HMOs to tired homes made new.
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RSJ installation, core drilling and crack stitching, built to proper standards.
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Kitchens, bathrooms and wet rooms finished with care and clean detail.
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Plumbing, electrics, ventilation and heating handled by one coordinated team.
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Ongoing building maintenance for landlords, investors and managed properties.
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Each project by our Construction Company leaves clients with refined spaces, enduring quality, and elevated comfort.
Mucha Construction Ltd delivers Construction Company services within a precise 20-mile radius of Bristol.
It depends on matching the existing structure, because local stone, render, or brick weather differently. Natural stone requires specific masonry skills and lime-based mortars to breathe, whereas rendered blockwork costs less initially but demands regular repainting to prevent damp staining over damp winters.
Provide structural drawings, ground soil reports, and clear drainage layouts before the survey. Knowing where your foul sewer runs, where the boundary lines sit, and whether your consumer unit has spare ways prevents unexpected excavation costs later.
Standard contracts cover the weather-tight shell, plastering, and basic first-fix cabling or plumbing runs. Decorating, carpet laying, bathroom brassware, and bespoke timber joinery are charged separately because client choices on finishes vary dramatically.
Underestimating how long plumbing fixtures take to arrive delays plasterers and tilers. Ordering baths, radiators, and tiles late holds up trades, forcing the site to pause while waiting for essential valves or waste pipes to get embedded inside partition walls.