Chesterfield
Loft Conversion, Chesterfield
GSM Construction carried out a full loft conversion for Matt Allen in Chesterfield.
Read case study →
Construction Services
Loft Conversions in Chesterfield & Derbyshire
Full structural loft conversions across Chesterfield, Dronfield, Sheffield and the wider Derbyshire area. Velux, dormer and hip-to-gable: every trade in-house, from steelwork to plastering, all on one contract.
Free Quotes
£5m Public Liability
5.0 Star Rated
Local to Chesterfield
Built for this
A loft conversion is eleven trades in a tight space, and coordination is everything.
Steelwork. Carpentry. Roofing. Windows. First-fix electrics. Plumbing, if you’re adding an en-suite. Plastering. Flooring. Decoration. These trades run in tight sequence in a confined space with restricted access. When one contractor manages all of them, the handoff from steel to timber to plaster happens automatically. When you’re co-ordinating three separate firms in a loft, the gaps between them add weeks, and you carry the risk when something goes wrong.
We’ve stepped in on loft conversions that stalled when the “loft specialist” hit structural issues and walked. We’ve taken over half-finished dormer builds where the waterproofing wasn’t right. It’s avoidable, and with GSM it doesn’t happen, because we carry every trade ourselves.
Gaz oversees the structural work personally. The same team that installs the steels fits the staircase, plasters the walls and lays the floor. One contract, one team, no gaps.
Conversion types
Which Type of Loft Conversion Is Right for You?
The right conversion depends on your roof structure, head height and what you want from the space. We’ll advise honestly at the first site visit.
Velux / Rooflight
The simplest and most cost-effective option. Rooflights installed into the existing pitch. Minimal structural work, fastest programme, and no change to the roofline from outside.
Dormer
A box-shaped extension to the roof slope that adds full head height and usable floor area. The most popular choice for a bedroom with en-suite. Maximises the usable space.
Hip-to-Gable
Converts a hipped (sloping) end of the roof into a vertical gable wall, dramatically increasing the floor area and head height. Often combined with a rear dormer for maximum gain.
Mansard
The most substantial conversion, a near-vertical rear wall with a steeply pitched roof. Maximum space gain, typically used on Victorian terraces. Usually requires planning permission.
Fully managed
Every trade, from the structural steels to the last coat of paint.
A loft conversion involves more trades than most homeowners expect. Here’s everything we handle in-house on a typical dormer or hip-to-gable project.
- Structural engineer drawings
- Party wall matters (where applicable)
- Steelwork & timber frame
- New staircase
- Dormer structure & waterproofing
- Roof tiles & lead flashing
- Velux / dormer windows
- Electrics (lighting, sockets, smoke alarm)
- Plumbing (en-suite if required)
- Plastering & drylining
- Flooring
- Building Control sign-off
We liaise with your structural engineer, manage the Building Control application and inspections throughout the build, and hand over a fully signed-off space ready to use. You won’t need to deal with anyone other than us.
Our process
How Your Loft Conversion Comes Together
Four clear stages, one team, no surprises. Here’s what to expect when you work with GSM on a loft conversion.
01
Free Site Visit
Gaz comes up into the loft, checks head height, roof structure and pitch, and gives you an honest steer on what type of conversion is possible, before a single penny changes hands.
02
Structural Drawings + Quote
We commission structural engineer drawings, then give you a full detailed quote with no hidden costs. Planning advice included. Most loft conversions fall under Permitted Development, but we’ll confirm what applies to your property.
03
Start Date + Build Schedule
Once you approve, we agree a start date and hand you a full build schedule. Building Control is notified and ready. You’ll know exactly what’s happening week by week.
04
Build + Handover
Our team works through every trade in sequence: steels, timber, roofing, windows, first-fix services, plaster, finish. Gaz checks quality at every stage. You receive a fully signed-off, snagged room ready to use.
Real Projects. Real Customers.
Our Loft Conversions Work
Had the lads in to convert my loft. Couldn't be happier. 100% recommend.
MA
Matt Allen
Loft Conversions, Chesterfield
We couldn't be happier with the work carried out by GSM. They completely transformed our home by removing our old kitchen, knocking through the internal wall between the kitchen and dining room, carrying out all the associated building work, and installing our beautiful new Chatsworth…
CB
Chris Briggs
Kitchen Renovations, Walton, Chesterfield
Gaz and his team have just completed a conversion of our garage into a home office/den. From our initial conversation throughout the project Gaz was great to deal with. I asked him to take care of the whole project — up to and including decorating.…
MS
Martin Slepowronski
Garage Conversions, Chesterfield
We needed to rearrange the ground floor of our new house to better suit our growing family. GSM construction took down a load bearing wall to create an open plan living family kitchen, and built up a partition wall to separate off a separate snug.…
LC
Louise Cowan
Kitchen Renovations, Chesterfield
Where we work
Loft Conversions Across Chesterfield & Derbyshire
We’re based in Chesterfield and carry out most of our loft conversion work within 20 miles, close enough for Gaz to visit regularly and respond quickly at every stage of the build.
Chesterfield & Brampton
Victorian terraces throughout Brampton, Walton Road and Newbold have steep roof pitches and good head height, often ideal candidates for dormer or mansard conversions. We know these roof types well and carry out loft work here regularly.
Dronfield, Eckington & Staveley
Strong demand for loft conversions across the Dronfield and Eckington areas as families choose to extend upwards rather than move. Detached and semi-detached properties here typically suit hip-to-gable conversions well.
Peak District Villages: Bakewell, Baslow, Hathersage
Stone properties in the Peak District and Dark Peak areas require careful planning consideration. National Park rules apply to roofline changes. We have experience working within these constraints and matching stonework where required.
Sheffield, Clay Cross & Wider Derbyshire
We regularly travel across the wider area for loft conversion projects. Totley, Dore and Millhouses in South Sheffield have a high proportion of semis with excellent conversion potential. Get in touch and we’ll let you know what’s achievable.
Not sure if we cover your area? Call Gaz directly on 07727 263707 and we’ll give you a straight answer.
FAQ
Loft Conversion Questions Answered
The most common questions homeowners ask us before starting a loft conversion in Chesterfield and Derbyshire.
Most loft conversions, including Velux and dormer conversions, fall under Permitted Development and don’t require a full planning application. The main exceptions are properties in conservation areas, the Peak District National Park, or where the conversion would extend beyond the highest point of the existing roof. We’ll confirm what applies to your property at the first site visit.
The minimum usable head height, measured from the floor joists to the ridge, is generally 2.2m for a Velux conversion. Most Victorian terraces in Chesterfield and the surrounding area meet this easily. If your loft is borderline, a dormer or hip-to-gable conversion can create the head height you need where a straight Velux conversion wouldn’t. We’ll measure up and tell you exactly what’s possible.
A Velux conversion typically takes 4–6 weeks on site. A dormer conversion is usually 6–10 weeks. Hip-to-gable and mansard conversions run 8–12 weeks depending on scope. Allow extra time upfront for structural drawings and Building Control approval. We’ll give you a full programme before we start.
Yes, an en-suite is the most popular addition to a loft conversion and we handle the plumbing in-house. We’ll assess the soil stack position and plan the layout to maximise what’s possible in the available space. Adding an en-suite adds cost but increases the value and usability of the converted space.
A Velux conversion adds rooflights flush with the existing roof slope, with no change to the roofline, lowest cost, fastest build. A dormer extends the roof slope outwards to create a box-shaped structure with vertical walls and a flat or low-pitch roof, giving a lot more usable floor area and full standing height throughout. If budget allows and the roof is suitable, a dormer almost always makes better use of the space.
Often goes hand in hand
Other Services We Handle on Loft Projects
Most loft conversions pull in one or more of these trades as part of the fit-out, and we carry them all in-house.
House Extensions
Expand outwards at ground level while you go upwards. Many clients combine a loft conversion with a rear extension for maximum space gain.
View service →Structural Work
Steel beam installation and structural alterations handled in-house, including the RSJ work required for most dormer and hip-to-gable conversions.
View service →Joinery & Carpentry
New staircase, fitted storage, skirting, architraves and doors. All our joinery is done in-house to the same standard as the structural work.
View service →Plastering
Skim coat and drylining throughout the converted space, finished flat and ready to decorate. No subcontractors, no scheduling gaps.
View service →
Ready to talk?
Let’s Come and Have a Look.
The first step with a loft conversion is a proper look at the space. Gaz will come out, check the head height and roof structure, and give you a straight answer on what type of conversion is possible and what it’s likely to cost, before any money changes hands. We cover Chesterfield, Sheffield, Dronfield and the wider Derbyshire area.