Bespoke loft conversions across Maidstone, designed and built by our own in-house team. One fixed written price, a ten year guarantee, and a free design survey at your door.
In short: as the county town, Maidstone has everything from Victorian terraces to large interwar and post-war estates, and the roof you own decides the conversion you can have. A hip to gable suits the hipped semis that fill much of the town, a dormer or L-shape suits the older terraces, and a Velux suits a roof that already has the height. A dormer or hip to gable typically costs £50,000 to £75,000 and takes six to eight weeks on site. Our own team builds every one, for a fixed written price and with a ten year guarantee.
Maidstone, the county town, grew up along the River Medway, and it is not one kind of street, which is the first thing a survey settles. Much of the town is interwar and post-war semis, especially out through Shepway, Allington and Penenden Heath, and almost all of them were built with a hipped side roof that slopes away on three sides and wastes the end of the loft. The room really only appears once that hip is built up square into a gable, usually with a rear dormer added across the back, which is why a hip to gable is the build we do most often here.
Closer in, the Victorian and Edwardian terraces around the town centre and the Loose Road end tend to run deep with a rear back addition, and that is what opens up an L-shape conversion, giving a main bedroom and an en-suite rather than a single boxy room. Out towards Bearsted and Boxley the larger detached and period homes often already have the head height for a straightforward dormer, or a set of rooflights that leaves the outside untouched.
| Your roof | Best conversion | Common in |
|---|---|---|
| Hipped roof, slopes on three sides | Hip to gable, usually with a rear dormer | Interwar and post-war semis in Shepway, Allington and Penenden Heath |
| Terrace or semi with a rear back addition | L-shape dormer | Victorian and Edwardian homes around the town centre and Loose Road |
| Straight pitched rear roof with head height | Rear dormer | Most Maidstone semis and detached houses |
| Plenty of head height, want the outside untouched | Velux or rooflight | Larger period and detached homes around Bearsted and Boxley |
Price follows the roof, the size and the finish, not the postcode, so the figures below are our site-wide indicative ranges, also on the costs guide with an instant estimator. Because the town leans towards hipped semis, most Maidstone jobs are hip to gable and dormer builds that land in the middle of the table.
| Conversion type | Indicative cost (plus VAT) |
|---|---|
| Velux | £35,000 to £50,000 |
| Dormer | £50,000 to £65,000 |
| Hip to gable | £58,000 to £75,000 |
| L-shape | £65,000 to £90,000 |
| New build loft | £45,000 to £70,000 |
What moves your own figure is mostly the roof itself. A hipped interwar roof needs more structural work than a straight gable end, so it costs more than a simple dormer. Adding an en-suite brings in plumbing, which lifts the price but adds the most resale value. Where the new staircase can land sometimes changes the layout and the build, and the fittings you choose, standard or higher specification, set the final number. Whatever the mix, the quote we give after the survey is fixed and itemised, with staged payments through the build, so nothing is added at the end.
For most Maidstone homeowners the sums work. Nationwide has valued the uplift from adding a bedroom and a bathroom at around 20% of a property’s value. Set against a median ME14 sold price of about £320,000 (HM Land Registry, mid-2026), that is roughly £60,000 of added value, close to what the work itself costs, with a permanent extra bedroom on top and none of the stamp duty or agent fees of moving. Our guide to how much value a loft conversion adds covers it in full. The loft is usually the cheapest square footage in the house to bring into use, because the structure is already there.
We would rather show you finished rooms than stock photography. We have no Maidstone case study to publish yet, so these are documented projects from across our Kent and south east London patch, on the kind of housing you also see around Maidstone. Ask on the survey and we will walk you through the ones closest to your own house.
Loft extension, Greenwich A loft reworked into a bright, comfortable room that adds real space to a period home. View project → 
Master bedroom and en-suite, Bromley A loft turned into a master bedroom with its own en-suite, the landing opened up to keep it generous. View project → 
Loft master suite A master bedroom built into the roof with a slatted feature wall and built-in lighting, the kind of finish a Maidstone loft can take. View project → There are more finished rooms in our gallery.
Maidstone has more loft specialists than most Kent towns, which is good for you as long as you compare them on the same terms. Four questions sort a safe choice from a risky one. Is the price fixed and itemised in writing, with no provisional sums that grow later? Are the people on your roof employed by the firm or subcontracted out? Is building control sign-off part of the job, or left for you to chase? And what, in writing, does the guarantee actually cover?
Our answers are the same every time: one written price before anyone starts, our own employed tradespeople on site, building control handled by us as part of the fee, and a ten year written guarantee on the finished work. One named project manager runs the whole job, from the first survey to the completion certificate, and you have their direct number throughout.
Applications go to Maidstone Borough Council, but most house conversions never need one. A rear dormer or hip to gable usually sits inside permitted development, provided the house has not already used its allowance and the design stays within the size limits. The exceptions are worth checking early: homes in the Town Centre, Loose and Bearsted conservation areas often lose their roof permitted-development rights, and listed buildings, flats, maisonettes and anything that alters the front roof slope need a full application wherever they are. We settle which applies to your address on the survey and handle the submission if one is required. Our planning guide and building regulations guide set out the detail.
Building control is a separate approval that applies to every conversion, permitted development or not. It signs off the new floor structure, the escape route and fire doors, the stair head height and the insulation, and we carry the calculations, drawings and sign-off as part of the price.
It starts with a free design survey at the house, where we measure the roof and tell you plainly what it will and will not take. You then get drawings and one fixed written price, with no obligation to go further. If you do, we clear any planning and the building control approvals first, which is the two to four weeks before the build, then our own team is on site for six to eight weeks on a typical dormer or hip to gable. It finishes with the building control certificate and your ten year written guarantee. If the roof genuinely will not work, we tell you on day one rather than at the quote.
We build right across the county with our own team. Near Maidstone we also cover Sevenoaks, Tonbridge, Tunbridge Wells and the Medway towns of Rochester and Chatham. Every town is on our loft conversions across Kent page, with the wider patch on the areas we cover page.
In most cases no. A rear dormer or a hip to gable on a normal house in Maidstone is usually permitted development, which skips the planning queue. You do need a full application to Maidstone Borough Council if your home is in a conservation area such as the Town Centre, Loose or Bearsted, if it is listed, if it is a flat or maisonette, or if the work changes the front roof slope. We confirm which applies to your street on the survey and deal with the paperwork if an application is needed.
The figure comes down to the roof and the finish rather than the postcode. A Velux conversion starts around £35,000, a dormer runs £50,000 to £65,000, and a hip to gable, the common choice on Maidstone’s interwar semis, runs £58,000 to £75,000. Those are the same ranges on our costs estimator, and your own number is fixed in writing once we have surveyed the roof.
On site, most Maidstone conversions take six to eight weeks. A straightforward Velux is quicker at three to five weeks, and a bigger dormer or L-shape can run to twelve. Before any of that, allow two to four weeks for the drawings and approvals. You get the full timeline with your written quote, so there are no surprises.
Maidstone has several established loft specialists, so it pays to compare like for like. Ask whether the price is fixed and itemised in writing, whether the people on site are employed by the company or subcontracted, whether building control sign-off is included, and what the written guarantee actually covers. We put all of that in writing up front and give you one project manager from the first visit to the final certificate.
Usually not. The design, the drawings and the structural calculations are done by our own team as part of the job, so a standard dormer or hip to gable in Maidstone does not need a separate architect. If your conversion needs a full planning application, we prepare and submit it for you.
Interwar and post-war semis in areas like Shepway, Allington and Penenden Heath nearly always have a hipped roof. The usable room appears once that hip is built up into a vertical gable, normally with a rear dormer added, so a hip to gable is the answer on most of them. We confirm the head height and staircase position on the survey before we commit to a design.
A Velux or rooflight conversion, from around £35,000, because it uses the roof shape as it is and changes nothing outside. A dormer or hip to gable costs more because it rebuilds part of the roof to add floor area and standing height, which is also why it tends to add more value.
For most homeowners, yes. Nationwide has valued the uplift from a new bedroom and bathroom at around 20% of a property’s value. Against a median ME14 sold price of about £320,000 (HM Land Registry, mid-2026), that is roughly £60,000, close to what the work costs, and you keep the garden and avoid the cost of moving.
Our own team does the work, start to finish. We work out of 5B Hawes Road in Bromley and reach Maidstone down the M20, and the surveyor who prices your roof is part of the crew that builds it. Nothing is subcontracted, which is how the ten year written guarantee stands behind every job.
Thinking about the loft on a Maidstone home? Book a free design survey. We measure the roof, tell you honestly what it will take, and hand you one fixed written price with no obligation.
We cover Maidstone and the surrounding area with our own team. Call 0800 028 0099 or use our contact page.
Book a free, no-obligation design visit. We will tell you what your roof allows, show you what it could look like, and give you a fixed price. No pressure, no jargon.
A short conversation about the house and what you are hoping to do. No sales pitch.
We measure up and tell you honestly what your roof allows, what it would look like, and what it involves.
Itemised, with no hidden extras, and a ten-year written guarantee on the finished work.
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