Rooflights and skylights in Royston

The ground itself sets Royston apart from the flatter fen and clay villages closer to Cambridge. The town sits on chalk hills, with Therfield Heath rising along its southern edge and the chalk cave cut beneath the crossroads, its walls carved by hand, a reminder of how close the bedrock comes to the surface here. Roofs on a hill town do not all face the same way for the same reasons a fen village's roofs do: here, the fall of the land and the older street pattern play as large a part as which way the original builder happened to lay the plot.

Two broad ages of housing make up most of Royston's roofline. Close to the crossroads and the station on the Cambridge line, Victorian and Edwardian terraces line streets built for a working market town, with long, narrow plots that leave the rear rooms short of daylight. Around them, estates built through the 1960s brought wider plots, gentler roof pitches and, in a lot of houses, a trussed roof rather than a traditional cut one. Which of the two you own changes the practical questions we ask on site, since the frame overhead, the paperwork involved and the room you are trying to brighten rarely match between a Victorian roof and a 1960s one. Across the wider rooflight and skylight installation we carry out around Cambridge, the method stays constant even where the housing does not: look hard at the room and the roof first, and only then choose the glass.

That fact draws a hard line under sizing. Slot a roof window between two trusses and no engineering follows, since the members either side stay untouched. Ask for anything wider, such as a roof lantern spanning a rear extension across more than one truss bay, and those members need trimming, with the new load path worked out by a structural engineer and signed off under Building Regulations before a single tile is lifted. That is why we get up into the loft before any size goes on paper, rather than sizing an opening to the room and hoping the roof agrees.

A number of houses on these estates have a bathroom or an internal hallway built without any window at all, lit by nothing but a switch since the day the house went up. A sun tunnel threads between the trusses with nothing to engineer, guiding daylight through a mirrored tube from a small dome set into the tiles, which is normally enough for a room of that size. Where a loft has become a bedroom or a home office instead, placing two narrower roof windows on either flank of a single truss, rather than cutting one wide gap, lights the room more evenly and leaves the structure alone.

This later housing is commonly roofed in a plain concrete tile, set at a shallower angle than the slate nearer town, though we measure the actual pitch on the day rather than assume it from the street, since a unit set below its rated minimum will not throw water off as it should.

None of that touches a listed building, which needs listed building consent for any change to a roof, rooflight included, whatever the size of the unit, and a conservation designation or an Article 4 direction can narrow that same allowance on a particular street. No assumption gets made about any specific Royston address either way. North Hertfordshire District Council keeps its own constraints record, and that is what a property gets checked against before the light plan takes shape, not the age or look of the house.

Building Regulations sit apart from planning permission entirely, and a rooflight will nearly always need that sign-off even on a job that needed no planning application at all. Thermal performance of the glass, the strength of the opening and, close to a boundary, how the roof covering behaves in a fire, all get assessed under that separate process. Our Building Regulations guide covers what gets checked, and Building Control makes the call on whether a job counts as notifiable. Where it does, that notification is ours to handle, not yours to chase.

Outside, we take a genuine compass reading of the slope in question, since a road climbing the hill toward the crossroads can point a different way from a road further along it, and we note whatever stands close enough to cast shade at particular hours: a neighbour's gable end, a garden wall cut into the rise, a mature hedge. Up in the loft or above the extension ceiling, we look for trusses or old hand-cut rafters, measure the pitch that is actually there, and record the roof covering so the flashing detail is settled before anything is ordered. Where a listed building or a conservation designation could apply, the address gets checked against North Hertfordshire District Council's own planning record before the light plan is drawn up, not guessed at from the street.

• Where the unit goes, its size and its type, set against the room and the slope beneath it
• The glass specification and any shading the orientation genuinely needs
• How the structure gets handled, including engineer input wherever trusses are in the way
• Whether Building Control counts the work as notifiable, and who deals with that notification

That detail becomes a written light plan attached to the quote, so every line of the price traces back to a specific decision rather than sitting as one lump sum. Our costs guide explains the general factors that move that figure, and every job carries a 10-year workmanship guarantee whichever part of Royston it sits in. Owners just to the south might find our Bassingbourn page useful too, and the Baldock page covers the next town along the same North Hertfordshire road. To get a visit arranged, book a light survey here or send a message on WhatsApp, or look through the fuller list of areas we cover around Cambridge.