Short answer: Yes. Most terraced houses can take solar panels, and they are usually permitted development, the same as any other house. The main questions are roof space, shade from chimneys and neighbouring extensions, and which way the roof faces. In Birmingham, where 27.8% of homes are terraced, a survey of the front and back slopes decides the best layout.
Terraces are a big part of Birmingham’s housing
The 2021 Census recorded 27.8% of Birmingham homes as terraced houses, second only to semis at 35.6%. So a lot of the city’s roofs are narrow, shared-wall roofs in long straight streets, and most of them can take solar panels.
Planning is the same as any other house
A terraced house has the same permitted development rights as a semi or a detached house. The rules allow roof panels that stand no more than 0.2 metres beyond the roof slope and stay below the highest part of the roof, not counting chimneys. The checks that matter are whether the house is listed and whether the street is in one of Birmingham’s 29 conservation areas. Do solar panels need planning permission in Birmingham? covers both.
Roof space
A terrace roof is narrow, so the width of the slope sets how many panels fit in a row. Chimney stacks, roof windows and soil vent pipes take space too. The Energy Saving Trust says an average home system uses about 12 panels and 20 to 30 square metres of roof. Many terraces have less than that on one slope, so smaller systems are common, and there is nothing wrong with that. A 3 kWp system on a south-facing Birmingham roof would still make about 2,910 kWh a year, according to PVGIS figures of 969 kWh per kWp.
Front, back and the back extension
In a straight terraced street, the front and back slopes face opposite ways. If one faces south, that is usually the slope to use. If the street runs north to south, the slopes face east and west. PVGIS gives an east or west-facing Birmingham roof about 777 kWh per kWp, and panels on both slopes spread generation across the day.
Many terraces also have a back extension, sometimes called an outrigger, with its own pitched or flat roof. It can add space for panels. On a flat roof, the panels can be tilted on frames as long as they stay within 0.6 metres of the highest part of the roof.
Shade from chimneys and neighbours
Shade is the main challenge on a terrace. Chimney stacks cast a moving shadow across the slope during the day, and a neighbour’s taller extension can shade a back roof in the afternoon. In a simple system, shade on one panel drags down the output of the others wired with it. Panel optimisers, or a layout that keeps panels out of the worst shade, limit that loss. The survey should look at where shadows fall at different times of day, not just the size of the roof.
Scaffolding and access
A terrace has no side access, so scaffolding usually goes up at the front, on the pavement, or at the back through the garden or an alleyway. Scaffolding on the pavement may need the council’s permission, and the installer should arrange it. Tell your neighbours before the work starts.
Where a battery goes
The Energy Saving Trust says a typical home battery is about 100 by 60 by 25 centimetres. In a terrace, common places are the loft, under the stairs or a cupboard near the consumer unit, following the manufacturer’s rules on location. Solar battery storage covers sizing.
Bottom line
A terraced house can usually take solar panels. The survey should look at both roof slopes, chimneys, the back extension and any conservation area before suggesting a layout. If the roof is small or shaded, a smaller system with optimisers can still be worthwhile. Our quotes are free. Call 0121 330 1151, 9am to 7pm, 7 days.