Listed Building Repairs & Restoration

Something on your listed building needs attention, and the advice you have been given does not agree with itself. That is the normal starting position, and it is usually because the people giving it are answering different questions — one is looking at the damage, one is looking at the law, and neither is looking at the cause.

B&S Restoration carries out listed building repairs and heritage restoration across Dorset — brick, stone, cob, lime plaster and render, timber, chimneys and roofs. We are based in Blandford Forum. The survey and the written quotation are free, and this page is what we would tell you on the first visit.

Start with a survey, not a quote

The single most expensive mistake on a historic building is pricing the repair before anyone has established why the damage is there.

A listed building survey should diagnose, not describe. “Spalling brickwork on the south elevation” is a description. “Spalling brickwork on the south elevation because it was repointed in cement in the 1980s and the moisture now leaves through the brick face instead of the joint” is a diagnosis — and only one of those tells you what to do, or what it will cost.

Three things a useful survey settles before anyone prices anything:

Where the water is coming from. Gutters, downpipes, flashings, ground levels, a failed coping. Almost every defect on an old building is downstream of one of those.
What the building is actually made of. Solid brick, rubble stone, cob, timber frame — and what previous repairs have added on top, which is frequently the problem rather than the fabric.
Which of it needs consent. Establishing that early is the difference between a project and an enforcement problem.

There is a separate question of whether you need a structural survey, and the honest answer is: only if something is moving. Cracking that is old, stable and filled with successive generations of paint is not the same as cracking with clean edges. A conservation-accredited surveyor or structural engineer is worth the fee where there is genuine movement, and worth nothing where there is not.

Like-for-like repair, and where the line sits

Most owners want one number: do I need consent or not. The honest answer has a shape rather than a number, but the shape is learnable.

Like-for-like repair generally does not need listed building consent. Repointing in a matching lime mortar. Replacing broken slates with the same slate. Splicing a rotten cill in matching timber. Reglazing a broken pane. These preserve both the fabric and the appearance, and they are maintenance.

Anything that changes character, appearance, layout or historic fabric generally does. Different windows, a different render, a new opening, removed partitions, internal damp-proofing, a stove and its flue.

The trap is the middle: work an owner sincerely thinks of as a repair, which the authority sees as an alteration. Replacing a rotten timber window with a uPVC one is a replacement, not a repair, however rotten the original was. Rendering over damaged brick is an alteration. Stripping paint back to bare stone changes the appearance. If you cannot tell which side of the line you are on, that uncertainty is itself the answer — ask first. Our note on whether repairs need listed building consent goes through it case by case, and what the grades mean for repairs covers how much scrutiny to expect.

Two things people are routinely caught out by. The inside is listed too — listing is not a facade protection, and internal walls, staircases, plaster, joinery and fireplaces are all covered. And so is the curtilage: garden walls, outbuildings, steps, piers and railings that were there before 1 July 1948 are generally treated as part of the listed building.

Materials, element by element

“Use traditional materials” is the right principle and too vague to act on. What it means in practice depends on which part of the building you are standing in front of.

Brickwork and mortar. Lime mortar, matched to the brick rather than to a bag. Cement is harder than soft handmade brick, so the water that used to leave through the joint leaves through the brick face instead and the face spalls. See repointing and brickwork.
Stone. Patch repair and like-for-like replacement before rebuilding. Matching the stone type matters, and so does matching the tooling and the joint profile — a correct stone finished wrong still reads as new. See stonework.
Timber. Splice rather than replace. Cut back to sound wood and joint new timber in, matching species and section; old timber is slow-grown and denser than anything you can buy today. See woodwork.
Roofing. Salvage and relay the original slates or tiles where they are sound — a roof covering is usually the largest single area of historic material on a building, and stripping it wholesale throws away more fabric than any other repair. Where replacement is unavoidable, match the material, the profile, the size and the laying pattern, not just the colour. Re-roofing a listed building normally needs consent even where the covering is being replaced like for like, because the battens, felt and detailing underneath rarely are. Leadwork at valleys, flashings and soakers is repaired in lead, not in a proprietary tape.
Plaster and internal finishes. Lime plaster and breathable paint on solid walls. Gypsum and vinyl emulsion seal a wall that was built to dry outwards. Lath and plaster ceilings are re-keyed from above where the nibs have sheared, rather than pulled down. See plastering.
Chimneys. Rebuilt in matched brick or stone above the roofline where the stack has weathered, with new flaunching and lead flashing renewed at the junction. Fitting a stove in a listed building usually needs consent in its own right, and the flue route, hearth and opening all have to suit the original fabric rather than the other way round — see chimney repairs and log burner installation.

Underneath all of it is one rule. An old building has no cavity and usually no damp course; it works by taking moisture in and letting it back out again. Every material choice either allows that or interferes with it, and interfering with it is what causes most of the damage we are called to undo. There is more in our note on lime plaster, lime render and breathable materials, and on damp in listed and period properties.

How to plan the work

The order matters more than people expect, and getting it wrong is how the same repair gets paid for twice.

Stop the water first. Roof, gutters, downpipes, flashings, ground levels. Repairing the symptom while the cause is still running is money spent twice.
Separate urgent from cosmetic. Work that arrests decay comes before work that improves appearance, even when the appearance is what is bothering you.
Let it dry before you close it up. A wall that has been wet for years does not dry in a fortnight, and plastering over it just moves the problem behind the finish.
Talk to the conservation officer early. A pre-application conversation costs nothing and is far cheaper than a refused application or an enforcement notice.
Specify the materials before pricing. “Repoint the gable” and “repoint the gable in a matched lime mortar, raked to twice the joint width, cut by hand” are different jobs at different prices, and only one of them can be compared fairly between quotes.
Keep a record as you go. Photographs before, during and after. If something unexpected turns up behind the plaster, that record is what the consent conversation is built on — and a buyer’s solicitor will want it eventually.

One seasonal note worth planning around: lime will not go on in frost and needs protecting while it cures, so lime work runs roughly April to October in Dorset. A programme that ignores that is a programme that will disappoint someone. Survey in late spring, after the winter has shown you what it was going to.

What listed building repairs cost, and what moves the figure

Repairs to a listed building are priced against a survey and a phased programme, not against a walk round, so anyone quoting a rate down the phone is guessing. What is worth knowing in advance is which variables actually move the number, because they are rarely the ones people expect.

Access. Scaffolding a three-storey elevation over a conservatory costs more than the repair standing on it. On chimneys and roofs, access is routinely the largest single line.
How much has to come off before anything goes back on. Raking out cement pointing by hand is slow, skilled and unavoidable, and it is invisible in the finished photograph.
Whether materials have to be matched. Reclaimed brick, a specific stone, a matching slate or a hand-made tile all carry a premium and a lead time.
What is found once it is opened up. Allow a contingency of 10 to 20 per cent, at the higher end where the building is rendered, boarded or otherwise hiding its condition.
The approval stages. Not a cost so much as a duration, but a programme that has to pause for a decision costs money in standing time.

The gap between a cheap quote and a sound one is almost always in the preparation, which is exactly the part you cannot see afterwards. That is why we quote against a written specification naming the mixes and the methods, not just the areas — so you can compare two prices for the same job rather than two prices for different ones.

Grants, VAT and insurance

Three questions we are asked constantly, and where most of what you will read online is out of date.

Grants

There is no general grant for repairing a Grade II listed house, which is the disappointing but honest answer for most owners. Historic England’s grant programmes are targeted principally at buildings at risk and at the higher grades. What does exist, and is worth checking: local authority and parish schemes, conservation area grant schemes where one is running, and specific funds for places of worship. Dorset Council’s conservation team is the right first call — schemes open and close, and any list published online goes stale quickly.

VAT

This is the one where old advice does real damage. The zero rate for approved alterations to listed dwellings was withdrawn on 1 October 2012. Plenty of pages still online say otherwise; they are describing a relief that no longer exists. Repairs and maintenance have always been standard-rated. The reduced rate that may still apply is for dwellings that have been empty for two years or more, and for certain conversions, and it applies to the property’s condition rather than to its listing. Places of worship are a separate case with their own scheme. Take the current position from HMRC or your accountant rather than from a builder — us included.

Insurance

A listed building generally needs specialist cover rather than a standard household policy, and the reason is the reinstatement basis: you are insuring the cost of rebuilding in matching materials, by trades who can work in them, under consent. That is a different and usually much larger figure than a conventional rebuild cost, and a policy written on the ordinary basis will be short when it matters. Insurers will also want to see that the building is being maintained — which is one practical argument for keeping the photographic record above, and for having a survey on file.

When the council serves a notice

If a notice has landed on your mat, this is the section you came for. The powers are real, they are used, and they have names worth knowing.

Listed building enforcement notice. Served where work has been done without consent. It can require the building to be put back as it was. Unlike ordinary planning enforcement there is no time limit — unauthorised work from decades ago is still actionable, which is why it surfaces in searches when a house is sold.
Urgent works notice. Allows the authority to carry out works needed to preserve a building — normally one that is unoccupied, or an unoccupied part — and then recover the cost from the owner.
Repairs notice. The serious one. It specifies the works reasonably necessary for the proper preservation of the building. If it is not complied with, the authority can begin compulsory purchase proceedings. It is rare, and it is not a bluff.

Underneath all three sits the basic position: carrying out unauthorised works to a listed building is a criminal offence, not a planning irregularity. Prosecutions are uncommon but they happen, and the liability attaches to the building rather than dissolving on sale.

None of that is a reason to panic. In practice, conservation officers would far rather have a conversation than serve anything, and an owner who comes forward with a survey, a method statement and a programme is in a completely different position from one who does not respond. If you have inherited work you are unsure about, establishing where you stand early is always cheaper than discovering it at the point of sale. We are happy to look at it and say plainly what we think, and this is general guidance rather than legal advice — on anything contentious, take it.

Who else is involved

On anything beyond straightforward repair, the work is a team rather than one contractor:

Conservation-accredited architects and surveyors prepare specifications, manage consent applications and oversee complex work.
Structural engineers where load-bearing elements are affected — and a sympathetic structural solution is not the same as a conventional one.
Traditional trades — masons working in lime, joiners cutting historic profiles, thatchers, slaters and leadworkers.
The local conservation officer, who both advises and determines the application, which is a good reason to involve them before you have committed to a design.

We are used to working inside that arrangement: pricing from drawings, feeding back on buildability and materials early, preparing method statements, and dealing with the conservation officer directly where it helps. Early involvement is consistently cheaper than late involvement. If you are still choosing who to appoint, our note on choosing a listed building restoration company covers what to ask.

Repairs in Dorset: what is different here

Dorset has a large stock of Grade II listed housing and a lot of local variation inside it, which is why a contractor who works on these buildings weekly is a different proposition from one who meets them occasionally.

The coast weathers everything faster. Salt-laden air at Weymouth, Swanage, Lyme Regis and Bridport attacks leadwork, ironwork and the softer stones noticeably harder than ten miles inland.
The geology changes the walls. Chalk, greensand, Purbeck and Portland all behave differently, and so do the mortars that suit them. A mix that is right in Sherborne is not automatically right in Wareham.
Cob is its own discipline. Earth walls fail differently from masonry, dry differently, and are ruined outright by cement. See cob work.
Thatch, flint and banded brick are all common in the Wessex vernacular and all easy to get wrong in a way that is obvious to everyone who lives there.

We work across the county — Blandford Forum, Dorchester, Wimborne, Poole, Bournemouth, Ferndown, Shaftesbury, Sturminster Newton, Sherborne, Wareham, Swanage, Bridport, Lyme Regis, Gillingham and the villages between them. Useful references while you are planning: Dorset Council’s conservation and listed buildings pages, Historic England’s technical advice library, and the Listed Property Owners Club. You can also check what is actually listed, and what the entry says, on the listed property register.

FAQs About Listed Building Repairs in Dorset

Clear answers to your listed building repairs in Dorset—helping you make informed decisions with trusted guidance.

What counts as a repair rather than an alteration?

A repair is like-for-like work that preserves existing fabric and appearance — repointing in a matching lime mortar, replacing broken slates with the same slate. An alteration changes the character, appearance or layout, and that is what usually needs listed building consent. If you cannot tell which you have, that itself is the answer: ask before you start.

Does routine maintenance need consent?

Often not. Maintenance that changes neither the appearance nor the historic fabric generally does not, but plenty of things people think of as maintenance do — anything affecting a significant feature, a structural element or the external appearance. Confirming it with the local authority beforehand takes a phone call. Undoing unauthorised work does not.

Do I need a survey before getting quotes?

On anything beyond a single obvious defect, yes — and it will save you money rather than cost it. Without a survey you are asking three contractors to price three different guesses at the same building, and the cheapest will usually be the one who has understood the least. Our survey and written quotation are free.

Why lime mortar rather than cement?

Lime is softer and more permeable than the brick or stone around it, so it accommodates movement and lets moisture evaporate out of the joint. Cement is harder and much less permeable, which means the moisture leaves through the masonry face instead and takes the face with it. Matching the original mix and the joint profile is what keeps a historic wall healthy.

Can I re-roof a listed building?

Usually yes, and it usually needs consent. Even a like-for-like recovering normally involves changes underneath — battens, breathable membrane, insulation, sometimes the detailing at eaves and verges — and those are what the application is really about. Salvaging and relaying sound original slates or tiles, rather than stripping and replacing wholesale, is both the conservation answer and frequently the cheaper one.

Is there a grant for repairing a listed building?

For most Grade II houses, no — there is no general repair grant, and that is worth knowing before you budget around one. Targeted funding does exist for buildings at risk, for higher grades, for places of worship, and occasionally through local or conservation area schemes. Dorset Council’s conservation team is the right place to ask, because schemes open and close faster than any published list keeps up with.

Can I claim VAT back on listed building repairs?

Not on repairs, no. The zero rate for approved alterations to listed dwellings was withdrawn on 1 October 2012, and repairs and maintenance were standard-rated even before that. A reduced rate can apply to homes empty for two years or more and to some conversions, but that follows the property’s condition rather than its listing. A lot of advice still online describes the pre-2012 position — check the current rules with HMRC or your accountant.

Do I need special insurance for a listed building?

Generally yes. A standard policy is written against a conventional rebuild cost; a listed building has to be reinstated in matching materials by trades who can work in them, under consent, which is a substantially larger figure. Specialist insurers understand that, and will usually also want evidence that the building is being maintained.

What is a repairs notice?

It is a formal notice from the local authority specifying the works reasonably necessary to properly preserve a listed building. If it is not complied with, the authority can begin compulsory purchase proceedings. It is rare and it is a last resort, but it is a genuine power rather than a threat.

What happens if work was done without consent before I bought the house?

The liability runs with the building, not with whoever did it, and there is no time limit on listed building enforcement. That sounds worse than it usually is in practice: the common outcome is a retrospective application, or an agreed scheme to put right what matters most. What does not work is hoping it will not come up — it surfaces reliably in the buyer’s searches next time the house is sold.

When is the best time of year for repairs?

Survey in late spring, once the winter has shown you where the water gets in. Do the lime work between roughly April and October, because it cannot be laid in frost and needs protecting while it cures. Roof and gutter work is worth doing before winter rather than after it, for obvious reasons.

Can a listed building be made warmer?

Usually yes, and carefully. Draught-proofing, secondary glazing, loft insulation and repairing the windows you already have will do more than most people expect, and rarely need consent. What causes damage is wrapping a breathable wall in impermeable insulation, which traps moisture in the fabric. Fix the water first, then the draughts, then consider anything else.

How do I choose a contractor for listed building repairs?

Ask for work on comparable buildings, and ask specifically how they would do it rather than what it would cost. What mortar mix, raked to what depth, cut by hand or with a grinder. Someone who repairs historic fabric for a living will have an immediate answer to all three. On complex work, appointing a conservation-accredited architect or surveyor to manage the project is money well spent.

Do you work with conservation officers and architects?

Yes, routinely, and on anything substantial it is the sensible route. We will price from drawings, feed back on materials and buildability early, prepare method statements and heritage information where that helps, and deal with the conservation officer directly. Bringing everyone in early is consistently cheaper than bringing them in late.

Talk to us about your listed building

If something on a listed or historic building in Dorset needs attention, the most useful first step is for someone to come and look at it. The visit and the written quotation are free, and you will get a plain account of what is causing the damage, what needs consent, and what order to do it in — whether or not you use us for the work. Get in touch to arrange a visit, or read more about us first.

Listed Building Repairs and Restoration in Dorset