Ranshaw Group · Grantham, Lincolnshire
Builders in Grantham:Extensions, New Builds& Groundworks
Plan your Grantham extension, new build or commercial project with one team handling design, groundworks and construction — with each job quoted individually.
Get a Free QuoteFree site visit · No obligation · 18-month workmanship guarantee
Areas we cover
Building in Grantham
Grantham sits in the south-west of Lincolnshire, close to the A1 and on the East Coast Main Line, and it is one of the core towns we cover. Its housing mixes Victorian and Edwardian terraces near the town centre with inter-war and post-war semis and a large amount of newer estate housing on the edges of town.
Our services available in Grantham include extensions to growing family homes, new builds on infill or edge-of-town plots, groundworks, driveways and commercial work for local businesses. Good road links make the town a practical base for businesses, so we also discuss commercial construction where staged payments may need to follow development loans or lender schedules.
We offer free, no-obligation initial site visits for Grantham projects and quote each job individually. We cover Grantham alongside nearby villages such as Barrowby and the wider South Kesteven area. A typical response or travel time to Grantham has not been provided, and jobs completed in the town have not been supplied, so we won't claim either — we'll simply tell you our real availability when you call.
Services in Grantham
Design and build across all trades
HMO Conversions
Shared-accommodation conversions in Grantham, with design, planning applications and building control managed where required.
Learn moreNew Builds & Extensions
Extra space or a new home in Grantham, planned from foundations to finishes by one team.
Learn moreCommercial Construction
Business premises in and around Grantham, with staged payments that can follow lender schedules.
Learn moreFarm Buildings & Stables
Agricultural buildings, stables and outbuildings for working sites near Grantham.
Learn moreLandscaping & Driveways
Driveways and hard landscaping in Grantham, with ground preparation and runoff planned first.
Learn moreSeptic Tanks & Drainage
Septic tank and drainage installs for Grantham properties, with help on Environment Agency compliance and permits.
Learn moreGroundworks
Excavation, foundations and site preparation in Grantham — our core trade.
Learn moreDesign & Build
Full design-and-build capability for Grantham projects, across trades from groundworks to completion.
Learn morePlanning & Building Control Management
Planning applications and building control managed for Grantham projects where they are needed.
Learn moreWhy choose us in Grantham
Facts you can check, not slogans
40+ years combined experience
Our core team brings over 40 years of combined experience across every construction trade to projects in Grantham and the rest of Lincolnshire. That is the team's experience, not the company's trading history: Ranshaw Group has been trading for more than two years.
£10m public liability insurance
We hold £10,000,000 public liability insurance for our construction business. We hold no trade-body accreditations, and we don't display badges or memberships we don't have.
18-month workmanship guarantee
All works carry our 18-month workmanship guarantee, and we match manufacturer product warranties. Ask about the guarantee terms and manufacturer warranties applicable to your project.
A team that scales to the job
A core team of 10 tradespeople and labourers, scaling up to 24 operatives depending on project size. Jobs completed in Grantham: Not Provided. Typical travel or response time to Grantham: Not Provided.
Know before you build
Common building issues in Grantham
Clay and variable ground
The soil beneath a Grantham plot needs checking rather than guessing from neighbouring sites. If clay is present, its behaviour and nearby trees may influence foundation decisions. Foundation design depends on what is actually under the site and nearby trees, not a depth copied from the neighbour's extension.
Newer estates with tight boundaries
Many Grantham homes sit on modern estates with compact plots, shared drainage and close neighbours. Extensions here need early checks on boundaries, drainage runs and whether permitted development applies or estate restrictions remove it.
Older town-centre properties
Terraces near the centre often have limited access, older drainage and solid walls. Getting materials and machinery to the back of a terrace is a real part of the scope, and should be in the quote, not discovered on day one.
Conditions vary by property. Check Environment Agency flood information and confirm planning requirements with the relevant local authority before relying on general area guidance.
Planning your project
Getting a Grantham project ready to build
Start with the result you need
Before any drawings or prices, be clear about what the finished project must do for you. For a Grantham home that might mean a larger kitchen, an extra bedroom or somewhere to park off the road. For a business or farm it might mean storage, vehicle access or space for staff. Writing down the essential requirements, the nice-to-haves and any fixed dates gives the free site visit a useful starting point and keeps later design decisions tied to the outcome rather than appearance alone.
Gather what you already have
Existing information can save time and avoid repeated work. Useful items include title plans, previous planning decisions, building control completion records, drainage plans, surveys and photographs of earlier alterations. If your Grantham property has been extended before, records of that work help show what is already there and what the planning position may be. Missing information is not a problem in itself, but identifying it early means any investigation can be agreed before the scope is priced.
Check approvals before you commit
Planning permission, building regulations, HMO licensing and drainage permits are separate questions. One does not answer the others, and none should be assumed from a neighbour's project. Ranshaw Group manages planning applications and building control where required, but decisions remain with the relevant authorities. For a Grantham project, checking the route before booking construction reduces the risk of designs needing revision or work stopping while an approval issue is resolved.
Compare quotes by scope, not total
Two prices for the same Grantham project can cover very different work. Look at what each quotation includes: groundworks, drainage, removal of existing material, approvals management, finishes and any client-supplied items. Ask how changes will be agreed and when payments fall due. We offer free initial site visits and quote each job individually, with standard domestic payments staged so the final 5% is due on sign-off. A clear written scope is the most reliable basis for comparing builders.
Living and working nearby during the build
Building work affects the people around it. Before a Grantham project starts, think about parking for deliveries and trades, where materials can be stored, whether neighbours should be told about the programme, and which rooms or areas must stay usable. For an occupied home or a working business, agree access and any temporary arrangements in advance. These practical details do not appear on a drawing, but discussing them before the start date makes the construction period far more predictable for everyone involved.
Our process
A clear route from first visit to sign-off
- 01
Free site visit
We come to the property, look at the site, access and existing buildings, and talk through what you want to achieve. Bring any drawings, surveys or previous approvals you have. The visit is free and carries no obligation, and it tells us what further information is needed before a meaningful quotation can be prepared.
- 02
Design & approvals
Where the project needs it, we develop the design and manage planning applications and building control. Authority decisions are not guaranteed. The approval route, supporting information and any effect on construction dates need to be established for the individual project.
- 03
Individual quotation
Every job is quoted individually — there are no fixed prices. Domestic payments are staged: 10% deposit on booking, 40% two weeks before the start date, 45% through the project and 5% on sign-off. Commercial staging can be adapted to development loans or lender schedules.
- 04
Coordinated construction
Groundworks, structure, services and finishes follow a sequence that matches the design and the required inspections. Our design-and-build capability covers all trades from groundworks to completion. The work and responsibilities need to be agreed for the individual project.
- 05
Sign-off & guarantee
For standard domestic projects, the final 5% is payable upon sign-off. All works carry an 18-month workmanship guarantee, plus matching manufacturer product warranties. Ask about the applicable guarantee terms. Keep the product and approval records for future maintenance.
Grantham FAQs
Straight answers for Grantham
Do you serve Grantham?
Yes. Grantham is one of the Lincolnshire areas we cover, alongside Lincoln, Boston, Sleaford, North Hykeham and the other towns on our service-areas page. We're based at 10 Barnard House, LN4 2UT. Send us the site address and a short description of the work and we'll arrange a free initial visit.
How fast can you reach Grantham?
A typical response or travel time to Grantham has not been provided, so we don't promise one. Availability depends on the current programme of work. Call 07960 180466 during our hours — Monday to Saturday 6am–6pm, Sunday 8am–6pm — and we'll tell you honestly when a site visit can be arranged.
How much does building work cost in Grantham?
There are no fixed prices or published rates: every Grantham project is quoted individually, and free initial site visits are available. Access, ground conditions, specification and any approvals all affect the scope. Domestic payments are staged — 10% deposit, 40% two weeks before start, 45% during the work and 5% on sign-off — so you never pay the full amount up front.
Do you offer emergency call-outs in Grantham?
An emergency or out-of-hours service has not been provided, and we don't advertise one. We focus on planned construction projects. If there is an immediate danger to people or property, contact the appropriate emergency service first. For urgent but non-emergency work, call 07960 180466 to discuss availability.
Is work in Grantham guaranteed and insured?
Yes. All works carry our 18-month workmanship guarantee and we match manufacturer product warranties. We hold £10,000,000 public liability insurance. We do not currently hold trade-body accreditations such as FMB, CHAS or TrustMark, and we won't suggest otherwise.
Can you manage planning for a project in Grantham?
Yes. We manage planning applications and building control where your project requires them. Decisions sit with the relevant local authority, so we never promise approval or a decision date. The approval route should be checked for the individual project before work starts.
Do you take on commercial projects in Grantham?
Yes. We build for business clients in and around Grantham. Commercial projects are quoted individually, and staged payments can be adapted where you're working with a development loan or a lender's release schedule. Raise those requirements early so the payment stages and construction programme can be agreed together.
Will my Grantham extension need planning permission?
It depends on the property and proposal. Some extensions fall under permitted development, but estate conditions, previous additions or the property's location can change that, and building regulations apply separately. We manage planning and building control where required, without promising an outcome.
Nearby areas we cover
Free site visit · No obligation
Get a clear quote for your Grantham project
Tell us about the property and what you want to achieve. We offer free, no-obligation initial site visits and quote each job individually. Contact us to discuss availability.
£10m public liability insurance · 18-month workmanship guarantee