SMS Marketing for Home Improvement and Car Dealers: Two-Way Beats Broadcast

For home improvement firms and car dealers, two-way SMS beats broadcast SMS because the sale needs an appointment, and appointments come from conversations, not offers. A broadcast sends the same message to a list and hopes someone acts. A two-way text asks a real question about what the person enquired about, answers every reply and books the ones who are ready. Both have to follow the texting rules in your country.

This guide explains the difference, the UK and US rules at a general level, what to send, and the mistakes that waste a list. It is not legal advice.

At a glance

• Broadcast SMS suits short, time-bound news to people who opted in. Two-way SMS suits high-value sales that need an appointment
• In UK dealer data, text converted 14% of engaged leads to appointments against about 8% for email (Impel, vendor)
• In the UK, PECR treats texts as electronic mail: you need consent or the soft opt-in, and an opt-out in every message (ICO)
• In the US, marketing robotexts need prior express written consent under the TCPA, and business texting on 10-digit numbers needs A2P 10DLC registration
• Every reply needs an answer, fast, or the conversation dies

What is the difference between broadcast and two-way SMS marketing?

Broadcast SMS sends one message to many people and measures clicks. Two-way SMS starts individual conversations and measures replies and appointments. Most SMS marketing platforms are built for broadcasts, which is why many installers and dealers try SMS once and decide it does not work.

A £12,000 kitchen or a £30,000 car does not sell from a link in a text. It sells when someone has a conversation, gets their questions answered and agrees a time to visit.

Why does two-way SMS work for home improvement and car dealers?

Two-way SMS works because people read and reply to texts when it suits them, and a quick, relevant reply keeps the sale moving. Impel's UK dealer data for 2025 found about 60% of engagement happened by text, and that text converted 14% of engaged leads into appointments against about 8% for email. Impel is a vendor, so those are its own figures.

Home improvement works the same way. Homeowners who asked for a quote months ago will often reply to a short, personal text about that quote when they would not answer a call from an unknown number. Cloudy2Clear, a UK misted double glazing repair franchise, saw 4,321 of 6,769 old enquiries reply to SMS, a 64% reply rate, and booked 673 appointments. A five-site UK used car dealer saw 65% of 827 old leads reply, with 61 appointments. These are past results from specific campaigns, not forecasts.

What are the UK rules on SMS marketing?

In the UK, the Privacy and Electronic Communications Regulations (PECR) treat texts as electronic mail, so you must not send marketing texts to individuals without their specific consent unless the soft opt-in applies. You must also say who you are and give a simple way to opt out in every message.

The ICO's guidance says the soft opt-in lets you text someone if they are an existing customer who bought, or negotiated to buy, a similar product or service from you, and you gave them a simple way to opt out when you collected their details and in every message since. It does not cover bought-in lists or prospective customers who never dealt with you.

• Sole traders and some partnerships are treated as individuals under PECR.
• Keep a do-not-contact list and act on opt-outs promptly.
• The guidance is under review following the Data (Use and Access) Act, so check the ICO's current page before a campaign.

This is a general summary, not legal advice. If you are unsure how your leads were collected, take advice before texting them. Our trust and data page explains how Setterly handles data and opt-outs.

What are the US rules on SMS marketing?

In the US, the Telephone Consumer Protection Act (TCPA) requires prior express written consent before a business sends marketing texts using automated systems, and carriers require businesses texting from 10-digit numbers to register for A2P 10DLC. State laws can add further rules.

In January 2025, the Eleventh Circuit vacated the FCC's 'one-to-one' consent rule, according to law firm Kelley Drye, so the FCC's earlier prior express written consent standard remains in effect. Kelley Drye also notes that carriers, texting platforms and partners may impose their own stricter requirements by contract.

Twilio explains that anyone sending application-to-person texts to US numbers over a 10-digit long code must register a brand, so carriers know the sender is legitimate, and a campaign describing how people opt in, opt out and get help. Unregistered traffic faces extra carrier fees and more filtering. Again, this is general information, not legal advice.

What should a two-way SMS say?

A good first text is short, names the person and what they enquired about, comes from a named person at your business and asks one easy question. These are example templates, not real conversations.

Home improvement example: Hi Sarah, it's Tom from [your business]. You asked us about replacing your front door back in March. Is that still something you're thinking about? Reply STOP to opt out.

Car dealer example: Hi James, it's Priya at [your dealership]. You enquired about the 2022 Golf a few weeks ago. Are you still looking, or did you find something? Reply STOP to opt out.

If they reply, answer the question they asked, then offer two specific times. If they say not now, ask when would be better and follow up then. If they opt out, stop immediately.

When does broadcast SMS still make sense?

Broadcast SMS still makes sense for short, time-bound messages to people who have opted in: event invitations, open weekends, appointment reminders, service due dates and genuine limited-time offers. The message is the same for everyone, and the action is simple.

For a dealer, a broadcast about a weekend sales event to opted-in past customers is reasonable. For an installer, a reminder to existing customers that their annual service is due is useful. What does not work is using a broadcast to do the job of a conversation, such as trying to book a home survey or a test drive with a generic link.

How often should you text a lead?

Text a lead often enough to stay in the conversation and rarely enough not to annoy them: a first message, one or two follow-ups over the next week or two if there is no reply, then a gap of weeks or months before trying again. Always stop the moment someone opts out.

The pattern changes once they reply. A person in an active conversation expects quick answers, so reply in minutes, not hours. A person who says 'not until spring' should hear from you in spring, not next week.

Timing matters as much as frequency. Text during sensible hours, avoid early mornings and late nights, and remember that many replies arrive in the evening when people are home. That is the main reason an AI that can answer at 9pm books appointments a nine-to-five team misses.

What are the biggest SMS marketing mistakes?

The biggest mistakes are sending broadcasts where conversations are needed, and sending texts nobody answers. Both burn through a list that cost real money to build.

• Generic offers to old enquiries. '20% off this weekend' to someone who asked about a specific car or job feels like spam.
• Unanswered replies. A reply at 9pm that gets an answer at 11am the next day has often gone cold.
• No opt-out. It is a legal requirement in the UK and expected in the US.
• Too many messages too fast. Space follow-ups over days, not hours.
• No handover. When someone is ready to talk, a person needs to call them quickly.

How does AI make two-way SMS work at scale?

AI makes two-way SMS work at scale by answering every reply in seconds, at any hour, and booking appointments in the conversation. A sales team can hold a few dozen text conversations a day. An AI can hold thousands without dropping one.

Setterly runs this for home improvement businesses and automotive businesses on their old leads. An AI holds a two-way conversation with each lead and books the ones who are ready into your diary, with a person taking over whenever needed. It is free to start and you pay per booked appointment, with no setup fee and no retainer. CRM integration is optional for a one-off fee.

See our lead reactivation for home improvement, automotive lead reactivation and AI appointment setter pages, or read our guide to re-engaging old leads by SMS. To talk through your own list, book a call.